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Search for $h_b(2P)\to\gamma\chi_{bJ}(1P)$ at $\sqrt{s} = 10.860$ GeV
Belle Collaboration, A. Boschetti, R. Mussa, U. Tamponi, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, Sw. Banerjee, K. Belous, J. Bennett, M. Bessner, D. Biswas, A. Bobrov, D. Bodrov, A. Bozek, M. Bračko, P. Branchini, T. E. Browder, et al (123)
Oct 23 2024 hep-ex arXiv:2410.16181v1

@misc{2410.16181, author = {Belle Collaboration and A.~Boschetti and R.~Mussa and U.~Tamponi and I.~Adachi and H.~Aihara and D.~M.~Asner and T.~Aushev and R.~Ayad and Sw.~Banerjee and K.~Belous and J.~Bennett and M.~Bessner and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and Z.~Doležal and T.~V.~Dong and P.~Ecker and D.~Epifanov and D.~Ferlewicz and B.~G.~Fulsom and R.~Garg and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and W.-S.~Hou and C.-L.~Hsu and K.~Inami and N.~Ipsita and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and Y.~Jin and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and R.~Kumar and K.~Kumara and Y.-J.~Kwon and T.~Lam and D.~Levit and L.~K.~Li and Y.~B.~Li and L.~Li Gioi and D.~Liventsev and Y.~Ma and M.~Masuda and T.~Matsuda and D.~Matvienko and F.~Meier and M.~Merola and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and G.~Pakhlova and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and N.~Rout and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and W.~Shan and C.~P.~Shen and J.-G.~Shiu and A.~Sokolov and E.~Solovieva and M.~Starič and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and M.~Uchida and Y.~Unno and S.~Uno and A.~Vinokurova and E.~Wang and M.-Z.~Wang and X.~L.~Wang and E.~Won and B.~D.~Yabsley and J.~Yelton and J.~H.~Yin and Y.~Yook and L.~Yuan}, title = {{S}earch for $h_b(2{P})\to\gamma\chi_{b{J}}(1{P})$ at $\sqrt{s} = 10.860$ {G}e{V}}, year = {2024}, eprint = {2410.16181}, note = {arXiv:2410.16181v1} }
PDF
In the bottomonium sector, the hindered magnetic dipole (M1) transitions between P-wave states $h_b(2P) \rightarrow \chi_{bJ}(1P) \gamma$, $J=0, \, 1, \, 2$, are expected to be severely suppressed according to the Relativized Quark Model, due to the spin flip of the $b$ quark. Nevertheless, a recent model following the coupled-channel approach predicts the corresponding branching fractions to be enhanced by orders of magnitude. In this Letter, we report the first search for such transitions. We find no significant signals and set upper limits at 90% CL on the corresponding branching fractions: $\mathcal{B}[h_b(2P)\to\gamma\chi_{b0}(1P)] < 2.7 \times 10^{-1}$, $\mathcal{B}[h_b(2P)\to\gamma\chi_{b1}(1P)] < 5.4 \times 10^{-3}$ and $\mathcal{B}[h_b(2P)\to\gamma\chi_{b2}(1P)] < 1.3 \times 10^{-2}$. These values help to constrain the parameters of the coupled-channel models. The results are obtained using a $121.4 \, fb^{-1}$ data sample taken around $\sqrt{s}= 10.860 \, GeV$ with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.
Observation of time-dependent $CP$ violation and measurement of the branching fraction of $B^0 \to J/\psi \pi^0$ decays
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, N. K. Baghel, S. Bahinipati, P. Bambade, Sw. Banerjee, et al (374)
Oct 14 2024 hep-ex arXiv:2410.08622v1

@misc{2410.08622, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and N.~K.~Baghel and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and V.~Bhardwaj and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bondar and J.~Borah and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and J.~X.~Cui and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and D.~Epifanov and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and P.~Gironella and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and S.~Granderath and E.~Graziani and Z.~Gruberová and Y.~Guan and K.~Gudkova and I.~Haide and Y.~Han and T.~Hara and H.~Hayashii and S.~Hazra and C.~Hearty and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and R.~Hoppe and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and D.~Kalita and J.~Kandra and K.~H.~Kang and S.~Kang and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and J.-Y.~Kim and K.-H.~Kim and Y.-K.~Kim and Y.~J.~Kim and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and D.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and K.~Lalwani and T.~Lam and T.~S.~Lau and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and C.~Lemettais and P.~Leo and L.~K.~Li and Q.~M.~Li and W.~Z.~Li and Y.~Li and Y.~B.~Li and Y.~P.~Liao and J.~Libby and J.~Lin and M.~H.~Liu and Q.~Y.~Liu and Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and M.~Maggiora and S.~P.~Maharana and R.~Maiti and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and G.~B.~Mohanty and S.~Mondal and S.~Moneta and H.-G.~Moser and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and M.~Naruki and Z.~Natkaniec and A.~Natochii and M.~Nayak and G.~Nazaryan and M.~Neu and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and F.~Otani and P.~Pakhlov and G.~Pakhlova and E.~Paoloni and S.~Pardi and H.~Park and J.~Park and K.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and I.~Prudiiev and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and D.~A.~Sanders and S.~Sandilya and L.~Santelj and V.~Savinov and B.~Scavino and C.~Schmitt and S.~Schneider and M.~Schnepf and K.~Schoenning and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and W.~Song and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and J.~Strube and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and M.~Wakai and S.~Wallner and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and J.~Yelton and J.~H.~Yin and K.~Yoshihara and Y.~Yusa and L.~Zani and F.~Zeng and B.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{O}bservation of time-dependent ${CP}$ violation and measurement of the branching fraction of ${B}^0 \to {J}/\psi \pi^0$ decays}, year = {2024}, eprint = {2410.08622}, note = {arXiv:2410.08622v1} }
PDF
We present a measurement of the branching fraction and time-dependent charge-parity ($CP$) decay-rate asymmetries in $B^0 \to J/\psi \pi^0$ decays. The data sample was collected with the Belle~II detector at the SuperKEKB asymmetric $e^+e^-$ collider in 2019-2022 and contains $(387\pm 6)\times 10^6$ $B\overline{B}$ meson pairs from $\Upsilon(4S)$ decays. We reconstruct $392\pm 24$ signal decays and fit the $CP$ parameters from the distribution of the proper-decay-time difference of the two $B$ mesons. We measure the branching fraction to be $B(B^0 \to J/\psi \pi^0)=(2.02 \pm 0.12 \pm 0.10)\times 10^{-5}$ and the direct and mixing-induced $CP$ asymmetries to be $C_{CP}=0.13 \pm 0.12 \pm 0.03$ and $S_{CP}=-0.88 \pm 0.17 \pm 0.03$, respectively, where the first uncertainties are statistical and the second are systematic. We observe mixing-induced $CP$ violation with a significance of $5.0$ standard deviations for the first time in this mode.
Search for $C\!P$ violation in $D^+_{(s)}\to{}K_{S}^{0}K^{-}\pi^{+}\pi^{+}$ decays using triple and quadruple products
Belle, Belle II Collaborations, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, N. K. Baghel, S. Bahinipati, P. Bambade, Sw. Banerjee, et al (348)
Sep 25 2024 hep-ex arXiv:2409.15777v1

@misc{2409.15777, author = {Belle and Belle II Collaborations and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and N.~K.~Baghel and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and V.~Bhardwaj and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and J.~X.~Cui and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and D.~Epifanov and J.~Eppelt and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and P.~Gironella Gironell and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and E.~Graziani and Z.~Gruberová and Y.~Guan and K.~Gudkova and I.~Haide and Y.~Han and T.~Hara and H.~Hayashii and S.~Hazra and C.~Hearty and A.~Heidelbach and I.~Heredia de la Cruz and T.~Higuchi and M.~Hoek and M.~Hohmann and R.~Hoppe and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and J.-Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and K.~Lalwani and T.~Lam and T.~S.~Lau and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and C.~Lemettais and P.~Leo and C.~Li and L.~K.~Li and Q.~M.~Li and W.~Z.~Li and Y.~Li and Y.~B.~Li and Y.~P.~Liao and J.~Libby and J.~Lin and M.~H.~Liu and Q.~Y.~Liu and Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and M.~Maggiora and S.~P.~Maharana and R.~Maiti and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and A.~Martini and T.~Martinov and L.~Massaccesi and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and C.~Miller and M.~Mirra and S.~Mitra and S.~Mondal and S.~Moneta and H.-G.~Moser and I.~Nakamura and M.~Nakao and M.~Naruki and Z.~Natkaniec and A.~Natochii and M.~Nayak and G.~Nazaryan and M.~Neu and S.~Nishida and S.~Ogawa and H.~Ono and F.~Otani and E.~R.~Oxford and G.~Pakhlova and E.~Paoloni and S.~Pardi and H.~Park and J.~Park and K.~Park and S.-H.~Park and A.~Passeri and T.~K.~Pedlar and I.~Peruzzi and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and I.~Prudiiev and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and Y.~Sakai and D.~A.~Sanders and S.~Sandilya and L.~Santelj and V.~Savinov and B.~Scavino and S.~Schneider and M.~Schnepf and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and W.~Song and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and J.~Strube and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and I.~Ueda and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and S.~E.~Vahsen and R.~van Tonder and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and M.~Wakai and S.~Wallner and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and J.~Yelton and J.~H.~Yin and C.~Z.~Yuan and L.~Zani and F.~Zeng and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{S}earch for ${C}\!{P}$ violation in ${D}^+_{(s)}\to{}{K}_{{S}}^{0}{K}^{-}\pi^{+}\pi^{+}$ decays using triple and quadruple products}, year = {2024}, eprint = {2409.15777}, note = {arXiv:2409.15777v1} }
PDF
We perform the first search for $C\!P$ violation in ${D_{(s)}^{+}\to{}K_{S}^{0}K^{-}\pi^{+}\pi^{+}}$ decays. We use a combined data set from the Belle and Belle II experiments, which study $e^+e^-$ collisions at center-of-mass energies at or near the $\Upsilon(4S)$ resonance. We use 980 fb$^{-1}$ of data from Belle and 428 fb$^{-1}$ of data from Belle~II. We measure six $C\!P$-violating asymmetries that are based on triple products and quadruple products of the momenta of final-state particles, and also the particles' helicity angles. We obtain a precision at the level of 0.5% for $D^+\to{}K_{S}^{0}K^{-}\pi^{+}\pi^{+}$ decays, and better than 0.3% for $D^+_{s}\to{}K_{S}^{0}K^{-}\pi^{+}\pi^{+}$ decays. No evidence of $C\!P$ violation is found. Our results for the triple-product asymmetries are the most precise to date for singly-Cabibbo-suppressed $D^+$ decays. Our results for the other asymmetries are the first such measurements performed for charm decays.
Determination of $|V_{ub}|$ from simultaneous measurements of untagged $B^0\to\pi^- \ell^+ \nu_{\ell}$ and $B^+\to\rho^0 \ell^+\nu_{\ell}$ decays
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (400)
Jul 25 2024 hep-ex arXiv:2407.17403v1

@misc{2407.17403, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and J.~Borah and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and J.~X.~Cui and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and D.~Dorner and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and S.~Granderath and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and I.~Haide and S.~Halder and Y.~Han and T.~Hara and C.~Harris and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leo and C.~Lemettais and D.~Levit and P.~M.~Lewis and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Z.~Liptak and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and M.~Niiyama and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and G.~Pakhlova and S.~Pardi and K.~Parham and H.~Park and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and I.~Prudiiev and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and S.~Schneider and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and M.~Uchida and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and A.~Vossen and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and F.~Zeng and B.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{D}etermination of $|{V}_{ub}|$ from simultaneous measurements of untagged ${B}^0\to\pi^- \ell^+ \nu_{\ell}$ and ${B}^+\to\rho^0 \ell^+\nu_{\ell}$ decays}, year = {2024}, eprint = {2407.17403}, note = {arXiv:2407.17403v1} }
PDF
We present a measurement of $|V_{ub}|$ from a simultaneous study of the charmless semileptonic decays $B^0\to\pi^- \ell^+ \nu_{\ell}$ and $B^+\to\rho^0 \ell^+\nu_{\ell}$, where $\ell = e, \mu$. This measurement uses a data sample of 387 million $B\overline{B}$ meson pairs recorded by the Belle~II detector at the SuperKEKB electron-positron collider between 2019 and 2022. The two decays are reconstructed without identifying the partner $B$ mesons. We simultaneously measure the differential branching fractions of $B^0\to\pi^- \ell^+ \nu_{\ell}$ and $B^+\to\rho^0 \ell^+\nu_{\ell}$ decays as functions of $q^2$ (momentum transfer squared). From these, we obtain total branching fractions $B(B^0\to\pi^- \ell^+ \nu_{\ell}) = (1.516 \pm 0.042 (\mathrm{stat}) \pm 0.059 (\mathrm{syst})) \times 10^{-4}$ and $B(B^+\to\rho^0 \ell^+\nu_{\ell}) = (1.625 \pm 0.079 (\mathrm{stat}) \pm 0.180 (\mathrm{syst})) \times 10^{-4}$. By fitting the measured $B^0\to\pi^- \ell^+ \nu_{\ell}$ partial branching fractions as functions of $q^2$, together with constraints on the non-perturbative hadronic contribution from lattice QCD calculations, we obtain $|V_{ub}|$ = $(3.93 \pm 0.09 \pm 0.13 \pm 0.19) \times 10^{-3}$. Here, the first uncertainty is statistical, the second is systematic, and the third is theoretical.
Measurement of branching fractions, CP asymmetry, and isospin asymmetry for $\boldsymbol{B\rightarrow\rho\gamma}$ decays using Belle and Belle II data
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (390)
Jul 15 2024 hep-ex arXiv:2407.08984v1

@misc{2407.08984, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and H.~Hayashii and S.~Hazra and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and J.~Wiechczynski and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova}, title = {{M}easurement of branching fractions, {CP} asymmetry, and isospin asymmetry for $\boldsymbol{{B}\rightarrow\rho\gamma}$ decays using {B}elle and {B}elle {II} data}, year = {2024}, eprint = {2407.08984}, note = {arXiv:2407.08984v1} }
PDF
We present measurements of $B^{+}\rightarrow\rho^{+}\gamma$ and $B^{0}\rightarrow\rho^{0}\gamma$ decays using a combined data sample of $772 \times 10^6$ $B\overline{B}$ pairs collected by the Belle experiment and $387\times 10^6$ $B\overline{B}$ pairs collected by the Belle II experiment in $e^{+}e^{-}$ collisions at the $\Upsilon (4S)$ resonance. After an optimized selection, a simultaneous fit to the Belle and Belle II data sets yields $114\pm 12$ $B^{+}\rightarrow\rho^{+}\gamma$ and $99\pm 12$ $B^{0}\rightarrow\rho^{0}\gamma$ decays. The measured branching fractions are $(13.1^{+2.0 +1.3}_{-1.9 -1.2})\times 10^{-7}$ and $(7.5\pm 1.3^{+1.0}_{-0.8})\times 10^{-7}$ for $B^{+}\rightarrow\rho^{+}\gamma$ and $B^{0}\rightarrow\rho^{0}\gamma$ decays, respectively, where the first uncertainty is statistical and the second is systematic. We also measure the isospin asymmetry $A_{\rm I}(B\rightarrow\rho\gamma)=(10.9^{+11.2 +7.8}_{-11.7 -7.3})\%$ and the direct CP asymmetry $A_{CP}(B^{+}\rightarrow\rho^{+}\gamma)=(-8.2\pm 15.2^{+1.6}_{-1.2})\%$.
Measurement of $CP$ asymmetries in $B^0 \to K^0_S \pi^0 \gamma$ decays at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (419)
Jul 15 2024 hep-ex arXiv:2407.09139v1

@misc{2407.09139, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and S.~Bilokin and D.~Biswas and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and J.~X.~Cui and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and D.~Dorner and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and K.~Hara and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leo and D.~Levit and C.~Li and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Y.-R.~Lin and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and H.~Nakazawa and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and I.~Prudiiev and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and K.~Ravindran and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and E.~Won and Y.~Xie and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and F.~Zeng and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of ${CP}$ asymmetries in ${B}^0 \to {K}^0_{S} \pi^0 \gamma$ decays at {B}elle {II}}, year = {2024}, eprint = {2407.09139}, note = {arXiv:2407.09139v1} }
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We report measurements of time-dependent $CP$ asymmetries in $B^0 \to K^0_S \pi^0 \gamma$ decays based on a data sample of $(388\pm6)\times10^6$ $B\bar{B}$ events collected at the $\Upsilon(4S)$ resonance with the Belle II detector. The Belle II experiment operates at the SuperKEKB asymmetric-energy $e^+e^-$ collider. We measure decay-time distributions to determine $CP$-violating parameters $S$ and $C$. We determine these parameters for two ranges of $K^0_S \pi^0$ invariant mass: $m(K^0_S \pi^0)\in (0.8, 1.0)$ $GeV/c^2$, which is dominated by $B^0 \to K^{*0} (\to K^0_S \pi^0) \gamma$ decays, and a complementary region $m(K^0_S \pi^0)\in (0.6, 0.8)\cup(1.0, 1.8)$ $GeV/c^2$. Our results have improved precision as compared to previous measurements and are consistent with theory predictions.
Search for the baryon number and lepton number violating decays $\tau^-\to \Lambda\pi^-$ and $\tau^-\to \bar{\Lambda}\pi^-$ at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, et al (354)
Jul 09 2024 hep-ex arXiv:2407.05117v1

@misc{2407.05117, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and A.~Boschetti and A.~Bozek and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and R.~Cheaib and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and J.~X.~Cui and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dubey and G.~Dujany and P.~Ecker and D.~Epifanov and J.~Eppelt and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and P.~Gironella and A.~Glazov and B.~Gobbo and R.~Godang and P.~Goldenzweig and W.~Gradl and E.~Graziani and D.~Greenwald and Z.~Gruberová and K.~Gudkova and I.~Haide and S.~Halder and K.~Hara and C.~Harris and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and R.~Hoppe and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and D.~Y.~Kim and J.-Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and M.~J.~Lee and P.~Leo and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and W.~Z.~Li and Y.~Li and Y.~B.~Li and J.~Libby and J.~Lin and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and C.~Miller and M.~Mirra and S.~Mitra and S.~Mondal and S.~Moneta and H.-G.~Moser and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and S.~Nishida and S.~Ogawa and H.~Ono and P.~Pakhlov and E.~Paoloni and S.~Pardi and J.~Park and K.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and J.~M.~Roney and N.~Rout and S.~Sandilya and L.~Santelj and V.~Savinov and B.~Scavino and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and W.~Song and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Ueda and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and B.~Zhang and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{S}earch for the baryon number and lepton number violating decays $\tau^-\to \{L}ambda\pi^-$ and $\tau^-\to \bar{\{L}ambda}\pi^-$ at {B}elle {II}}, year = {2024}, eprint = {2407.05117}, note = {arXiv:2407.05117v1} }
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We present a search for the baryon number $B$ and lepton number $L$ violating decays $\tau^- \rightarrow \Lambda \pi^-$ and $\tau^- \rightarrow \bar{\Lambda} \pi^-$ produced from the $e^+e^-\to \tau^+\tau^-$ process, using a 364 fb$^{-1}$ data sample collected by the Belle~II experiment at the SuperKEKB collider. No evidence of signal is found in either decay mode, which have $|\Delta(B-L)|$ equal to $2$ and $0$, respectively. Upper limits at 90\% credibility level on the branching fractions of $\tau^- \rightarrow \Lambda\pi^-$ and $\tau^- \rightarrow \bar{\Lambda}\pi^-$ are determined to be $4.7 \times 10^{-8}$ and $4.3 \times 10^{-8}$, respectively.
Evidence of $h_{b}(\text{2P}) \to \Upsilon(\text{1S})\eta$ decay and search for $h_{b}(\text{1P,2P}) \to \Upsilon(\text{1S})\pi^0$ with the Belle detector
Belle Collaboration, E. Kovalenko, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, A. Bondar, A. Bozek, M. Bračko, P. Branchini, et al (147)
Jul 08 2024 hep-ex arXiv:2407.03783v1

@misc{2407.03783, author = {Belle Collaboration and E.~Kovalenko and I.~Adachi and H.~Aihara and D.~M.~Asner and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and K.~Belous and J.~Bennett and M.~Bessner and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and N.~Dash and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and D.~Epifanov and D.~Ferlewicz and B.~G.~Fulsom and R.~Garg and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and T.~Hara and K.~Hayasaka and S.~Hazra and W.-S.~Hou and C.-L.~Hsu and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and Y.~Jin and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and T.~Lam and D.~Levit and L.~K.~Li and L.~Li Gioi and J.~Libby and D.~Liventsev and Y.~Ma and A.~Martini and M.~Masuda and T.~Matsuda and D.~Matvienko and F.~Meier and M.~Merola and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and I.~Nakamura and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and M.~Niiyama and S.~Nishida and S.~Ogawa and H.~Ono and G.~Pakhlova and S.~Pardi and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and M.~V.~Purohit and N.~Rout and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and C.~Sharma and J.-G.~Shiu and B.~Shwartz and A.~Sokolov and E.~Solovieva and M.~Starič and M.~Sumihama and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and R.~Tiwary and M.~Uchida and Y.~Unno and S.~Uno and Y.~Usov and A.~Vinokurova and D.~Wang and E.~Wang and M.-Z.~Wang and X.~L.~Wang and E.~Won and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~Yook and C.~Z.~Yuan and Z.~P.~Zhang and V.~Zhilich}, title = {{E}vidence of $h_{b}(\text{2{P}}) \to \{U}psilon(\text{1{S}})\eta$ decay and search for $h_{b}(\text{1{P},2{P}}) \to \{U}psilon(\text{1{S}})\pi^0$ with the {B}elle detector}, year = {2024}, eprint = {2407.03783}, note = {arXiv:2407.03783v1} }
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We report the first evidence for the $h_{b}(\text{2P}) \to \Upsilon(\text{1S})\eta$ transition with a significance of $3.5$ standard deviations. The decay branching fraction is measured to be $\mathcal{B}[h_{b}(\text{2P}) \to \Upsilon(\text{1S})\eta]=(7.1 ~^{+3.7} _{-3.2}\pm 0.8)\times10^{-3}$, which is noticeably smaller than expected. We also set upper limits on $\pi^0$ transitions of $\mathcal{B}[h_{b}(\text{2P}) \to \Upsilon(\text{1S})\pi^0] < 1.8\times10^{-3}$, and $\mathcal{B}[h_{b}(\text{1P})\to \Upsilon(\text{1S})\pi^0] < 1.8\times10^{-3}$, at the $90\%$ confidence level. These results are obtained with a $131.4$~fb$^{-1}$ data sample collected near the $\Upsilon(\text{5S})$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.
Measurement of the integrated luminosity of data samples collected during 2019-2022 by the Belle II experiment
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, J. K. Ahn, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, et al (387)
Jul 02 2024 hep-ex arXiv:2407.00965v2

@misc{2407.00965, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and J.~K.~Ahn and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and A.~Boschetti and A.~Bozek and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and J.~X.~Cui and S.~Das and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and K.~Dort and D.~Dossett and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and D.~Epifanov and J.~Eppelt and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and P.~Gironella and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and I.~Haide and S.~Halder and Y.~Han and K.~Hara and T.~Hara and C.~Harris and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and R.~Hoppe and P.~Horak and C.-L.~Hsu and T.~Humair and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and M.~Kaleta and D.~Kalita and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and J.-Y.~Kim and K.-H.~Kim and Y.-K.~Kim and Y.~J.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and M.~J.~Lee and C.~Lemettais and P.~Leo and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and S.~X.~Li and W.~Z.~Li and Y.~Li and Y.~B.~Li and Y.~P.~Liao and J.~Libby and J.~Lin and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and G.~B.~Mohanty and S.~Mondal and S.~Moneta and H.-G.~Moser and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and P.~Pakhlov and G.~Pakhlova and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and J.~Park and K.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and M.~Schnepf and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and W.~Song and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and E.~Torassa and K.~Trabelsi and I.~Ueda and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and A.~Vossen and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and B.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of the integrated luminosity of data samples collected during 2019-2022 by the {B}elle {II} experiment}, year = {2024}, eprint = {2407.00965}, note = {arXiv:2407.00965v2} }
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A series of data samples was collected with the Belle~II detector at the SuperKEKB collider from March 2019 to June 2022. We determine the integrated luminosities of these data samples using three distinct methodologies involving Bhabha ($e^+e^- \to e^+e^-(n\gamma)$), digamma ($e^+e^- \to \gamma\gamma(n\gamma)$), and dimuon ($e^+e^- \to \mu^+ \mu^- (n\gamma)$) events. The total integrated luminosity obtained with Bhabha, digamma, and dimuon events is (426.88 $\pm$ 0.03 $\pm$ 2.61)~fb$^{-1}$, (429.28 $\pm$ 0.03 $\pm$ 2.62)~fb$^{-1}$, and (423.99 $\pm$ 0.04 $\pm$ 3.83)~fb$^{-1}$, where the first uncertainties are statistical and the second are systematic. The resulting total integrated luminosity obtained from the combination of the three methods is (427.87 $\pm$ 2.01)~fb$^{-1}$.
Study of $\chi_{bJ}(2P)\to\omega\Upsilon(1S)$ at Belle
Belle Collaboration, Z. S. Stottler, T. K. Pedlar, B. G. Fulsom, I. Adachi, K. Adamczyk, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, et al (162)
Jul 02 2024 hep-ex arXiv:2407.00879v3

@misc{2407.00879, author = {Belle Collaboration and Z.~S.~Stottler and T.~K.~Pedlar and B.~G.~Fulsom and I.~Adachi and K.~Adamczyk and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and J.~Bennett and F.~Bernlochner and M.~Bessner and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and G.~Bonvicini and J.~Borah and A.~Bozek and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and L.~Cao and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and D.~Epifanov and T.~Ferber and D.~Ferlewicz and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and T.~Hara and K.~Hayasaka and S.~Hazra and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and Y.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and A.~B.~Kaliyar and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and T.~Lam and M.~Laurenza and S.~C.~Lee and D.~Levit and P.~Lewis and L.~K.~Li and J.~Libby and K.~Lieret and D.~Liventsev and T.~Luo and Y.~Ma and M.~Masuda and S.~K.~Maurya and F.~Meier and M.~Merola and K.~Miyabayashi and G.~B.~Mohanty and I.~Nakamura and M.~Nakao and A.~Natochii and L.~Nayak and N.~K.~Nisar and S.~Nishida and K.~Ogawa and S.~Ogawa and H.~Ono and P.~Oskin and P.~Pakhlov and G.~Pakhlova and T.~Pang and S.~Pardi and J.~Park and S.-H.~Park and S.~Patra and S.~Paul and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and N.~Rout and G.~Russo and S.~Sandilya and A.~Sangal and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and W.~Shan and M.~Shapkin and C.~Sharma and J.-G.~Shiu and A.~Sokolov and E.~Solovieva and M.~Starič and M.~Sumihama and W.~Sutcliffe and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and M.~Uchida and Y.~Unno and S.~Uno and S.~E.~Vahsen and G.~Varner and D.~Wang and E.~Wang and M.-Z.~Wang and S.~Watanuki and O.~Werbycka and E.~Won and B.~D.~Yabsley and W.~Yan and J.~H.~Yin and C.~Z.~Yuan and L.~Yuan and Y.~Yusa and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}tudy of $\chi_{b{J}}(2{P})\to\omega\{U}psilon(1{S})$ at {B}elle}, year = {2024}, eprint = {2407.00879}, note = {arXiv:2407.00879v3} }
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We report a study of the hadronic transitions $\chi_{bJ}(2P)\to\omega\Upsilon(1S)$, with $\omega\to\pi^{+}\pi^{-}\pi^{0}$, using $28.2\times10^6~\Upsilon(3S)$ mesons recorded by the Belle detector. We present the first evidence for the near--threshold transition $\chi_{b0}(2P)\to\omega\Upsilon(1S)$, the analog of the charm sector decay $\chi_{c1}(3872)\to\omega J/\psi$, with a branching fraction of $B\big(\chi_{b0}(2P)\to\omega\Upsilon(1S)\big) = \big(0.55\pm0.19\pm0.07\big)\%$. We also obtain branching fractions of $B\big(\chi_{b1}(2P)\to\omega\Upsilon(1S)\big) = \big(2.39{}^{+0.20}_{-0.19}\pm0.24\big)\%$ and $B\big(\chi_{b2}(2P)\to\omega\Upsilon(1S)\big) = \big(0.47{}^{+0.13}_{-0.12}\pm0.06\big)\%$, confirming the measurement of the $\omega$ transitions of the $J=1,2~P$--wave states. The ratio for the $J=2$ to $J=1$ transitions is also measured and found to differ by 3.3 standard deviations from the expected value in the QCD multipole expansion.
Search for charmed baryons in the $\Lambda_c^+\eta$ system and measurement of the branching fractions of $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$ decaying to $\Lambda_c^+\eta$ and $pD^0$ relative to $\Sigma_c(2455)\pi$
Belle Collaboration, S. X. Li, C. P. Shen, I. Adachi, J. K. Ahn, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, Sw. Banerjee, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, D. Bodrov, A. Bozek, M. Bračko, P. Branchini, et al (108)
Jun 25 2024 hep-ex hep-ph arXiv:2406.15965v2

@misc{2406.15965, author = {Belle Collaboration and S.~X.~Li and C.~P.~Shen and I.~Adachi and J.~K.~Ahn and H.~Aihara and D.~M.~Asner and H.~Atmacan and T.~Aushev and R.~Ayad and Sw.~Banerjee and K.~Belous and J.~Bennett and M.~Bessner and T.~Bilka and D.~Biswas and D.~Bodrov and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and N.~Dash and G.~De Nardo and G.~De Pietro and R.~Dhamija and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and T.~Ferber and B.~G.~Fulsom and V.~Gaur and A.~Garmash and P.~Goldenzweig and E.~Graziani and B.~Grube and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and C.-L.~Hsu and N.~Ipsita and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and C.~Kiesling and D.~Y.~Kim and Y.~J.~Kim and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and K.~Kumara and Y.-J.~Kwon and L.~K.~Li and Y.~Li and Y.~B.~Li and D.~Liventsev and M.~Masuda and S.~K.~Maurya and F.~Meier and M.~Merola and K.~Miyabayashi and R.~Mizuk and R.~Mussa and T.~Nakano and M.~Nakao and A.~Natochii and M.~Nayak and S.~Nishida and P.~Pakhlov and G.~Pakhlova and S.~Pardi and J.~Park and S.-H.~Park and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and G.~Russo and S.~Sandilya and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and J.-G.~Shiu and E.~Solovieva and M.~Starič and M.~Sumihama and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and M.~Uchida and T.~Uglov and S.~Uno and E.~Wang and E.~Won and B.~D.~Yabsley and W.~Yan and J.~Yelton and J.~H.~Yin and L.~Yuan and V.~Zhilich}, title = {{S}earch for charmed baryons in the $\{L}ambda_c^+\eta$ system and measurement of the branching fractions of $\{L}ambda_c(2880)^+$ and $\{L}ambda_c(2940)^+$ decaying to $\{L}ambda_c^+\eta$ and $p{D}^0$ relative to $\{S}igma_c(2455)\pi$}, year = {2024}, eprint = {2406.15965}, note = {arXiv:2406.15965v2} }
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We search for excited charmed baryons in the $\Lambda_c^+\eta$ system using a data sample corresponding to an integrated luminosity of 980 $\rm fb^{-1}$. The data were collected by the Belle detector at the KEKB $e^{+}$$e^{-}$ asymmetric-energy collider. No significant signals are found in the $\Lambda_c^+\eta$ mass spectrum, including the known $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$. Clear $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$ signals are observed in the $pD^0$ mass spectrum. We set upper limits at 90\% credibility level on ratios of branching fractions of $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$ decaying to $\Lambda_c^+\eta$ relative to $\Sigma_c(2455)\pi$ of $<0.13$ for the $\Lambda_c(2880)^+$ and $<1.11$ for the $\Lambda_c(2940)^+$. We measure ratios of branching fractions of $\Lambda_c(2880)^+$ and $\Lambda_c(2940)^+$ decaying to $pD^0$ relative to $\Sigma_c(2455)\pi$ of $0.75 \pm 0.03(\text{stat.}) \pm 0.07(\text{syst.})$ for the $\Lambda_c(2880)^+$ and $3.59 \pm 0.21(\text{stat.}) \pm 0.56(\text{syst.})$ for the $\Lambda_c(2940)^+$.
Measurement of the branching fractions of $\bar{B}\to D^{(*)} K^- K^{(*)0}_{(S)}$ and $\bar{B}\to D^{(*)}D_s^{-}$ decays at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (387)
Jun 11 2024 hep-ex arXiv:2406.06277v4

@misc{2406.06277, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and J.~X.~Cui and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and D.~Dorner and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and I.~Haide and S.~Halder and Y.~Han and T.~Hara and C.~Harris and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and K.~Lalwani and T.~Lam and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and C.~Lemettais and P.~Leo and D.~Levit and P.~M.~Lewis and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Z.~Liptak and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and F.~Meier and M.~Merola and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and M.~Niiyama and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and G.~Pakhlova and S.~Pardi and K.~Parham and H.~Park and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and S.~Schneider and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and H.~Svidras and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and A.~Vossen and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and J.~Wiechczynski and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and F.~Zeng and B.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of the branching fractions of $\bar{{B}}\to {D}^{(*)} {K}^- {K}^{(*)0}_{({S})}$ and $\bar{{B}}\to {D}^{(*)}{D}_s^{-}$ decays at {B}elle {II}}, year = {2024}, eprint = {2406.06277}, howpublished = {J. High Energ. Phys. 08 (2024) 206}, doi = {10.1007/JHEP08(2024)206}, note = {arXiv:2406.06277v4} }
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We present measurements of the branching fractions of eight $\overline B{}^0\to D^{(*)+} K^- K^{(*)0}_{(S)}$, $B^{-}\to D^{(*)0} K^- K^{(*)0}_{(S)}$ decay channels. The results are based on data from SuperKEKB electron-positron collisions at the $\Upsilon(4S)$ resonance collected with the Belle II detector, corresponding to an integrated luminosity of $362~\text{fb}^{-1}$. The event yields are extracted from fits to the distributions of the difference between expected and observed $B$ meson energy, and are efficiency-corrected as a function of $m(K^-K^{(*)0}_{(S)})$ and $m(D^{(*)}K^{(*)0}_{(S)})$ in order to avoid dependence on the decay model. These results include the first observation of $\overline B{}^0\to D^+K^-K_S^0$, $B^-\to D^{*0}K^-K_S^0$, and $\overline B{}^0\to D^{*+}K^-K_S^0$ decays and a significant improvement in the precision of the other channels compared to previous measurements. The helicity-angle distributions and the invariant mass distributions of the $K^- K^{(*)0}_{(S)}$ systems are compatible with quasi-two-body decays via a resonant transition with spin-parity $J^P=1^-$ for the $K^-K_S^0$ systems and $J^P= 1^+$ for the $K^-K^{*0}$ systems. We also present measurements of the branching fractions of four $\overline B{}^0\to D^{(*)+} D_s^-$, $B^{-}\to D^{(*)0} D_s^- $ decay channels with a precision compatible to the current world averages.
Measurements of the branching fractions of $\Xi_{c}^{0}\to\Xi^{0}\pi^{0}$, $\Xi_{c}^{0}\to\Xi^{0}\eta$, and $\Xi_{c}^{0}\to\Xi^{0}\eta^{\prime}$ and asymmetry parameter of $\Xi_{c}^{0}\to\Xi^{0}\pi^{0}$
Belle, Belle II Collaborations, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, et al (364)
Jun 10 2024 hep-ex hep-ph arXiv:2406.04642v2

@misc{2406.04642, author = {Belle and Belle II Collaborations and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and J.~X.~Cui and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and I.~Haide and S.~Halder and Y.~Han and T.~Hara and C.~Harris and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and M.~Kaleta and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and K.~Lalwani and T.~Lam and J.~S.~Lange and M.~Laurenza and R.~Leboucher and M.~J.~Lee and C.~Lemettais and P.~Leo and D.~Levit and P.~M.~Lewis and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Z.~Liptak and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and G.~B.~Mohanty and S.~Moneta and H.-G.~Moser and M.~Mrvar and I.~Nakamura and M.~Nakao and Y.~Nakazawa and M.~Naruki and Z.~Natkaniec and A.~Natochii and M.~Nayak and G.~Nazaryan and M.~Neu and M.~Niiyama and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and G.~Pakhlova and S.~Pardi and K.~Parham and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and S.~Schneider and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and E.~Solovieva and W.~Song and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and N.~Suwonjandee and H.~Svidras and M.~Takahashi and M.~Takizawa and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and A.~Vossen and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and F.~Zeng and B.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurements of the branching fractions of $\{X}i_{c}^{0}\to\{X}i^{0}\pi^{0}$, $\{X}i_{c}^{0}\to\{X}i^{0}\eta$, and $\{X}i_{c}^{0}\to\{X}i^{0}\eta^{\prime}$ and asymmetry parameter of $\{X}i_{c}^{0}\to\{X}i^{0}\pi^{0}$}, year = {2024}, eprint = {2406.04642}, howpublished = {JHEP10(2024)045}, doi = {10.1007/JHEP10(2024)045}, note = {arXiv:2406.04642v2} }
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We present a study of $\Xi_{c}^{0}\to\Xi^{0}\pi^{0}$, $\Xi_{c}^{0}\to\Xi^{0}\eta$, and $\Xi_{c}^{0}\to\Xi^{0}\eta^{\prime}$ decays using the Belle and Belle~II data samples, which have integrated luminosities of 980~$\mathrm{fb}^{-1}$ and 426~$\mathrm{fb}^{-1}$, respectively. We measure the following relative branching fractions $$\cal B(\Xi_c^0\to\Xi^0\pi^0)/\cal B(\Xi_c^0\to\Xi^-\pi^+) = 0.48 \pm 0.02 (\rm stat) \pm 0.03 (\rm syst) ,$$ $$\cal B(\Xi_c^0\to\Xi^0\eta)/\cal B(\Xi_c^0\to\Xi^-\pi^+) = 0.11 \pm 0.01 (\rm stat) \pm 0.01 (\rm syst) ,$$ $$\cal B(\Xi_c^0\to\Xi^0\eta^\prime)/\cal B(\Xi_c^0\to\Xi^-\pi^+) = 0.08 \pm 0.02 (\rm stat) \pm 0.01 (\rm syst) $$ for the first time, where the uncertainties are statistical ($\rm stat$) and systematic ($\rm syst$). By multiplying by the branching fraction of the normalization mode, ${\mathcal B}(\Xi_{c}^{0}\to\Xi^{-}\pi^{+})$, we obtain the following absolute branching fraction results $(6.9 \pm 0.3 ({\rm stat}) \pm 0.5 ({\rm syst}) \pm 1.3 ({\rm norm})) \times 10^{-3}$, $(1.6 \pm 0.2 ({\rm stat}) \pm 0.2 ({\rm syst}) \pm 0.3 ({\rm norm})) \times 10^{-3}$, and $(1.2 \pm 0.3 ({\rm stat}) \pm 0.1 ({\rm syst}) \pm 0.2 ({\rm norm})) \times 10^{-3}$, for $\Xi_{c}^{0}$ decays to $\Xi^{0}\pi^{0}$, $\Xi^{0}\eta$, and $\Xi^{0}\eta^{\prime}$ final states, respectively. The third errors are from the uncertainty on ${\mathcal B}(\Xi_{c}^{0}\to\Xi^{-}\pi^{+})$. The asymmetry parameter for $\Xi_{c}^{0}\to\Xi^{0}\pi^{0}$ is measured to be $\alpha(\Xi_{c}^{0}\to\Xi^{0}\pi^{0}) = -0.90\pm0.15({\rm stat})\pm0.23({\rm syst})$.
Search for the decay $B^{0}\to\gamma\gamma$ using Belle and Belle II data
Belle, Belle II Collaborations, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, S. Al Said, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, et al (389)
May 31 2024 hep-ex arXiv:2405.19734v2

@misc{2405.19734, author = {Belle and Belle II Collaborations and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and S.~Al Said and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and K.~Belous and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and J.~Borah and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasxoli and M.-C.~Chang and P.~Chang and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and J.~X.~Cui and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and D.~Dorner and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and E.~Ganiev and M.~Garcia-Hernandez and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and I.~Haide and Y.~Han and T.~Hara and C.~Harris and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and K.~Lalwani and T.~Lam and J.~S.~Lange and M.~Laurenza and R.~Leboucher and M.~J.~Lee and C.~Lemettais and P.~Leo and D.~Levit and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Z.~Liptak and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and G.~B.~Mohanty and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and I.~Nakamura and M.~Nakao and Y.~Nakazawa and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and M.~Nayak and G.~Nazaryan and M.~Neu and M.~Niiyama and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and G.~Pakhlova and S.~Pardi and K.~Parham and H.~Park and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and I.~Prudiiev and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and S.~Schneider and G.~Schnell and M.~Schnepf and K.~Schoenning and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and N.~Suwonjandee and H.~Svidras and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and A.~Vossen and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and Y.~Xie and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and F.~Zeng and B.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{S}earch for the decay ${B}^{0}\to\gamma\gamma$ using {B}elle and {B}elle {II} data}, year = {2024}, eprint = {2405.19734}, howpublished = {Phys. Rev. D 110, L031106 (2024)}, doi = {10.1103/PhysRevD.110.L031106}, note = {arXiv:2405.19734v2} }
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We report the result of a search for the rare decay $B^{0} \to \gamma \gamma$ using a combined dataset of $753\times10^{6}$ $B\bar{B}$ pairs collected by the Belle experiment and $387\times10^{6}$ $B\bar{B}$ pairs collected by the Belle II experiment from decays of the $\rm \Upsilon(4S)$ resonance produced in $e^{+}e^{-}$ collisions. A simultaneous fit to the Belle and Belle II data sets yields $11.0^{+6.5}_{-5.5}$ signal events, corresponding to a 2.5$\sigma$ significance. We determine the branching fraction $\mathcal{B}(B^{0} \to \gamma\gamma) = (3.7^{+2.2}_{-1.8}(\rm stat)\pm0.5(\rm syst))\times10^{-8}$ and set a 90% credibility level upper limit of $\mathcal{B}(B^{0} \to \gamma\gamma) < 6.4\times10^{-8}$.
Measurement of the energy dependence of the $e^+e^- \to B\bar{B}$, $B\bar{B}{}^*$, and $B^*\bar{B}{}^*$ cross sections at Belle~II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, et al (449)
May 30 2024 hep-ex arXiv:2405.18928v2

@misc{2405.18928, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and J.~X.~Cui and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and D.~Dorner and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and K.~Hara and T.~Hara and C.~Harris and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and Y.~Kulii and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leitl and P.~Leo and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and S.~Privalov and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and K.~Ravindran and M.~Reif and S.~Reiter and M.~Remnev and L.~Reuter and I.~Ripp-Baudot and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and S.~Schneider and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and K.~Smith and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and F.~Zeng and B.~Zhang and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of the energy dependence of the $e^+e^- \to {B}\bar{{B}}$, ${B}\bar{{B}}{}^*$, and ${B}^*\bar{{B}}{}^*$ cross sections at {B}elle~{II}}, year = {2024}, eprint = {2405.18928}, note = {arXiv:2405.18928v2} }
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We report measurements of the $e^+e^- \to B\bar{B}$, $B\bar{B}{}^*$, and $B^*\bar{B}{}^*$ cross sections at four energies, 10653, 10701, 10746 and 10805 MeV, using data collected by the Belle~II experiment. We reconstruct one $B$ meson in a large number of hadronic final states and use its momentum to identify the production process. In the first $2-5$ MeV above $B^*\bar{B}{}^*$ threshold, the $e^+e^- \to B^*\bar{B}{}^*$ cross section increases rapidly. This may indicate the presence of a pole close to the threshold.
Tau physics at Belle and Belle II
Denis Bodrov
May 28 2024 hep-ex arXiv:2405.16512v1

@misc{2405.16512, author = {Denis Bodrov}, title = {{T}au physics at {B}elle and {B}elle {II}}, year = {2024}, eprint = {2405.16512}, note = {arXiv:2405.16512v1} }
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We present here the major results obtained in $\tau$ physics by the Belle and Belle II experiments. For the Belle II experiment, we also discuss prospects for improved measurements of the $\tau$ lepton properties, new results in Michel parameters determination, and searches for $CP$ and lepton flavor violation in $\tau$ decays.
Test of light-lepton universality in $\tau$ decays with the Belle II experiment
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, et al (411)
May 24 2024 hep-ex arXiv:2405.14625v2

@misc{2405.14625, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and F.~Bianchi and L.~Bierwirth and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and J.~Borah and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and J.~X.~Cui and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and D.~Dorner and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leo and C.~Lemettais and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Z.~Liptak and M.~H.~Liu and Q.~Y.~Liu and Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and H.~Nakazawa and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and J.~Ninkovic and S.~Nishida and A.~Novosel and S.~Ogawa and Y.~Onishchuk and H.~Ono and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and I.~Prudiiev and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and F.~Zeng and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{T}est of light-lepton universality in $\tau$ decays with the {B}elle {II} experiment}, year = {2024}, eprint = {2405.14625}, howpublished = {Journal of High Energy Physics 08 (2024) 205}, doi = {10.1007/JHEP08(2024)205}, note = {arXiv:2405.14625v2} }
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We present a measurement of the ratio $R_\mu = \mathcal{B}(\tau^-\to \mu^-\bar\nu_\mu\nu_\tau) / \mathcal{B}(\tau^-\to e^-\bar\nu_e\nu_\tau)$ of branching fractions $\mathcal{B}$ of the $\tau$ lepton decaying to muons or electrons using data collected with the Belle II detector at the SuperKEKB $e^+e^-$ collider. The sample has an integrated luminosity of $362\!\pm\!2\,\text{fb}^{-1}$ at a centre-of-mass energy of $10.58\,\text{GeV}$. Using an optimised event selection, a binned maximum likelihood fit is performed using the momentum spectra of the electron and muon candidates. The result, $R_\mu = 0.9675 \pm 0.0007 \pm 0.0036$, where the first uncertainty is statistical and the second is systematic, is the most precise to date. It provides a stringent test of the light-lepton universality, translating to a ratio of the couplings of the muon and electron to the $W$ boson in $\tau$ decays of $0.9974 \pm 0.0019$, in agreement with the standard model expectation of unity.
Search for Two-Body $B$ Meson Decays to $\Lambda^{0}$ and $\Omega^{(*)0}_{c}$
Belle Collaboration, V. Savinov, I. Adachi, J. K. Ahn, H. Aihara, D. M. Asner, H. Atmacan, R. Ayad, Sw. Banerjee, J. Bennett, M. Bessner, V. Bhardwaj, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, M. Bračko, P. Branchini, T. E. Browder, A. Budano, et al (129)
May 21 2024 hep-ex arXiv:2405.11390v1

@misc{2405.11390, author = {Belle Collaboration and V.~Savinov and I.~Adachi and J.~K.~Ahn and H.~Aihara and D.~M.~Asner and H.~Atmacan and R.~Ayad and Sw.~Banerjee and J.~Bennett and M.~Bessner and V.~Bhardwaj and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and D.~Červenkov and M.-C.~Chang and P.~Chang and B.~G.~Cheon and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and N.~Dash and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and S.~Dubey and P.~Ecker and D.~Epifanov and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and H.~Hayashii and S.~Hazra and M.~T.~Hedges and W.-S.~Hou and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and Y.~Jin and D.~Kalita and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and T.~Kumita and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and T.~Lam and J.~S.~Lange and L.~K.~Li and Y.~Li and Y.~B.~Li and L.~Li Gioi and J.~Libby and D.~Liventsev and T.~Luo and Y.~Ma and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and I.~Nakamura and M.~Nakao and Z.~Natkaniec and L.~Nayak and M.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and P.~Pakhlov and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and G.~Russo and S.~Sandilya and L.~Santelj and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and W.~Shan and C.~Sharma and J.-G.~Shiu and E.~Solovieva and M.~Starič and M.~Sumihama and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and M.~Uchida and Y.~Unno and S.~Uno and K.~E.~Varvell and E.~Wang and S.~Watanuki and E.~Won and X.~Xu and B.~D.~Yabsley and W.~Yan and J.~H.~Yin and C.~Z.~Yuan and L.~Yuan and Y.~Yusa and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for {T}wo-{B}ody ${B}$ {M}eson {D}ecays to $\{L}ambda^{0}$ and $\{O}mega^{(*)0}_{c}$}, year = {2024}, eprint = {2405.11390}, note = {arXiv:2405.11390v1} }
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We report the results of the first search for Standard Model and baryon-number-violating two-body decays of the neutral $B$ mesons to $\Lambda^{0}$ and $\Omega^{(*)0}_c$ using 711~${\rm fb^{-1}}$ of data collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We observe no evidence of signal from any such decays and set 95\% confidence-level upper limits on the products of $B^0$ and $\bar{B}^0$ branching fractions for these two-body decays with $\mathcal{B}(\Omega_{c}^{0} \to \pi^+ \Omega^-)$ in the range between 9.5~$\times 10^{-8}$ and 31.2~$\times 10^{-8}$.
Search for lepton-flavor-violating $\tau^- \to \mu^-\mu^+\mu^-$ decays at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Althubiti, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, et al (412)
May 14 2024 hep-ex arXiv:2405.07386v1

@misc{2405.07386, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Althubiti and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and J.~Borah and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and Q.~Campagna and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and J.~X.~Cui and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and D.~Dorner and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and C.~Harris and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leo and C.~Lemettais and D.~Levit and P.~M.~Lewis and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and M.~H.~Liu and Q.~Y.~Liu and Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and G.~B.~Mohanty and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and J.~Ninkovic and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and F.~Otani and P.~Pakhlov and G.~Pakhlova and S.~Pardi and K.~Parham and H.~Park and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and I.~Prudiev and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and L.~Reuter and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and S.~Schneider and C.~Schwanda and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and K.~Smith and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and A.~Vossen and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and F.~Zeng and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{S}earch for lepton-flavor-violating $\tau^- \to \mu^-\mu^+\mu^-$ decays at {B}elle {II}}, year = {2024}, eprint = {2405.07386}, note = {arXiv:2405.07386v1} }
PDF
We present the result of a search for the charged-lepton-flavor violating decay $\tau^- \to \mu^-\mu^+\mu^-$ using a $424fb^{-1}$ sample of data recorded by the Belle II experiment at the SuperKEKB $e^{-}e^{+}$ collider. The selection of $e^{-}e^{+}\to\tau^+\tau^-$ events is based on an inclusive reconstruction of the non-signal tau decay, and on a boosted decision tree to suppress background. We observe one signal candidate, which is compatible with the expectation from background processes. We set a $90\%$ confidence level upper limit of $1.9 \times 10^{-8}$ on the branching fraction of the \taumu decay, which is the most stringent bound to date.
Determination of the CKM angle $\phi_{3}$ from a combination of Belle and Belle II results
Belle, Belle II Collaborations, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, S. Al Said, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (381)
Apr 23 2024 hep-ex arXiv:2404.12817v2

@misc{2404.12817, author = {Belle and Belle II Collaborations and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and S.~Al Said and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and K.~Belous and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and L.~Corona and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and H.~Hayashii and S.~Hazra and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and M.~J.~Lee and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and G.~Schnell and C.~Schwanda and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and V.~I.~Zhukova}, title = {{D}etermination of the {CKM} angle $\phi_{3}$ from a combination of {B}elle and {B}elle {II} results}, year = {2024}, eprint = {2404.12817}, note = {arXiv:2404.12817v2} }
PDF
We report a determination of the CKM angle $\phi_{3}$, also known as $\gamma$, from a combination of measurements using samples of up to 711~fb$^{-1}$ from the Belle experiment and up to 362~fb$^{-1}$ from the Belle II experiment. We combine results from analyses of $B^+\to DK^+, B^+\to D\pi^+$, and $B^+ \to D^{*}K^+$ decays, where $D$ is an admixture of $D^0$ and $\overline{D}{}^{0}$ mesons, in a likelihood fit to obtain $\phi_{3} = (78.6^{+7.2}_{-7.3})^{\circ}$. We also briefly discuss the interpretation of this result.
Measurement of the branching fraction of the decay $B^- \to D^0 \rho(770)^-$ at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, J. Baudot, et al (372)
Apr 18 2024 hep-ex arXiv:2404.10874v2

@misc{2404.10874, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and A.~Boschetti and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and J.~X.~Cui and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and D.~Dorner and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and S.~Jia and Y.~Jin and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leo and C.~Lemettais and D.~Levit and P.~M.~Lewis and L.~K.~Li and S.~X.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Z.~Liptak and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martens and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and F.~Mawas and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and C.~Miller and M.~Mirra and S.~Mitra and G.~B.~Mohanty and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and M.~Niiyama and S.~Nishida and A.~Novosel and S.~Ogawa and Y.~Onishchuk and H.~Ono and G.~Pakhlova and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and I.~Ripp-Baudot and G.~Rizzo and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~P.~Shen and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and I.~Ueda and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and O.~Werbycka and C.~Wessel and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and F.~Zeng and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of the branching fraction of the decay ${B}^- \to {D}^0 \rho(770)^-$ at {B}elle {II}}, year = {2024}, eprint = {2404.10874}, howpublished = {PRD 109, 111103 (2024)}, doi = {10.1103/PhysRevD.109.L111103}, note = {arXiv:2404.10874v2} }
PDF
We measure the branching fraction of the decay $B^- \to D^0 \rho(770)^-$ using data collected with the Belle II detector. The data contain 387 million $B\overline{B}$ pairs produced in $e^+e^-$ collisions at the $\Upsilon(4S)$ resonance. We reconstruct $8360\pm 180$ decays from an analysis of the distributions of the $B^-$ energy and the $\rho(770)^-$ helicity angle. We determine the branching fraction to be $(0.939 \pm 0.021\mathrm{(stat)} \pm 0.050\mathrm{(syst)})\%$, in agreement with previous results. Our measurement improves the relative precision of the world average by more than a factor of two.
Search for Rare $b \to d\ell^+\ell^-$ Transitions at Belle
Belle, Belle II Collaborations, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, S. Al Said, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, et al (375)
Apr 15 2024 hep-ex arXiv:2404.08133v2

@misc{2404.08133, author = {Belle and Belle II Collaborations and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and S.~Al Said and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Beaubien and F.~Becherer and J.~Becker and K.~Belous and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leo and D.~Levit and P.~M.~Lewis and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Q.~Y.~Liu and Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and C.~Marinas and C.~Martellini and T.~Martinov and L.~Massaccesi and M.~Masuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and J.~Ninkovic and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and F.~Otani and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and G.~Schnell and C.~Schwanda and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and M.~E.~Sevior and C.~Sfienti and W.~Shan and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and N.~Suwonjandee and H.~Svidras and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and F.~Zeng and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{S}earch for {R}are $b \to d\ell^+\ell^-$ {T}ransitions at {B}elle}, year = {2024}, eprint = {2404.08133}, howpublished = {Phys. Rev. Lett. 133, 101804 (2024)}, doi = {10.1103/PhysRevLett.133.101804}, note = {arXiv:2404.08133v2} }
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We present the results of a search for the $b \to d\ell^+\ell^-$ flavor-changing neutral-current rare decays $B^{+, 0} \to (\eta, \omega, \pi^{+,0}, \rho^{+, 0}) e^+e^-$ and $B^{+, 0} \to (\eta, \omega, \pi^{0}, \rho^{+}) \mu^+\mu^-$ using a $711$ fb$^{-1}$ data sample that contains $772 \times 10^{6}$ $B\overline{B}$ events. The data were collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We find no evidence for signal and set upper limits on branching fractions at the $90\%$ confidence level in the range $(3.8 - 47) \times 10^{-8}$ depending on the decay channel. The obtained limits are the world's best results. This is the first search for the channels $B^{+, 0} \to (\omega, \rho^{+,0}) e^+e^-$ and $B^{+, 0} \to (\omega, \rho^{+})\mu^+\mu^-$.
Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range 0.62-3.50 GeV at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, J. Baudot, et al (343)
Apr 09 2024 hep-ex arXiv:2404.04915v1

@misc{2404.04915, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and K.~Dugic and G.~Dujany and P.~Ecker and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and K.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leo and D.~Levit and L.~K.~Li and Y.~Li and J.~Libby and Q.~Y.~Liu and Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and C.~Marinas and C.~Martellini and A.~Martens and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and F.~Mawas and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and G.~B.~Mohanty and S.~Moneta and H.-G.~Moser and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and J.~Ninkovic and S.~Nishida and A.~Novosel and S.~Ogawa and Y.~Onishchuk and H.~Ono and P.~Pakhlov and G.~Pakhlova and S.~Pardi and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and L.~E.~Piilonen and G.~Pinna Angioni and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and I.~Prudiev and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and I.~Ripp-Baudot and G.~Rizzo and J.~M.~Roney and A.~Rostomyan and N.~Rout and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and B.~Scavino and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and M.~E.~Sevior and C.~Sfienti and W.~Shan and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and K.~Sumisawa and N.~Suwonjandee and H.~Svidras and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and L.~Vitale and S.~Wallner and E.~Wang and M.-Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and F.~Zeng and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range 0.62-3.50 {G}e{V} at {B}elle {II}}, year = {2024}, eprint = {2404.04915}, note = {arXiv:2404.04915v1} }
PDF
We report a measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range from 0.62 to 3.50 GeV using an initial-state radiation technique. We use an $e^+e^-$ data sample corresponding to 191 $\text{fb}^{-1}$ of integrated luminosity, collected at a center-of-mass energy at or near the $\Upsilon{(4S)}$ resonance with the Belle II detector at the SuperKEKB collider. Signal yields are extracted by fitting the two-photon mass distribution in $e^+e^- \to \pi^+\pi^-\pi^0\gamma$ events, which involve a $\pi^0 \to \gamma\gamma$ decay and an energetic photon radiated from the initial state. Signal efficiency corrections with an accuracy of 1.6% are obtained from several control data samples. The uncertainty on the cross section at the $\omega$ and $\phi$ resonances is dominated by the systematic uncertainty of 2.2%. The resulting cross sections in the 0.62-1.80 GeV energy range yield $ a_\mu^{3\pi} = [48.91 \pm 0.23~(\mathrm{stat}) \pm 1.07~(\mathrm{syst})] \times 10^{-10} $ for the leading-order hadronic vacuum polarization contribution to the muon anomalous magnetic moment. This result differs by $2.5$ standard deviations from the most precise current determination.
Angular analysis of $B \to K^* e^+ e^-$ in the low-$q^2$ region with new electron identification at Belle
Belle Collaboration, D. Ferlewicz, P. Urquijo, I. Adachi, K. Adamczyk, H. Aihara, D. M. Asner, H. Atmacan, R. Ayad, V. Babu, Sw. Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Biswas, D. Bodrov, et al (150)
Apr 02 2024 hep-ex arXiv:2404.00201v3

@misc{2404.00201, author = {Belle Collaboration and D.~Ferlewicz and P.~Urquijo and I.~Adachi and K.~Adamczyk and H.~Aihara and D.~M.~Asner and H.~Atmacan and R.~Ayad and V.~Babu and Sw.~Banerjee and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and V.~Bhardwaj and B.~Bhuyan and T.~Bilka and D.~Biswas and D.~Bodrov and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and L.~Cao and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and S.~Das and N.~Dash and G.~de Marino and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and D.~Epifanov and T.~Ferber and B.~G.~Fulsom and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and A.~B.~Kaliyar and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Konno and A.~Korobov and S.~Korpar and E.~Kou and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and T.~Lam and S.~C.~Lee and D.~Levit and P.~Lewis and L.~K.~Li and Y.~B.~Li and L.~Li Gioi and J.~Libby and D.~Liventsev and Y.~Ma and D.~Matvienko and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and I.~Nakamura and M.~Nakao and A.~Natochii and L.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and S.~Pardi and J.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and N.~Rout and G.~Russo and S.~Sandilya and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and C.~Sharma and J.-G.~Shiu and B.~Shwartz and E.~Solovieva and M.~Starič and M.~Sumihama and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and M.~Uchida and Y.~Unno and S.~Uno and Y.~Ushiroda and S.~E.~Vahsen and K.~E.~Varvell and E.~Wang and M.-Z.~Wang and S.~Watanuki and E.~Won and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and C.~Z.~Yuan and L.~Yuan and Y.~Yusa and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{A}ngular analysis of ${B} \to {K}^* e^+ e^-$ in the low-$q^2$ region with new electron identification at {B}elle}, year = {2024}, eprint = {2404.00201}, note = {arXiv:2404.00201v3} }
PDF
We perform an angular analysis of the $B\to K^* e^+ e^-$ decay for the dielectron mass squared, $q^2$, range of $0.0008$ to $1.1200 ~\text{GeV}^2 /c^4$ using the full Belle data set in the $K^{*0} \to K^+ \pi^-$ and $K^{*+} \to K_S^0 \pi^+$ channels, incorporating new methods of electron identification to improve the statistical power of the data set. This analysis is sensitive to contributions from right-handed currents from physics beyond the Standard Model by constraining the Wilson coefficients $\mathcal{C}_7^{(\prime)}$. We perform a fit to the $B\to K^* e^+ e^-$ differential decay rate and measure the imaginary component of the transversality amplitude to be $A_T^{\rm Im} = -1.27 \pm 0.52 \pm 0.12$, and the $K^*$ transverse asymmetry to be $A_T^{(2)} = 0.52 \pm 0.53 \pm 0.11$, with $F_L$ and $A_T^{\rm Re}$ fixed to the Standard Model values. The resulting constraints on the value of $\mathcal{C}_7^{\prime}$ are consistent with the Standard Model within a $2\sigma$ confidence interval.
Search for a pentaquark state decaying into $pJ/\psi$ in $\Upsilon(1,2S)$ inclusive decays at Belle
Belle Collaboration, X. Dong, H. Y. Zhang, X. L. Wang, I. Adachi, J. K. Ahn, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, R. Ayad, S. Bahinipati, Sw. Banerjee, M. Bessner, V. Bhardwaj, D. Biswas, D. Bodrov, A. Bozek, M. Bračko, P. Branchini, et al (144)
Mar 08 2024 hep-ex arXiv:2403.04340v3

@misc{2403.04340, author = {Belle Collaboration and X.~Dong and H.~Y.~Zhang and X.~L.~Wang and I.~Adachi and J.~K.~Ahn and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and R.~Ayad and S.~Bahinipati and Sw.~Banerjee and M.~Bessner and V.~Bhardwaj and D.~Biswas and D.~Bodrov and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and P.~Chang and B.~G.~Cheon and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and P.~Ecker and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and R.~Garg and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and H.~Hayashii and S.~Hazra and M.~T.~Hedges and W.-S.~Hou and C.-L.~Hsu and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and D.~Kalita and T.~Kawasaki and D.~Y.~Kim and K.-H.~Kim and Y.~J.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and T.~Kumita and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and T.~Lam and J.~S.~Lange and D.~Levit and L.~K.~Li and Y.~Li and Y.~B.~Li and L.~Li Gioi and J.~Libby and D.~Liventsev and Y.~Ma and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mussa and I.~Nakamura and T.~Nakano and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and G.~Russo and S.~Sandilya and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and C.~Sharma and J.-G.~Shiu and J.~B.~Singh and E.~Solovieva and M.~Starič and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and M.~Uchida and Y.~Unno and S.~Uno and P.~Urquijo and Y.~Usov and A.~Vinokurova and S.~Watanuki and E.~Won and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~Yook and C.~Z.~Yuan and L.~Yuan and Y.~Yusa and Z.~P.~Zhang and V.~Zhilich}, title = {{S}earch for a pentaquark state decaying into $p{J}/\psi$ in $\{U}psilon(1,2{S})$ inclusive decays at {B}elle}, year = {2024}, eprint = {2403.04340}, note = {arXiv:2403.04340v3} }
PDF
Using the data samples of 102 million $\Upsilon(1S)$ and 158 million $\Upsilon(2S)$ events collected by the Belle detector, we search for a pentaquark state in the $pJ/\psi$ final state from $\Upsilon(1,2S)$ inclusive decays. Here, the charge-conjugate $\bar{p}J/\psi$ is included. We observe clear $pJ/\psi$ production in $\Upsilon(1,2S)$ decays and measure the branching fractions to be $\mathcal{B}[\Upsilon(1S) \to pJ/\psi + anything] = [4.27 \pm 0.16(stat.) \pm 0.20(syst.)] \times 10^{-5}$ and $\mathcal{B}[\Upsilon(2S) \to pJ/\psi + anything] = [3.59 \pm 0.14(stat.) \pm 0.16(syst.)] \times 10^{-5}$. We also measure the cross section of inclusive $pJ/\psi$ production in $e^+e^-$ annihilation to be $\sigma(e^+e^- \to pJ/\psi + anything) = [57.5 \pm 2.1 (stat.) \pm 2.5(syst.)]$~fb at $\sqrt{s} = 10.52~\hbox{GeV}$ using an 89.5~fb$^{-1}$ continuum data sample. There is no significant $P_c(4312)^+$, $P_c(4440)^+$ or $P_c(4457)^+$ signal found in the $pJ/\psi$ final states in $\Upsilon(1,2S)$ inclusive decays. We determine the upper limits of $\mathcal{B}[\Upsilon(1,2S)\to P_c^{+} + anything] \cdot \mathcal{B}(P_c^{+}\to pJ/\psi)$ to be at the $10^{-6}$ level.
Search for a $\mu^+\mu^-$ resonance in four-muon final states at Belle II
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (384)
Mar 06 2024 hep-ex arXiv:2403.02841v2

@misc{2403.02841, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and G.~Inguglia and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and D.~Kalita and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and B.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova}, title = {{S}earch for a $\mu^+\mu^-$ resonance in four-muon final states at {B}elle {II}}, year = {2024}, eprint = {2403.02841}, howpublished = {Phys. Rev. D 109, 112015 (2024)}, doi = {10.1103/PhysRevD.109.112015}, note = {arXiv:2403.02841v2} }
PDF
We report on a search for a resonance $X$ decaying to a pair of muons in $e^{+}e^{-}\rightarrow \mu^+ \mu^- X$ events in the 0.212-9.000 GeV/$c^{2}$ mass range, using 178 fb$^{-1}$ of data collected by the BelleII experiment at the SuperKEKB collider at a center of mass energy of 10.58 GeV. The analysis probes two different models of $X$ beyond the standard model: a $Z^{\prime}$ vector boson in the $L_{\mu}-L_{\tau}$ model and a muonphilic scalar. We observe no evidence for a signal and set exclusion limits at the 90$\%$ confidence level on the products of cross section and branching fraction for these processes, ranging from 0.046 fb to 0.97 fb for the $L_{\mu}-L_{\tau}$ model and from 0.055 fb to 1.3 fb for the muonphilic scalar model. For masses below 6 GeV/$c^{2}$, the corresponding constraints on the couplings of these processes to the standard model range from 0.0008 to 0.039 for the $L_{\mu}-L_{\tau}$ model and from 0.0018 to 0.040 for the muonphilic scalar model. These are the first constraints on the muonphilic scalar from a dedicated search.
Measurement of $CP$ asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (433)
Mar 06 2024 hep-ex arXiv:2403.02590v1

@misc{2403.02590, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and K.~Hara and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and Y.~Kulii and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and C.~Li and L.~K.~Li and Y.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and H.~Tanigawa and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova}, title = {{M}easurement of ${CP}$ asymmetries in ${B}^0 \rightarrow {K}^0_{S} {K}^0_{S} {K}^0_{S}$ decays at {B}elle {II}}, year = {2024}, eprint = {2403.02590}, note = {arXiv:2403.02590v1} }
PDF
We report a measurement of decay-time dependent charge-parity ($CP$) asymmetries in $B^0 \rightarrow K^0_S K^0_S K^0_S$ decays. We use $387 \times 10^6 B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle II detector at the SuperKEKB asymmetric-energy electron-positron collider. We reconstruct 220 signal events and extract the $CP$-violating parameters $S$ and $C$ from a fit to the distribution of the decay-time difference between the two $B$ mesons. The resulting confidence region is consistent with previous measurements in $B^0 \rightarrow K^0_S K^0_S K^0_S$ and $B^0 \rightarrow (c\bar{c})K^0$ decays, and with predictions based on the standard model.
New graph-neural-network flavor tagger for Belle II and measurement of $\sin2\phi_1$ in $B^0 \to J/\psi K^0_\text{S}$ decays
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (396)
Feb 28 2024 hep-ex arXiv:2402.17260v2

@misc{2402.17260, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and Y.~Han and K.~Hara and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and D.~Levit and C.~Li and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Y.-R.~Lin and M.~H.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and S.~Mitra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and B.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{N}ew graph-neural-network flavor tagger for {B}elle {II} and measurement of $\sin2\phi_1$ in ${B}^0 \to {J}/\psi {K}^0_\text{{S}}$ decays}, year = {2024}, eprint = {2402.17260}, howpublished = {Phys. Rev. D 110, 012001, 2024}, doi = {10.1103/PhysRevD.110.012001}, note = {arXiv:2402.17260v2} }
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We present GFlaT, a new algorithm that uses a graph-neural-network to determine the flavor of neutral $B$ mesons produced in $\Upsilon(4S)$ decays. It improves previous algorithms by using the information from all charged final-state particles and the relations between them. We evaluate its performance using $B$ decays to flavor-specific hadronic final states reconstructed in a 362 $\text{fb}^{-1}$ sample of electron-positron collisions collected at the $\Upsilon(4S)$ resonance with the Belle II detector at the SuperKEKB collider. We achieve an effective tagging efficiency of $(37.40 \pm 0.43 \pm 0.36) \%$, where the first uncertainty is statistical and the second systematic, which is $18\%$ better than the previous Belle II algorithm. Demonstrating the algorithm, we use $B^{0}\to J/\psi K^0_\text{S}$ decays to measure the mixing-induced and direct $CP$ violation parameters, $S = (0.724 \pm 0.035 \pm 0.009)$ and $C = (-0.035 \pm 0.026 \pm 0.029)$.
Measurement of $CP$ asymmetries in $B^0\to\eta'K^0_s$ decays at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, et al (382)
Feb 07 2024 hep-ex arXiv:2402.03713v1

@misc{2402.03713, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and K.~Hara and T.~Hara and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and D.~Levit and C.~Li and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and M.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova}, title = {{M}easurement of ${CP}$ asymmetries in ${B}^0\to\eta'{K}^0_s$ decays at {B}elle {II}}, year = {2024}, eprint = {2402.03713}, note = {arXiv:2402.03713v1} }
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We describe a measurement of charge-parity ($CP$) violation asymmetries in $B^0\to\eta'K^0_S$ decays using Belle II data. We consider $\eta'\to\eta(\to\gamma\gamma)\pi^+\pi^-$ and $\eta'\to\rho(\to\pi^+\pi^-)\gamma$ decays. The data were collected at the SuperKEKB asymmetric-energy $e^+e^-$ collider between the years 2019 and 2022, and contain $(387\pm 6) \times 10^6$ bottom-antibottom meson pairs. We reconstruct $829\pm35$ signal decays and extract the $CP$ violating parameters from a fit to the distribution of the proper-decay-time difference between the two $B$ mesons. The measured direct and mixing-induced $CP$ asymmetries are $\text{C}_{\eta'K^0_S} = -0.19 \pm 0.08 \pm 0.03 $ and $\text{S}_{\eta'K^0_S} = +0.67 \pm 0.10 \pm 0.04 $, respectively, where the first uncertainties are statistical and the second are systematic. These results are in agreement with current world averages and standard model predictions.
Search for a heavy neutral lepton that mixes predominantly with the tau neutrino
Belle Collaboration, M. Nayak, S. Dey, A. Soffer, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Biswas, et al (148)
Feb 06 2024 hep-ex arXiv:2402.02580v3

@misc{2402.02580, author = {Belle Collaboration and M.~Nayak and S.~Dey and A.~Soffer and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and R.~Ayad and V.~Babu and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and M.~Bessner and V.~Bhardwaj and B.~Bhuyan and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and H.~E.~Cho and K.~Cho and Y.~Choi and S.~Choudhury and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and D.~Epifanov and T.~Ferber and O.~Fogel and B.~G.~Fulsom and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and K.~Inami and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and P.~Križan and P.~Krokovny and T.~Kuhr and D.~Kumar and R.~Kumar and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and T.~Lam and J.~S.~Lange and M.~Laurenza and S.~C.~Lee and L.~K.~Li and Y.~B.~Li and L.~Li Gioi and J.~Libby and K.~Lieret and Y.-R.~Lin and D.~Liventsev and T.~Luo and Y.~Ma and M.~Masuda and S.~K.~Maurya and F.~Meier and M.~Merola and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and I.~Nakamura and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and P.~Pakhlov and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and M.~Röhrken and A.~Rostomyan and N.~Rout and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and C.~Sharma and C.~P.~Shen and J.-G.~Shiu and J.~B.~Singh and A.~Sokolov and E.~Solovieva and M.~Starič and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and Y.~Unno and S.~Uno and Y.~Ushiroda and S.~E.~Vahsen and M.-Z.~Wang and S.~Watanuki and E.~Won and B.~D.~Yabsley and W.~Yan and J.~H.~Yin and L.~Yuan and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for a heavy neutral lepton that mixes predominantly with the tau neutrino}, year = {2024}, eprint = {2402.02580}, howpublished = {Phys.Rev.D 109 (2024) 11, L111102}, doi = {10.1103/PhysRevD.109.L111102}, note = {arXiv:2402.02580v3} }
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We report a search for a heavy neutral lepton (HNL) that mixes predominantly with $\nu_\tau$. The search utilizes data collected with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. The data sample was collected at and just below the center-of-mass energies of the $\Upsilon(4S)$ and $\Upsilon(5S)$ resonances and has an integrated luminosity of $915~\textrm{fb}^{-1}$, corresponding to $(836\pm 12)\times 10^6$ $e^+e^\to\tau^+\tau^-$ events. We search for production of the HNL (denoted $N$) in the decay $\tau^-\to \pi^- N$ followed by its decay via $N \to \mu^+\mu^- \nu_\tau$. The search focuses on the parameter-space region in which the HNL is long lived, so that the $\mu^+\mu^-$ originate from a common vertex that is significantly displaced from the collision point of the KEKB beams. Consistent with the expected background yield, one event is observed in the data sample after application of all the event-selection criteria. We report limits on the mixing parameter of the HNL with the $\tau$ neutrino as a function of the HNL mass.
Study of $\Upsilon(10753)$ decays to $\pi^{+}\pi^{-}\Upsilon(nS)$ final states at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, et al (376)
Jan 23 2024 hep-ex arXiv:2401.12021v3

@misc{2401.12021, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and D.~Levit and C.~Li and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and M.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova}, title = {{S}tudy of $\{U}psilon(10753)$ decays to $\pi^{+}\pi^{-}\{U}psilon(n{S})$ final states at {B}elle {II}}, year = {2024}, eprint = {2401.12021}, note = {arXiv:2401.12021v3} }
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We present an analysis of the process $e^{+}e^{-}\to\pi^{+}\pi^{-}\Upsilon(nS)$ (where $n$ = 1, 2, or 3) reconstructed in $19.6\rm$ $\rm fb^{-1}$ of Belle II data during a special run of the SuperKEKB collider at four energy points near the peak of the $\Upsilon(10753)$ resonance. By analyzing the mass distribution of the $\pi^+\pi^-\Upsilon(nS)$ system and the Born cross sections of the $e^{+}e^{-}\to\pi^{+}\pi^{-}\Upsilon(nS)$ process, we report the first observation of $\Upsilon(10753)$ decays to the $\pi^{+}\pi^{-}\Upsilon(1S)$ and $\pi^{+}\pi^{-}\Upsilon(2S)$ final states, and find no evidence for decays to $\pi^{+}\pi^{-}\Upsilon(3S)$. Possible intermediate states in the $\pi^+\pi^-\Upsilon(1S,2S)$ transitions are also investigated, and no evidence for decays proceeding via the $\pi^\mp Z_b^\pm$ or $f_0(980)\Upsilon(nS)$ intermediate states is found. We measure Born cross sections for the $e^{+}e^{-}\to\pi^{+}\pi^{-}\Upsilon(nS)$ process that, combined with results from Belle, improve the precision of measurements of the $\Upsilon(10753)$ mass and width by nearly a factor of two to $(10756.3\pm2.7\pm0.6)$ MeV/$c^2$ and $(29.7\pm8.5\pm1.1)$ MeV, respectively. The relative ratios of the Born cross sections at the $\Upsilon(10753)$ resonance peak are also reported for the first time.
Search for Baryon-Number-Violating Processes in $B^-$ Decays to the $\bar{\Xi}_{c}^{0} \bar{\Lambda}_{c}^{-}$ Final State
Belle Collaboration, T. Gu, V. Savinov, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, Sw. Banerjee, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, A. Bozek, et al (144)
Jan 11 2024 hep-ex arXiv:2401.04807v2

@misc{2401.04807, author = {Belle Collaboration and T.~Gu and V.~Savinov and I.~Adachi and H.~Aihara and D.~M.~Asner and H.~Atmacan and T.~Aushev and R.~Ayad and Sw.~Banerjee and K.~Belous and J.~Bennett and M.~Bessner and V.~Bhardwaj and B.~Bhuyan and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and P.~Chang and B.~G.~Cheon and K.~Chilikin and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and K.~Hayasaka and H.~Hayashii and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and K.~K.~Joo and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.~J.~Kim and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and K.~Kumara and T.~Kumita and Y.-J.~Kwon and Y.-T.~Lai and S.~C.~Lee and D.~Levit and L.~K.~Li and Y.~B.~Li and L.~Li Gioi and D.~Liventsev and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and I.~Nakamura and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and M.~Niiyama and S.~Nishida and S.~Ogawa and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and M.~Röhrken and G.~Russo and S.~Sandilya and L.~Santelj and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and C.~Sharma and J.-G.~Shiu and E.~Solovieva and M.~Starič and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and M.~Uchida and Y.~Unno and S.~Uno and Y.~Usov and S.~E.~Vahsen and K.~E.~Varvell and A.~Vinokurova and E.~Wang and M.-Z.~Wang and X.~L.~Wang and S.~Watanuki and E.~Won and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and L.~Yuan and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for {B}aryon-{N}umber-{V}iolating {P}rocesses in ${B}^-$ {D}ecays to the $\bar{\{X}i}_{c}^{0} \bar{\{L}ambda}_{c}^{-}$ {F}inal {S}tate}, year = {2024}, eprint = {2401.04807}, note = {arXiv:2401.04807v2} }
PDF
We report the results of the first search for $B^-$ decays to the $\bar{\Xi}_{c}^{0} \bar{\Lambda}_{c}^{-}$ final state using 711~${\rm fb^{-1}}$ of data collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The results are interpreted in terms of both direct baryon-number-violating $B^-$ decay and $\Xi_{c}^{0}-\bar{\Xi}_{c}^{0}$ oscillations which follow the Standard Model decay $B^- \to \Xi_{c}^{0} \bar{\Lambda}_{c}^{-}$. We observe no evidence for baryon number violation and set the 95\% confidence-level upper limits on the ratio of baryon-number-violating and Standard Model branching fractions ${\mathcal{B}(B^- \rightarrow \bar{\Xi}_{c}^{0} \bar{\Lambda}_{c}^{-})}/{\mathcal{B}(B^- \rightarrow \Xi_{c}^{0} \bar{\Lambda}_{c}^{-})}$ to be $< 2.7\%$ and on the $\Xi_{c}^{0} - \bar{\Xi}_{c}^{0}$ oscillation angular frequency $\omega$ to be $< 0.76\ \mathrm{ps}^{-1}$ (equivalent to $\tau_{\rm mix} > 1.3$~ps).
Measurements of the branching fraction, polarization, and $CP$ asymmetry for the decay $B^0\rightarrow \omega \omega$
Belle Collaboration, Y. Guan, A. J. Schwartz, K. Kinoshita, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, R. Ayad, S. Bahinipati, Sw. Banerjee, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, D. Biswas, A. Bobrov, D. Bodrov, et al (150)
Jan 10 2024 hep-ex arXiv:2401.04646v1

@misc{2401.04646, author = {Belle Collaboration and Y.~Guan and A.~J.~Schwartz and K.~Kinoshita and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and R.~Ayad and S.~Bahinipati and Sw.~Banerjee and K.~Belous and J.~Bennett and M.~Bessner and V.~Bhardwaj and B.~Bhuyan and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and A.~Budano and M.~Campajola and L.~Cao and D.~Červenkov and M.-C.~Chang and P.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and K.~Gudkova and C.~Hadjivasiliou and K.~Hayasaka and H.~Hayashii and S.~Hazra and M.~T.~Hedges and W.-S.~Hou and C.-L.~Hsu and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and K.~K.~Joo and T.~Kawasaki and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.~J.~Kim and Y.-K.~Kim and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and K.~Kumara and T.~Kumita and Y.-J.~Kwon and Y.-T.~Lai and S.~C.~Lee and D.~Levit and L.~K.~Li and Y.~Li and Y.~B.~Li and L.~Li Gioi and J.~Libby and D.~Liventsev and T.~Luo and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and I.~Nakamura and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and M.~Niiyama and S.~Nishida and S.~Ogawa and H.~Ono and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and S.~Paul and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and M.~Röhrken and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and J.-G.~Shiu and E.~Solovieva and M.~Starič and K.~Sumisawa and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and M.~Uchida and Y.~Unno and S.~Uno and P.~Urquijo and Y.~Usov and S.~E.~Vahsen and K.~E.~Varvell and A.~Vinokurova and M.-Z.~Wang and S.~Watanuki and E.~Won and X.~Xu and B.~D.~Yabsley and W.~Yan and Y.~Yook and L.~Yuan and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{M}easurements of the branching fraction, polarization, and ${CP}$ asymmetry for the decay ${B}^0\rightarrow \omega \omega$}, year = {2024}, eprint = {2401.04646}, note = {arXiv:2401.04646v1} }
PDF
We present a measurement of $B^{0} \rightarrow \omega \omega$, a charmless decay into two vector mesons, using 772 $\times 10^6$ $B\overline{B}$ pairs collected with the Belle detector at the KEKB $e^+e^-$ collider. The decay is observed with a significance of 7.9 standard deviations. We measure a branching fraction $\mathcal{B} = (1.53 \pm 0.29 \pm 0.17) \times 10^{-6}$, a fraction of longitudinal polarization $f_L = 0.87 \pm 0.13 \pm 0.13$, and a time-integrated $CP$ asymmetry $A_{CP}$ = $-0.44 \pm 0.43 \pm 0.11$, where the first uncertainties listed are statistical and the second are systematic. This is the first observation of $B^{0} \rightarrow \omega \omega$, and the first measurements of $f_L$ and $A_{CP}$ for this decay.
A test of lepton flavor universality with a measurement of $R(D^{*})$ using hadronic $B$ tagging at the Belle II experiment
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, et al (417)
Jan 08 2024 hep-ex arXiv:2401.02840v1

@misc{2401.02840, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and L.~Bierwirth and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and Y.~Han and K.~Hara and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Neu and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and K.~Smith and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and J.~Wiechczynski and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{A} test of lepton flavor universality with a measurement of ${R}({D}^{*})$ using hadronic ${B}$ tagging at the {B}elle {II} experiment}, year = {2024}, eprint = {2401.02840}, note = {arXiv:2401.02840v1} }
PDF
The ratio of branching fractions $R(D^{*}) = \mathcal{B}(\overline{B} \rightarrow D^{*} \tau^{-} \overline{\nu}_{\tau})$/$\mathcal{B} (\overline{B} \rightarrow D^{*} \ell^{-} \overline{\nu}_{\ell})$, where $\ell$ is an electron or muon, is measured using a Belle~II data sample with an integrated luminosity of $189~\mathrm{fb}^{-1}$ at the SuperKEKB asymmetric-energy $e^{+} e^{-}$ collider. Data is collected at the $\Upsilon(\mathrm{4S})$ resonance, and one $B$ meson in the $\Upsilon(\mathrm{4S})\rightarrow B\overline{B}$ decay is fully reconstructed in hadronic decay modes. The accompanying signal $B$ meson is reconstructed as $\overline{B}\rightarrow D^{*} \tau^{-}\overline{\nu}_{\tau}$ using leptonic $\tau$ decays. The normalization decay, $\overline{B}\rightarrow D^{*} \ell^{-} \overline{\nu}_{\ell}$, where $\ell$ is an electron or muon, produces the same observable final state particles. The ratio of branching fractions is extracted in a simultaneous fit to two signal-discriminating variables in both channels and yields $R(D^{*}) = 0.262~_{-0.039}^{+0.041}(\mathrm{stat})~_{-0.032}^{+0.035}(\mathrm{syst})$. This result is consistent with the current world average and with standard model predictions.
Search for the $e^+e^-\to\eta_{b}(1S)\omega$ and $e^+e^-\to\chi_{b0}(1P)\omega$ processes at $\sqrt{s}=10.745\,\mathrm{GeV}$
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, et al (402)
Dec 21 2023 hep-ex arXiv:2312.13043v1

@misc{2312.13043, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and D.~Kalita and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and Y.~Kulii and T.~Kuhr and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leitl and D.~Levit and P.~M.~Lewis and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and H.~Nakazawa and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and B.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{S}earch for the $e^+e^-\to\eta_{b}(1{S})\omega$ and $e^+e^-\to\chi_{b0}(1{P})\omega$ processes at $\sqrt{s}=10.745\,\mathrm{{G}e{V}}$}, year = {2023}, eprint = {2312.13043}, note = {arXiv:2312.13043v1} }
PDF
We search for the $e^+e^-\to\eta_b(1S)\omega$ and $e^+e^-\to\chi_{b0}(1P)\omega$ processes at a center-of-mass energy of 10.745 GeV, which is close to the peak of the $\Upsilon(10753)$ state. We use data collected by the Belle II experiment during a special run, corresponding to an integrated luminosity of $9.8\,\mathrm{fb}^{-1}$. We reconstruct $\omega\to\pi^+\pi^-\pi^0$ decays and use the $\omega$ meson's recoil mass to search for the signals. We do not find evidence for either process, and set upper limits on the corresponding Born-level cross sections of 2.5 pb and 7.8 pb, respectively, at the 90% confidence level. The $\chi_{b0}(1P)\omega$ limit is the result of a combination of this analysis and a previous search using full reconstruction.
Search for the semileptonic decays $\Xi_c^0 \to \Xi^0\ell^+\ell^-$ at Belle
Belle Collaboration, J. X. Cui, Y. B. Li, C. P. Shen, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, et al (146)
Dec 06 2023 hep-ex arXiv:2312.02580v2

@misc{2312.02580, author = {Belle Collaboration and J.~X.~Cui and Y.~B.~Li and C.~P.~Shen and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and T.~Aushev and R.~Ayad and V.~Babu and S.~Bahinipati and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and B.~Bhuyan and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and S.~Das and N.~Dash and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and R.~Garg and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and K.~Hayasaka and H.~Hayashii and S.~Hazra and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and D.~Kalita and C.~Kiesling and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and D.~Kumar and R.~Kumar and Y.-J.~Kwon and T.~Lam and S.~C.~Lee and L.~K.~Li and Y.~Li and L.~Li Gioi and J.~Libby and D.~Liventsev and Y.~Ma and M.~Masuda and D.~Matvienko and S.~K.~Maurya and F.~Meier and M.~Merola and K.~Miyabayashi and R.~Mizuk and R.~Mussa and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and P.~Pakhlov and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and M.~T.~Prim and N.~Rout and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and C.~Sharma and J.-G.~Shiu and A.~Sokolov and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and T.~Uglov and Y.~Unno and S.~Uno and Y.~Usov and A.~Vinokurova and M.-Z.~Wang and S.~Watanuki and E.~Won and B.~D.~Yabsley and W.~Yan and J.~Yelton and J.~H.~Yin and L.~Yuan and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for the semileptonic decays $\{X}i_c^0 \to \{X}i^0\ell^+\ell^-$ at {B}elle}, year = {2023}, eprint = {2312.02580}, note = {arXiv:2312.02580v2} }
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Using the full data sample of 980 $\mathrm{fb}^{-1}$ collected with the Belle detector at the KEKB asymmetric energy electron-positron collider, we report the results of the first search for the rare semileptonic decays $\Xi_c^0 \to \Xi^0\ell^+\ell^-$ ($\ell=e$ or $\mu)$. No significant signals are observed in the $\Xi^0\ell^+\ell^-$ invariant-mass distributions. Taking the decay $\Xi_c^0 \to \Xi^- \pi^+$ as the normalization mode, we report 90\% credibility upper limits on the branching fraction ratios ${\cal{B}} (\Xi_c^0 \to \Xi^0 e^+ e^-) / {\cal{B}}(\Xi_c^0\to \Xi^-\pi^+) < 6.7 \times 10^{-3}$ and ${\cal{B}} (\Xi_c^0 \to \Xi^0 \mu^+ \mu^-) / {\cal{B}}(\Xi_c^0\to \Xi^-\pi^+) < 4.3 \times 10^{-3}$ based on the phase-space assumption for signal decays. The 90\% credibility upper limits on the absolute branching fractions of ${\cal{B}} (\Xi_c^0 \to \Xi^0 e^+ e^-)$ and ${\cal{B}} (\Xi_c^0 \to \Xi^0 \mu^+ \mu^-)$ are found to be $9.9 \times 10^{-5}$ and $6.5 \times 10^{-5}$, respectively.
Evidence for $B^{+}\to K^{+}\nu\bar{\nu}$ decays
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (435)
Nov 27 2023 hep-ex arXiv:2311.14647v3

@misc{2311.14647, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Cunliffe and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and Y.~Fan and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and P.~Grace and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and Y.~Kulii and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and G.~Mancinelli and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and H.~Nakazawa and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and M.~V.~Purohit and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and Y.~Sakai and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and M.~Schnepf and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and R.~Volpe and B.~Wach and M.~Wakai and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova}, title = {{E}vidence for ${B}^{+}\to {K}^{+}\nu\bar{\nu}$ decays}, year = {2023}, eprint = {2311.14647}, howpublished = {Phys. Rev. D 109, 112006 (2024)}, doi = {10.1103/PhysRevD.109.112006}, note = {arXiv:2311.14647v3} }
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We search for the rare decay $B^{+}\rightarrow K^{+}\nu\bar{\nu}$ in a $362\ \rm{fb}^{-1}$ sample of electron-positron collisions at the $\Upsilon(4S)$ resonance collected with the Belle II detector at the SuperKEKB collider. We use the inclusive properties of the accompanying $B$ meson in $\Upsilon(4S) \to B\kern 0.18em\overline{\kern -0.18em B}{}$ events to suppress background from other decays of the signal $B$ candidate and light-quark pair production. We validate the measurement with an auxiliary analysis based on a conventional hadronic reconstruction of the accompanying $B$ meson. For background suppression, we exploit distinct signal features using machine learning methods tuned with simulated data. The signal-reconstruction efficiency and background suppression are validated through various control channels. The branching fraction is extracted in a maximum likelihood fit. Our inclusive and hadronic analyses yield consistent results for the $B^{+}\rightarrow K^{+}\nu\bar{\nu}$ branching fraction of $\left[2.7\pm 0.5(\mathrm{stat})\pm 0.5(\mathrm{syst})\right] \times 10^{-5}$ and $\left[1.1^{+0.9}_{-0.8}(\mathrm{stat}){}^{+0.8}_{-0.5}(\mathrm{syst})\right] \times 10^{-5}$, respectively. Combining the results, we determine the branching fraction of the decay $B^{+}\rightarrow K^{+}\nu\bar{\nu}$ to be $\left[2.3 \pm 0.5(\mathrm{stat})^{+0.5}_{-0.4}(\mathrm{syst})\right]\times 10^{-5}$, providing the first evidence for this decay at $3.5$ standard deviations. The combined result is $2.7$ standard deviations above the standard model expectation.
Search for the decay $B_s^0\to J/\psi\pi^0$ at Belle experiment
Belle Collaboration, D. Kumar, B. Bhuyan, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, J. Borah, M. Bračko, et al (147)
Nov 22 2023 hep-ex arXiv:2311.12724v4

@misc{2311.12724, author = {Belle Collaboration and D.~Kumar and B.~Bhuyan and H.~Aihara and D.~M.~Asner and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and S.~Das and N.~Dash and G.~De Nardo and G.~De Pietro and R.~Dhamija and Z.~Doležal and T.~V.~Dong and P.~Ecker and D.~Epifanov and D.~Ferlewicz and B.~G.~Fulsom and R.~Garg and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and K.~Gudkova and C.~Hadjivasiliou and K.~Hayasaka and H.~Hayashii and S.~Hazra and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and D.~Kalita and A.~B.~Kaliyar and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and K.~Kumara and T.~Kumita and A.~Kuzmin and Y.-J.~Kwon and T.~Lam and S.~C.~Lee and D.~Levit and L.~K.~Li and Y.~Li and Y.~B.~Li and L.~Li Gioi and J.~Libby and D.~Liventsev and Y.~Ma and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and P.~Pakhlov and G.~Pakhlova and S.~Pardi and J.~Park and S.-H.~Park and A.~Passeri and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and M.~T.~Prim and N.~Rout and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and M.~E.~Sevior and W.~Shan and C.~Sharma and C.~P.~Shen and J.-G.~Shiu and J.~B.~Singh and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and T.~Uglov and Y.~Unno and S.~Uno and Y.~Ushiroda and S.~E.~Vahsen and K.~E.~Varvell and A.~Vinokurova and D.~Wang and X.~L.~Wang and S.~Watanuki and E.~Won and B.~D.~Yabsley and W.~Yan and J.~Yelton and J.~H.~Yin and L.~Yuan and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for the decay ${B}_s^0\to {J}/\psi\pi^0$ at {B}elle experiment}, year = {2023}, eprint = {2311.12724}, howpublished = {Phys. Rev. D 109, 032007 (2024)}, doi = {10.1103/PhysRevD.109.032007}, note = {arXiv:2311.12724v4} }
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We have analyzed 121.4 fb$^{-1}$ of data collected at the $\Upsilon(5S)$ resonance by the Belle experiment using the KEKB asymmetric-energy $e^+e^-$ collider to search for the decay $B_s^0\to J/\psi\pi^0$. We observe no signal and report an upper limit on the branching fraction $\mathcal{B}(B_s^0\to J/\psi\pi^0)$ of $1.21\times 10^{-5}$ at 90\% confidence level. This result is the most stringent, improving the previous bound by two orders of magnitude.
First Measurement of $R(X_{\tau/\ell})$ as an Inclusive Test of the $b \to c \tau \nu$ Anomaly
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, J. Baudot, et al (373)
Nov 14 2023 hep-ex arXiv:2311.07248v2

@misc{2311.07248, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and L.~M.~Cremaldi and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and T.~Higuchi and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and Y.~Kulii and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and D.~Levit and P.~M.~Lewis and L.~K.~Li and Y.~Li and Y.~B.~Li and J.~Libby and M.~Liu and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Panta and S.~Pardi and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and N.~Rauls and M.~Reif and S.~Reiter and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and P.~Rocchetti and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and Y.~Sakai and D.~A.~Sanders and S.~Sandilya and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~P.~Shen and X.~D.~Shi and T.~Shillington and T.~Shimasaki and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and R.~Stroili and M.~Sumihama and K.~Sumisawa and H.~Svidras and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and S.~Watanuki and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and B.~Zhang and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova}, title = {{F}irst {M}easurement of ${R}({X}_{\tau/\ell})$ as an {I}nclusive {T}est of the $b \to c \tau \nu$ {A}nomaly}, year = {2023}, eprint = {2311.07248}, howpublished = {Phys. Rev. Lett. 132, 211804 (2024)}, doi = {10.1103/PhysRevLett.132.211804}, note = {arXiv:2311.07248v2} }
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We measure the tau-to-light-lepton ratio of inclusive $B$-meson branching fractions $R(X_{\tau/\ell}) \equiv \mathcal{B}(B\to X \tau \nu)/\mathcal{B}(B \to X \ell \nu)$, where $\ell$ indicates an electron or muon, and thereby test the universality of charged-current weak interactions. We select events that have one fully reconstructed $B$ meson and a charged lepton candidate from $189~\mathrm{fb}^{-1}$ of electron-positron collision data collected with the Belle II detector. We find $R(X_{\tau/\ell}) = 0.228 \pm 0.016~(\mathrm{stat}) \pm 0.036~(\mathrm{syst})$, in agreement with standard-model expectations. This is the first direct measurement of $R(X_{\tau/\ell})$.
Measurement of the Ratio of Partial Branching Fractions of Inclusive $\overline{B} \to X_u \ell \overline{\nu}$ to $\overline{B} \to X_{c} \ell \overline{\nu}$ and the Ratio of their Spectra with Hadronic Tagging
Belle Collaboration, M. Hohmann, P. Urquijo, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, J. Bennett, F. Bernlochner, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, D. Bodrov, G. Bonvicini, et al (140)
Nov 02 2023 hep-ex arXiv:2311.00458v1

@misc{2311.00458, author = {Belle Collaboration and M.~Hohmann and P.~Urquijo and I.~Adachi and H.~Aihara and D.~M.~Asner and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and M.~Bauer and J.~Bennett and F.~Bernlochner and M.~Bessner and B.~Bhuyan and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and G.~Bonvicini and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and L.~Cao and M.-C.~Chang and B.~G.~Cheon and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Das and N.~Dash and G.~De Nardo and G.~De Pietro and R.~Dhamija and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and T.~Ferber and D.~Ferlewicz and A.~Frey and B.~G.~Fulsom and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and K.~Gudkova and C.~Hadjivasiliou and O.~Hartbrich and K.~Hayasaka and H.~Hayashii and S.~Hazra and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and K.~Inami and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and Q.~P.~Ji and S.~Jia and Y.~Jin and T.~Kawasaki and C.~Kiesling and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and A.~Korobov and E.~Kovalenko and P.~Križan and T.~Kuhr and M.~Kumar and R.~Kumar and K.~Kumara and Y.-J.~Kwon and T.~Lam and M.~Laurenza and S.~C.~Lee and D.~Levit and P.~Lewis and L.~K.~Li and L.~Li Gioi and D.~Liventsev and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and R.~Mizuk and K.~Miyabayashi and G.~B.~Mohanty and R.~Mussa and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and M.~Röhrken and M.~Rozanska and G.~Russo and S.~Sandilya and V.~Savinov and G.~Schnell and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and K.~Senyo and W.~Shan and C.~Sharma and J.-G.~Shiu and B.~Shwartz and E.~Solovieva and M.~Starič and M.~Sumihama and K.~Sumisawa and M.~Takizawa and K.~Tanida and F.~Tenchini and K.~Trabelsi and M.~Uchida and S.~Uno and S.~E.~Vahsen and K.~E.~Varvell and A.~Vinokurova and M.-Z.~Wang and E.~Won and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and Y.~Yook and V.~Zhilich and V.~Zhukova}, title = {{M}easurement of the {R}atio of {P}artial {B}ranching {F}ractions of {I}nclusive $\overline{{B}} \to {X}_u \ell \overline{\nu}$ to $\overline{{B}} \to {X}_{c} \ell \overline{\nu}$ and the {R}atio of their {S}pectra with {H}adronic {T}agging}, year = {2023}, eprint = {2311.00458}, note = {arXiv:2311.00458v1} }
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We present a measurement of the ratio of partial branching fractions of the semi-leptonic inclusive decays, $\overline{B} \to X_{u} \ell \overline{\nu}$ to $\overline{B} \to X_{c} \ell \overline{\nu}$, where $\ell = (e, \mu)$, using the full Belle sample of $772 \times 10^{6}$ $B \kern 0.18em\overline{\kern -0.18em B}$ pairs collected at the $\Upsilon(4S)$ resonance. The ratio is measured via a two-dimensional fit to the squared four-momentum transfer to the lepton pair, and the charged lepton energy in the $B$ meson rest frame, where the latter must be larger than $1$ Ge\kern -0.1em V, covering approximately $86\%$ and $78\%$ of the $\overline{B} \to X_{u} \ell \overline{\nu}$ and $\overline{B} \to X_{c} \ell \overline{\nu}$ phase space, respectively. We find $\Delta \mathcal{B}(\overline{B} \to X_{u} \ell \overline{\nu})/ \Delta \mathcal{B}(\overline{B} \to X_{c} \ell \overline{\nu}) = 0.0196(1 \pm 8.4\%_{\rm stat} \pm 7.9\%_{\rm syst})$ where the uncertainties are statistical and systematic, respectively. In addition, we report the partial branching fractions separately for charged and neutral $B$ meson decays, and for electron and muon decay channels. We place a limit on isospin breaking in $\overline{B} \to X_{u} \ell \overline{\nu}$ decays, and find no indication of lepton flavor universality violation in either the charmed or charmless mode. Furthermore, we unfold the $\overline{B} \to X_{u} \ell \overline{\nu}$ and $\overline{B} \to X_{c} \ell \overline{\nu}$ yields and report the differential ratio in lepton energy and four-momentum transfer squared.
Measurement of Angular Coefficients of $\bar{B} \to D^* \ell \bar{\nu}_\ell$: Implications for $|V_{cb}|$ and Tests of Lepton Flavor Universality
Belle Collaboration, M. T. Prim, F. Bernlochner, F. Metzner, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, T. Bilka, D. Biswas, D. Bodrov, A. Bondar, et al (141)
Nov 01 2023 hep-ex hep-ph arXiv:2310.20286v1

@misc{2310.20286, author = {Belle Collaboration and M.~T.~Prim and F.~Bernlochner and F.~Metzner and H.~Aihara and D.~M.~Asner and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and V.~Bhardwaj and B.~Bhuyan and T.~Bilka and D.~Biswas and D.~Bodrov and A.~Bondar and J.~Borah and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and L.~Cao and D.~Červenkov and P.~Chang and B.~G.~Cheon and S.-K.~Choi and Y.~Choi and S.~Choudhury and J.~Cochran and S.~Das and N.~Dash and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and R.~Garg and V.~Gaur and A.~Giri and P.~Goldenz weig and T.~Gu and K.~Gudkova and C.~Hadjivasiliou and T.~Hara and H.~Hayashii and S.~Hazra and M.~T.~Hedges and D.~Herrmann and M.~Hernández Villanueva and W.-S.~Hou and C.-L.~Hsu and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and P.~Kodyš and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and R.~Kumar and Y.-J.~Kwon and T.~Lam and S.~C.~Lee and P.~Lewis and L.~K.~Li and L.~Li Gioi and J.~Libby and D.~Liventsev and Y.~Ma and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and F.~Meier and M.~Merola and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and I.~Nakamura and M.~Nakao and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and S.~Nishida and H.~Ono and P.~Oskin and P.~Pakhlov and G.~Pakhlova and S.-H.~Park and A.~Passeri and S.~Patra and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~Röhrken and N.~Rout and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and P.~Schmolz and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and W.~Shan and J.-G.~Shiu and J.~B.~Singh and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and Y.~Unno and S.~Uno and P.~Urquijo and Y.~Usov and S.~E.~Vahsen and K.~E.~Varvell and A.~Vossen and M.-Z.~Wang and X.~L.~Wang and E.~Won and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~H.~Yin and L.~Yuan and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{M}easurement of {A}ngular {C}oefficients of $\bar{{B}} \to {D}^* \ell \bar{\nu}_\ell$: {I}mplications for $|{V}_{cb}|$ and {T}ests of {L}epton {F}lavor {U}niversality}, year = {2023}, eprint = {2310.20286}, note = {arXiv:2310.20286v1} }
PDF
We measure the complete set of angular coefficients $J_i$ for exclusive $\bar{B} \to D^* \ell \bar{\nu}_\ell$ decays ($\ell = e, \mu$). Our analysis uses the full $711\,\mathrm{fb}^{-1}$ Belle data set with hadronic tag-side reconstruction. The results allow us to extract the form factors describing the $B \to D^*$ transition and the Cabibbo-Kobayashi-Maskawa matrix element $|V_{\rm cb}|$. Using recent lattice QCD calculations for the hadronic form factors, we find $|V_{\rm cb}| = (41.0 \pm 0.7) \times 10^3 $ using the BGL parameterization, compatible with determinations from inclusive semileptonic decays. We search for lepton flavor universality violation as a function of the hadronic recoil parameter $w$, and investigate the differences of the electron and muon angular distributions. We find no deviation from Standard Model expectations.
Search for baryon and lepton number violating decays $\boldsymbol{D \rightarrow p\ell}$
Belle Collaboration, S. Maity, R. Garg, S. Bahinipati, V. Bhardwaj, H. Aihara, S. Al Said, DM Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, J. Bennett, M. Bessner, D. Biswas, A. Bobrov, D. Bodrov, G. Bonvicini, et al (142)
Oct 12 2023 hep-ex arXiv:2310.07412v2

@misc{2310.07412, author = {Belle Collaboration and S.~Maity and R.~Garg and S.~Bahinipati and V.~Bhardwaj and H.~Aihara and S.~Al Said and DM Asner and H.~Atmacan and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and M.~Bauer and J.~Bennett and M.~Bessner and D.~Biswas and A.~Bobrov and D.~Bodrov and G.~Bonvicini and J.~Borah and M.~Bračko and P.~Branchini and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and P.~Chang and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and S.~Das and N.~Dash and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and TV Dong and P.~Ecker and D.~Epifanov and T.~Ferber and BG Fulsom and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and K.~Gudkova and C.~Hadjivasiliou and K.~Hayasaka and H.~Hayashii and S.~Hazra and W.-S.~Hou and C.-L.~Hsu and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and WW Jacobs and Y.~Jin and D.~Kalita and C.~Kiesling and CH Kim and DY Kim and K.~Kinoshita and P.~Kody\vs and A.~Korobov and S.~Korpar and P.~Križan and P.~Krokovny and M.~Kumar and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and T.~Lam and SC Lee and D.~Levit and LK Li and Y.~Li and YB Li and L.~Li Gioi and K.~Lieret and D.~Liventsev and M.~Masuda and T.~Matsuda and D.~Matvienko and SK Maurya and F.~Meier and M.~Merola and F.~Metzner and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and M.~Nakao and D.~Narwal and A.~Natochii and L.~Nayak and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and TK Pedlar and R.~Pestotnik and LE Piilonen and T.~Podobnik and S.~Prell and E.~Prencipe and MT Prim and N.~Rout and G.~Russo and Y.~Sakai and S.~Sandilya and L.~Santelj.~and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and W.~Shan and C.~Sharma and J.-G.~Shiu and E.~Solovieva and M.~Starič and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and K.~Trabelsi and M.~Uchida and T.~Uglov and Y.~Unno and S.~Uno and P.~Urquijo and Y.~Usov and K.E.~Varvell and E.~Wang and M.-Z.~Wang and S.~Watanuki and J.~Wiechczynski and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.H.Yin and L.Yuan and Z.P.Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for baryon and lepton number violating decays $\boldsymbol{{D} \rightarrow p\ell}$}, year = {2023}, eprint = {2310.07412}, note = {arXiv:2310.07412v2} }
PDF
We search for the baryon and lepton number violating charm decays, $D \rightarrow p\ell$, where $D$ is either a $D^0$ or a $\overline{D}^0$ and $\ell$ is a muon or an electron, using a data sample of $921\,\mathrm{fb}^{-1}$ collected by the Belle detector at the KEKB asymmetric energy $e^{+}e^{-}$ collider. In the absence of significant signals, we set upper limits on the branching fractions in the range $(5 - 8) \times 10^{-7}$ at a 90\% confidence level, depending on the decay mode.
Measurement of branching fractions and direct $CP$ asymmetries for $B \to K\pi$ and $B\to\pi\pi$ decays at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, et al (418)
Oct 11 2023 hep-ex arXiv:2310.06381v2

@misc{2310.06381, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and P.~Grace and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and Y.~Kulii and T.~Kuhr and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and J.~Libby and S.~Lin and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and H.~Tanigawa and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of branching fractions and direct ${CP}$ asymmetries for ${B} \to {K}\pi$ and ${B}\to\pi\pi$ decays at {B}elle {II}}, year = {2023}, eprint = {2310.06381}, howpublished = {Phys. Rev. D 109, 012001 (2024)}, doi = {10.1103/PhysRevD.109.012001}, note = {arXiv:2310.06381v2} }
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We report measurements of the branching fractions and direct $\it{CP}$ asymmetries of the decays $B^0 \to K^+ \pi^-$, $B^+ \to K^+ \pi^0$, $B^+ \to K^0 \pi^+$, and $B^0 \to K^0 \pi^0$, and use these for testing the standard model through an isospin-based sum rule. In addition, we measure the branching fraction and direct $\it{CP}$ asymmetry of the decay $B^+ \to \pi^+\pi^0$ and the branching fraction of the decay $B^0 \to \pi^+\pi^-$. The data are collected with the Belle II detector from $e^+e^-$ collisions at the $\Upsilon(4S)$ resonance produced by the SuperKEKB asymmetric-energy collider and contain $387\times 10^6$ bottom-antibottom meson pairs. Signal yields are determined in two-dimensional fits to background-discriminating variables, and range from 500 to 3900 decays, depending on the channel. We obtain $-0.03 \pm 0.13 \pm 0.04$ for the sum rule, in agreement with the standard model expectation of zero and with a precision comparable to the best existing determinations.
Determination of $|V_{cb}|$ using $\overline{B}^0\to D^{*+}\ell^-\bar\nu_\ell$ decays with Belle II
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, et al (399)
Oct 04 2023 hep-ex arXiv:2310.01170v2

@misc{2310.01170, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and H.~Junkerkalefeld and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and G.~Nazaryan and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and E.~Waheed and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{D}etermination of $|{V}_{cb}|$ using $\overline{{B}}^0\to {D}^{*+}\ell^-\bar\nu_\ell$ decays with {B}elle {II}}, year = {2023}, eprint = {2310.01170}, howpublished = {Phys.Rev.D 108 (2023) 9, 092013}, doi = {10.1103/PhysRevD.108.092013}, note = {arXiv:2310.01170v2} }
PDF
We determine the CKM matrix-element magnitude $|V_{cb}|$ using $\overline{B}^0\to D^{*+}\ell^-\bar\nu_\ell$ decays reconstructed in $189 \, \mathrm{fb}^{-1}$ of collision data collected by the Belle II experiment, located at the SuperKEKB $e^+e^-$ collider. Partial decay rates are reported as functions of the recoil parameter $w$ and three decay angles separately for electron and muon final states. We obtain $|V_{cb}|$ using the Boyd-Grinstein-Lebed and Caprini-Lellouch-Neubert parametrizations, and find $|V_{cb}|_\mathrm{BGL}=(40.57\pm 0.31 \pm 0.95\pm 0.58)\times 10^{-3}$ and $|V_{cb}|_\mathrm{CLN}=(40.13 \pm 0.27 \pm 0.93\pm 0.58 )\times 10^{-3}$ with the uncertainties denoting statistical components, systematic components, and components from the lattice QCD input, respectively. The branching fraction is measured to be ${\cal B}(\overline{B}^0\to D^{*+}\ell^-\bar\nu_\ell)=(4.922 \pm 0.023 \pm 0.220)\%$. The ratio of branching fractions for electron and muon final states is found to be $0.998 \pm 0.009 \pm 0.020$. In addition, we determine the forward-backward angular asymmetry and the $D^{*+}$ longitudinal polarization fractions. All results are compatible with lepton-flavor universality in the Standard Model.
Search for charged-lepton flavor violation in $\Upsilon(2S) \to \ell^\mp\tau^\pm$ ($\ell=e,\mu$) decays at Belle
R. Dhamija, S. Nishida, A. Giri, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, D. Biswas, D. Bodrov, J. Borah, et al (161)
Sep 07 2023 hep-ex arXiv:2309.02739v2

@misc{2309.02739, author = {R.~Dhamija and S.~Nishida and A.~Giri and I.~Adachi and H.~Aihara and D.~M.~Asner and T.~Aushev and R.~Ayad and V.~Babu and S.~Bahinipati and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and V.~Bhardwaj and D.~Biswas and D.~Bodrov and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and P.~Chang and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and S.~Das and G.~De Nardo and G.~De Pietro and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and P.~Ecker and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and R.~Garg and V.~Gaur and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and K.~Hayasaka and H.~Hayashii and S.~Hazra and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and S.~Jia and Y.~Jin and K.~K.~Joo and A.~B.~Kaliyar and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Konno and A.~Korobov and S.~Korpar and P.~Križan and P.~Krokovny and M.~Kumar and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and S.~C.~Lee and D.~Levit and P.~Lewis and L.~K.~Li and L.~Li Gioi and J.~Libby and K.~Lieret and Y.-R.~Lin and D.~Liventsev and Y.~Ma and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and I.~Nakamura and M.~Nakao and A.~Natochii and L.~Nayak and M.~Niiyama and N.~K.~Nisar and S.~Ogawa and P.~Pakhlov and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and N.~Rout and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and C.~Sharma and J.-G.~Shiu and B.~Shwartz and A.~Sokolov and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and K.~Trabelsi and M.~Uchida and T.~Uglov and Y.~Unno and S.~Uno and P.~Urquijo and S.~E.~Vahsen and K.~E.~Varvell and A.~Vinokurova and D.~Wang and E.~Wang and M.-Z.~Wang and S.~Watanuki and E.~Won and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~H.~Yin and C.~Z.~Yuan and L.~Yuan and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for charged-lepton flavor violation in $\{U}psilon(2{S}) \to \ell^\mp\tau^\pm$ ($\ell=e,\mu$) decays at {B}elle}, year = {2023}, eprint = {2309.02739}, note = {arXiv:2309.02739v2} }
PDF
We report a search for the charged-lepton flavor violation in $\Upsilon(2S) \to \ell^\mp\tau^\pm$ ($\ell=e,\mu$) decays using a $25~\fbi$ $\Upsilon(2S)$ sample collected by the Belle detector at the KEKB $e^{+}$$e^-$ asymmetric-energy collider. We find no evidence for a signal and set upper limits on the branching fractions ($\mathcal{B}$) at 90\% confidence level. We obtain the most stringent upper limits: $\mathcal{B}(\Ytomutau) < 0.23 \times 10^{-6}$ and $\mathcal{B}(\Ytoetau) < 1.12 \times 10^{-6}$.
Observation of charmed strange meson pair production in $\Upsilon(2S)$ decays and in $e^{+}e^{-}$ annihilation at $\sqrt{s} = 10.52~ \rm{GeV}$
Belle Collaboration, B. S. Gao, W. J. Zhu, X. L. Wang, I. Adachi, H. Aihara, D. M. Asner, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, T. Bilka, D. Biswas, et al (148)
Aug 21 2023 hep-ex arXiv:2308.08900v3

@misc{2308.08900, author = {Belle Collaboration and B.~S.~Gao and W.~J.~Zhu and X.~L.~Wang and I.~Adachi and H.~Aihara and D.~M.~Asner and V.~Aulchenko and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and V.~Bhardwaj and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and D.~Červenkov and M.-C.~Chang and P.~Chang and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and P.~Ecker and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Giri and E.~Graziani and T.~Gu and K.~Gudkova and C.~Hadjivasiliou and K.~Hayasaka and H.~Hayashii and S.~Hazra and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and S.~Jia and Y.~Jin and K.~K.~Joo and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Konno and A.~Korobov and S.~Korpar and P.~Križan and M.~Kumar and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and S.~C.~Lee and D.~Levit and P.~Lewis and L.~K.~Li and L.~Li Gioi and J.~Libby and K.~Lieret and D.~Liventsev and Y.~Ma and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and R.~Mizuk and I.~Nakamura and M.~Nakao and D.~Narwal and A.~Natochii and L.~Nayak and M.~Niiyama and N.~K.~Nisar and S.~Nishida and S.~Ogawa and P.~Pakhlov and G.~Pakhlova and S.~Pardi and J.~Park and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and G.~Russo and S.~Sandilya and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and C.~Sharma and J.-G.~Shiu and B.~Shwartz and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and K.~Tanida and F.~Tenchini and M.~Uchida and T.~Uglov and Y.~Unno and S.~Uno and S.~E.~Vahsen and K.~E.~Varvell and D.~Wang and E.~Wang and M.-Z.~Wang and S.~Watanuki and E.~Won and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~H.~Yin and Y.~Yook and C.~Z.~Yuan and L.~Yuan and V.~Zhilich and V.~Zhukova}, title = {{O}bservation of charmed strange meson pair production in $\{U}psilon(2{S})$ decays and in $e^{+}e^{-}$ annihilation at $\sqrt{s} = 10.52~ \rm{{G}e{V}}$}, year = {2023}, eprint = {2308.08900}, note = {arXiv:2308.08900v3} }
PDF
We observe the process $\Upsilon(2S)\to D_s^{(*)+} D_{sJ}^{-}$ and continuum production $e^+e^- \to D_s^{(*)+} D_{sJ}^- $ at $\sqrt{s} = 10.52$ GeV (and their charge conjugates) using the data samples collected by the Belle detector at KEKB, where $D_{sJ}^-$ is $D_{s1}(2536)^-$ or $D^{*}_{s2}(2573)^-$. Both $D_{sJ}^-$ states are identified through their decay into $\bar{K}\bar{D}^{(*)}$. We measure the products of branching fractions ${\cal B}(\Upsilon(2S) \to D_{s}^{(*)+} D_{sJ}^-) {\cal B}(D_{sJ}^-\to \bar{K} \bar{D}^{(*)})$ and the Born cross sections $\sigma^{\rm Born}(e^+e^- \to D_{s}^{(*)+} D_{sJ}^-) {\cal B}(D_{sJ}^-\to \bar{K} \bar{D}^{(*)})$, and then compare the ratios $R_1 \equiv {\cal B}(\Upsilon(2S)\to D_{s}^{(*)+} D_{sJ}^-)/{\cal B}(\Upsilon(2S)\to\mu^{+}\mu^-)$ for $\Upsilon(2S)$ decays and $R_2 \equiv \sigma^{\rm Born}(e^+e^-\to D_{s}^{(*)+}D_{sJ}^-)/\sigma^{\rm Born}(e^+e^-\to \mu^{+}\mu^-)$ for continuum production. We obtain $R_1/R_2 = 9.7\pm 2.3 \pm 1.1$, $6.8 \pm 2.1 \pm 0.8$, $10.2 \pm 3.3 \pm 2.5$, and $3.4 \pm 2.1 \pm 0.5$ for the $D_s^+ D_{s1}(2536)^-$, $D_s^{*+} D_{s1}(2536)^-$, $D_s^+ D_{s2}^{*}(2573)^{-}$, and $D_s^{*+} D_{s2}^{*}(2573)^{-}$ final states in the $D_{sJ}^-\to K^{-} \bar{D}^{(*)0}$ modes, respectively. Therefore, the strong decay is expected to dominate in the $\Upsilon(2S)\to D_{s}^{(*)+}D_{sJ}^-$ processes. We also measure the ratios of branching fractions ${\cal B}(D_{s1}(2536)^-\to K_S^0 D^{*}(2010)^{-})/{\cal B}(D_{s1}(2536)^-\to K^{-} D^{*}(2007)^0) = 0.48 \pm 0.07 \pm 0.02$ and ${\cal B}(D_{s2}^{*}(2573)^- \to K_S^0 D^-)/{\cal B}(D_{s2}^{*}(2573)^- \to K^{-}D^0) = 0.49 \pm 0.10 \pm 0.02$, which are consistent with isospin symmetry. The second ratio is the first measurement of this quantity. Here, the first uncertainties are statistical and the second are systematic.
Measurement of branching-fraction ratios and $CP$ asymmetries in $B^{\pm} \to D_{CP\pm}K^{\pm}$ decays at Belle and Belle II
Belle, Belle II Collaborations, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, et al (409)
Aug 10 2023 hep-ex arXiv:2308.05048v2

@misc{2308.05048, author = {Belle and Belle II Collaborations and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and K.~Belous and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and T.~Czank and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and H.~Junkerkalefeld and H.~Kakuno and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and J.~Li and L.~K.~Li and Y.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and T.~Nakano and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and G.~Nazaryan and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and G.~Schnell and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and S.~Uehara and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and D.~Wang and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of branching-fraction ratios and ${CP}$ asymmetries in ${B}^{\pm} \to {D}_{{CP}\pm}{K}^{\pm}$ decays at {B}elle and {B}elle {II}}, year = {2023}, eprint = {2308.05048}, note = {arXiv:2308.05048v2} }
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We report results from a study of $B^\pm \rightarrow DK^\pm$ decays followed by $D$ decaying to $CP$~eigenstates, where $D$ indicates a $D^0$ or $\bar{D}^{0}$ meson. These decays are sensitive to the Cabibbo-Kobayashi-Maskawa unitarity-triangle angle $\phi_{3}$. The results are based on a combined analysis of the final data set of $772 \times 10^6~B\bar{B}$ pairs collected by the Belle experiment and a data set of $198 \times 10^6~B\bar{B}$ pairs collected by the Belle~II experiment, both in electron-positron collisions at the $\Upsilon(4S)$ resonance. We measure the $CP$ asymmetries to be $\mathcal{ A}_{CP +} =~(+12.5 \pm 5.8 \pm 1.4)\% $ and $\mathcal{ A}_{CP -} =~(-16.7 \pm 5.7 \pm 0.6)\%$, and the ratios of branching fractions to be $\mathcal{ R}_{CP+}=~1.164 \pm 0.081 \pm 0.036 $ and $\mathcal{ R}_{CP-} =~1.151 \pm 0.074 \pm 0.019$. The first contribution to the uncertainties is statistical, and the second is systematic. The asymmetries $\mathcal{A}_{CP +}$ and $\mathcal{A}_{CP -}$ have similar magnitudes and opposite signs; their difference corresponds to 3.5~standard deviations. From these values we calculate 68.3\% confidence intervals of ($8.5^{\circ}<\phi_{3}<16.5^{\circ}$) or ($84.5^{\circ}<\phi_{3}<95.5^{\circ}$) or ($163.3^{\circ}<\phi_{3}<171.5^{\circ}$) and $0.321<r_{B}<0.465$.
Tests of light-lepton universality in angular asymmetries of $B^0 \to D^{*-} \ell \nu$ decays
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, et al (399)
Aug 07 2023 hep-ex arXiv:2308.02023v3

@misc{2308.02023, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and A.~Heidelbach and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and H.~Junkerkalefeld and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and G.~Nazaryan and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and E.~Waheed and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{T}ests of light-lepton universality in angular asymmetries of ${B}^0 \to {D}^{*-} \ell \nu$ decays}, year = {2023}, eprint = {2308.02023}, howpublished = {Phys. Rev. Lett. 131, 181801 (Published 31 October 2023)}, doi = {10.1103/PhysRevLett.131.181801}, note = {arXiv:2308.02023v3} }
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We present the first comprehensive tests of light-lepton universality in the angular distributions of semileptonic $B^0$-meson decays to charged spin-1 charmed mesons. We measure five angular-asymmetry observables as functions of the decay recoil that are sensitive to lepton-universality-violating contributions. We use events where one neutral $B$ is fully reconstructed in $\Upsilon\left(4S\right)\to{}B \overline{B}$ decays in data corresponding to $189~\mathrm{fb}^{-1}$ integrated luminosity from electron-positron collisions collected with the Belle II detector. We find no significant deviation from the standard model expectations.
Measurement of $CP$ asymmetries in $B^0\to \phi K^0_S$ decays with Belle II
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, et al (415)
Jul 07 2023 hep-ex arXiv:2307.02802v2

@misc{2307.02802, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and V.~Chekelian and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and K.~Hara and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and P.~Horak and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and Y.~Kulii and T.~Kuhr and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and M.~J.~Lee and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and M.~Schnepf and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and H.~Tanigawa and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova}, title = {{M}easurement of ${CP}$ asymmetries in ${B}^0\to \phi {K}^0_{S}$ decays with {B}elle {II}}, year = {2023}, eprint = {2307.02802}, howpublished = {Phys. Rev. D 108, 072012 (2023)}, doi = {10.1103/PhysRevD.108.072012}, note = {arXiv:2307.02802v2} }
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We present a measurement of time-dependent rate asymmetries in $B^0\to \phi K^0_S$ decays to search for non-standard-model physics in $b\to q \overline{q}s$ transitions. The data sample is collected with the Belle II detector at the SuperKEKB asymmetric-energy $e^{+}e^{-}$ collider in 2019-2022 and contains $(387\pm 6)\times 10^6$ bottom-antibottom mesons from $\Upsilon(4S)$ resonance decays. We reconstruct $162\pm17$ signal events and extract the charge-parity ($CP$) violating parameters from a fit to the distribution of the proper-decay-time difference of the two $B$ mesons. The measured direct and mixing-induced $CP$ asymmetries are $A=0.31\pm0.20\pm0.05$ and $S=0.54\pm0.26^{+0.06}_{-0.08}$, respectively, where the first uncertainties are statistical and the second are systematic. The results are compatible with the $CP$ asymmetries observed in $b\to c\overline{c} s$ transitions.
Search for a $\tau^+\tau^-$ resonance in $e^{+}e^{-}\rightarrow \mu^{+}\mu^{-} \tau^+\tau^-$ events with the Belle II experiment
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, et al (447)
Jun 22 2023 hep-ex arXiv:2306.12294v2

@misc{2306.12294, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and P.~K.~Behera and J.~V.~Bennett and E.~Bernieri and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and V.~Bhardwaj and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and Y.~Q.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and D.~Cinabro and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Cunliffe and T.~Czank and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and J.~Guilliams and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and H.~Hirata and M.~Hoek and M.~Hohmann and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and R.~Karl and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~B.~Li and J.~Libby and K.~Lieret and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and H.~Nakayama and H.~Nakazawa and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and A.~Ramirez Morales and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and D.~Rodríguez Pérez and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and M.~Schnepf and J.~Schueler and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and S.~Y.~Suzuki and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and H.~Tanigawa and F.~Tenchini and A.~Thaller and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and A.~Vossen and B.~Wach and M.~Wakai and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and H.~Ye and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and Y.~Zhai and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{S}earch for a $\tau^+\tau^-$ resonance in $e^{+}e^{-}\rightarrow \mu^{+}\mu^{-} \tau^+\tau^-$ events with the {B}elle {II} experiment}, year = {2023}, eprint = {2306.12294}, howpublished = {Phys. Rev. Lett. 131, 121802 (2023)}, doi = {10.1103/PhysRevLett.131.121802}, note = {arXiv:2306.12294v2} }
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We report the first search for a non-standard-model resonance decaying into $\tau$ pairs in $e^{+}e^{-}\rightarrow \mu^{+}\mu^{-} \tau^+\tau^-$ events in the 3.6-10 GeV/$c^{2}$ mass range. We use a 62.8 fb$^{-1}$ sample of $e^+e^-$ collisions collected at a center-of-mass energy of 10.58 GeV by the Belle II experiment at the SuperKEKB collider. The analysis probes three different models predicting a spin-1 particle coupling only to the heavier lepton families, a Higgs-like spin-0 particle that couples preferentially to charged leptons (leptophilic scalar), and an axion-like particle, respectively. We observe no evidence for a signal and set exclusion limits at 90% confidence level on the product of cross section and branching fraction into $\tau$ pairs, ranging from 0.7 fb to 24 fb, and on the couplings of these processes. We obtain world-leading constraints on the couplings for the leptophilic scalar model for masses above 6.5 GeV/$c^2$ and for the axion-like particle model over the entire mass range.
Search for a long-lived spin-0 mediator in $b\to s$ transitions at the Belle II experiment
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, et al (394)
Jun 06 2023 hep-ex arXiv:2306.02830v2

@misc{2306.02830, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and T.~Grammatico and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and G.~Nazaryan and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and L.~Zani and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{S}earch for a long-lived spin-0 mediator in $b\to s$ transitions at the {B}elle {II} experiment}, year = {2023}, eprint = {2306.02830}, howpublished = {Phys.Rev.D 108 (2023) L111104, 2023}, doi = {10.1103/PhysRevD.108.L111104}, note = {arXiv:2306.02830v2} }
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Additional spin-0 particles appear in many extensions of the standard model. We search for long-lived spin-0 particles $S$ in $B$-meson decays mediated by a $b\to s$ quark transition in $e^+e^-$ collisions at the $\Upsilon(4S)$ resonance at the Belle II experiment. Based on a sample corresponding to an integrated luminosity of $189 \mathrm{\,fb}^{-1}$, we observe no evidence for signal. We set model-independent upper limits on the product of branching fractions $\mathrm{Br}(B^0\to K^*(892)^0(\to K^+\pi^-)S)\times \mathrm{Br}(S\to x^+x^-)$ and $\mathrm{Br}(B^+\to K^+S)\times \mathrm{Br}(S\to x^+x^-)$, where $x^+x^-$ indicates $e^+e^-, \mu^+\mu^-, \pi^+\pi^-$, or $K^+K^-$, as functions of $S$ mass and lifetime at the level of $10^{-7}$.
Measurement of $C\!P$ asymmetries and branching-fraction ratios for $B^\pm \to DK^\pm$ and $D\pi^\pm$ with $D\to K^0_{\rm S} K^\pm\pi^\mp$ using Belle and Belle II data
Belle, Belle II Collaboration, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, T. Aushev, V. Aushev, M. Aversano, R. Ayad, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, et al (390)
Jun 06 2023 hep-ex arXiv:2306.02940v2

@misc{2306.02940, author = {Belle and Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and T.~Aushev and V.~Aushev and M.~Aversano and R.~Ayad and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and S.~Hazra and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and H.~Junkerkalefeld and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and C.~Marinas and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and G.~Nazaryan and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and G.~Schnell and M.~Schnepf and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of ${C}\!{P}$ asymmetries and branching-fraction ratios for ${B}^\pm \to {DK}^\pm$ and ${D}\pi^\pm$ with ${D}\to {K}^0_{\rm {S}} {K}^\pm\pi^\mp$ using {B}elle and {B}elle {II} data}, year = {2023}, eprint = {2306.02940}, howpublished = {Journal of High Energy Physics 09(2023)146}, doi = {10.1007/JHEP09(2023)146}, note = {arXiv:2306.02940v2} }
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We measure $C\!P$ asymmetries and branching-fraction ratios for $B^\pm \to DK^\pm$ and $D\pi^\pm$ decays with $D\to K^0_{\rm S} K^\pm\pi^\mp$, where $D$ is a superposition of $D^0$ and $\bar{D}^0$. We use the full data set of the Belle experiment, containing $772\times 10^6~B\bar{B}$ pairs, and data from the Belle~II experiment, containing $387\times 10^6~B\bar{B}$ pairs, both collected in electron-positron collisions at the $\Upsilon(4S)$ resonance. Our results provide model-independent information on the unitarity triangle angle $\phi_3$.
Precise measurement of the $D^+_s$ lifetime at Belle II
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, M. Bauer, et al (342)
Jun 02 2023 hep-ex arXiv:2306.00365v2

@misc{2306.00365, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and D.~Bodrov and A.~Bondar and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and P.~Cheema and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and S.~Das and F.~Dattola and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and D.~Epifanov and P.~Feichtinger and D.~Ferlewicz and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and W.~Gradl and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and Y.~Han and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and I.~Heredia de la Cruz and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and A.~B.~Kaliyar and J.~Kandra and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and L.~K.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and G.~Nazaryan and N.~K.~Nisar and S.~Nishida and H.~Ono and F.~Otani and E.~R.~Oxford and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and Z.~S.~Stottler and R.~Stroili and M.~Sumihama and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and O.~Tittel and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and R.~Volpe and B.~Wach and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and Y.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{P}recise measurement of the ${D}^+_s$ lifetime at {B}elle {II}}, year = {2023}, eprint = {2306.00365}, howpublished = {Phys. Rev. Lett. 131, 171803 (2023)}, doi = {10.1103/PhysRevLett.131.171803}, note = {arXiv:2306.00365v2} }
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We measure the lifetime of the $D_s^+$ meson using a data sample of 207 fb$^{-1}$ collected by the Belle II experiment running at the SuperKEKB asymmetric-energy $e^+ e^-$ collider. The lifetime is determined by fitting the decay-time distribution of a sample of $116\times 10^3$ $D_s^+\rightarrow\phi\pi^+$ decays. Our result is $\tau^{}_{D^+_s} = (499.5\pm 1.7\pm 0.9)$ fs, where the first uncertainty is statistical and the second is systematic. This result is significantly more precise than previous measurements.
Evidence for $B^0 \to p\bar{\Sigma}^0\pi^-$ at Belle
Belle Collaboration, C.-Y. Chang, M.-Z. Wang, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, T. Bilka, D. Biswas, et al (175)
May 31 2023 hep-ex arXiv:2305.18821v2

@misc{2305.18821, author = {Belle Collaboration and C.-Y.~Chang and M.-Z.~Wang and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and J.~Bennett and F.~Bernlochner and M.~Bessner and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and G.~Bonvicini and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and L.~Cao and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and Z.~Doležal and T.~V.~Dong and S.~Dubey and P.~Ecker and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and Y.~Iwasaki and W.~W.~Jacobs and S.~Jia and Y.~Jin and K.~K.~Joo and A.~B.~Kaliyar and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and T.~Lam and M.~Laurenza and S.~C.~Lee and D.~Levit and L.~K.~Li and L.~Li Gioi and J.~Libby and K.~Lieret and Y.-R.~Lin and D.~Liventsev and Y.~Ma and M.~Masuda and D.~Matvienko and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and R.~Mizuk and R.~Mussa and I.~Nakamura and M.~Nakao and A.~Natochii and L.~Nayak and N.~K.~Nisar and S.~Nishida and K.~Ogawa and S.~Ogawa and H.~Ono and P.~Oskin and P.~Pakhlov and G.~Pakhlova and S.~Pardi and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and N.~Rout and G.~Russo and S.~Sandilya and A.~Sangal and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and M.~Shapkin and C.~Sharma and J.-G.~Shiu and J.~B.~Singh and A.~Sokolov and E.~Solovieva and M.~Starič and J.~F.~Strube and M.~Sumihama and W.~Sutcliffe and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and M.~Uchida and Y.~Unno and S.~Uno and Y.~Usov and S.~E.~Vahsen and G.~Varner and K.~E.~Varvell and D.~Wang and E.~Wang and S.~Watanuki and O.~Werbycka and E.~Won and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~H.~Yin and C.~Z.~Yuan and L.~Yuan and Y.~Yusa and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{E}vidence for ${B}^0 \to p\bar{\{S}igma}^0\pi^-$ at {B}elle}, year = {2023}, eprint = {2305.18821}, note = {arXiv:2305.18821v2} }
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We search for the $B^0\to p\bar{\Sigma}^0\pi^-$ decay with $\bar{\Sigma}^0 \to \bar{\Lambda}\gamma$, where the $\gamma$ is not measured, using a data sample corresponding to an integrated luminosity of 711 $\rm{fb^{-1}}$ which contains 772 $\times$ $10^{6}$ $B\bar{B}$ pairs, collected around the $\Upsilon$(4S) resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. We measure for the first time the $B^0\to p\bar{\Sigma}^0\pi^-$ branching fraction to be $\mathcal{B}(B^0 \to p \bar\Sigma^0 \pi^-) = (1.17^{+0.43}_{-0.40}(\text{stat})\pm 0.07(\text{syst})) \times 10^{-6}$ with a significance of $3.0\sigma$. We simultaneously measure the branching fraction for the related channel $B^{0}\to p\bar{\Lambda}\pi^{-}$ with much improved precision.
Measurement of the $\tau$-lepton mass with the Belle~II experiment
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, et al (401)
May 31 2023 hep-ex arXiv:2305.19116v1

@misc{2305.19116, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and F.~Becherer and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and H.~Ghumaryan and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and O.~Gogota and P.~Goldenzweig and P.~Grace and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and C.-L.~Hsu and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and Y.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and H.~Ono and Y.~Onuki and P.~Oskin and F.~Otani and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and M.~Veronesi and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and R.~Volpe and B.~Wach and M.~Wakai and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of the $\tau$-lepton mass with the {B}elle~{II} experiment}, year = {2023}, eprint = {2305.19116}, note = {arXiv:2305.19116v1} }
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We present a measurement of the $\tau$-lepton mass using a sample of about 175 million $e^+e^- \to \tau^+\tau^-$ events collected with the Belle II detector at the SuperKEKB $e^+e^-$ collider at a center-of-mass energy of $10.579\,\mathrm{Ge\kern -0.1em V}$. This sample corresponds to an integrated luminosity of $190\,\mathrm{fb^{-1}}$. We use the kinematic edge of the $\tau $ pseudomass distribution in the decay ${\tau^-\to\pi^-\pi^+\pi^-\nu_\tau}$ and measure the $\tau$ mass to be $1777.09 \pm 0.08 \pm 0.11 \,\mathrm{Me\kern -0.1em V\!/c^2}$, where the first uncertainty is statistical and the second systematic. This result is the most precise to date.
Search for the double-charmonium state with $\eta_c J/\psi$ at Belle
Belle Collaboration, J. H. Yin, Y. B. Li, E. Won, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, D. Bodrov, G. Bonvicini, et al (163)
May 30 2023 hep-ex arXiv:2305.17947v4

@misc{2305.17947, author = {Belle Collaboration and J.~H.~Yin and Y.~B.~Li and E.~Won and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and T.~Bilka and D.~Biswas and D.~Bodrov and G.~Bonvicini and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and J.~Cochran and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and T.~Hara and K.~Hayasaka and H.~Hayashii and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and J.~Kahn and A.~B.~Kaliyar and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and R.~Kumar and K.~Kumara and T.~Lam and J.~S.~Lange and S.~C.~Lee and L.~K.~Li and Y.~Li and J.~Libby and K.~Lieret and Y.-R.~Lin and D.~Liventsev and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and I.~Nakamura and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and N.~Rout and G.~Russo and S.~Sandilya and A.~Sangal and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and W.~Shan and M.~Shapkin and C.~Sharma and J.-G.~Shiu and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and M.~Uchida and T.~Uglov and Y.~Unno and S.~Uno and Y.~Usov and S.~E.~Vahsen and G.~Varner and A.~Vinokurova and D.~Wang and E.~Wang and M.-Z.~Wang and X.~L.~Wang and S.~Watanuki and O.~Werbycka and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~Yelton and Y.~Yook and C.~Z.~Yuan and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for the double-charmonium state with $\eta_c {J}/\psi$ at {B}elle}, year = {2023}, eprint = {2305.17947}, note = {arXiv:2305.17947v4} }
PDF
We measure the cross section of $e^+e^-\rightarrow\eta_c J/\psi$ at the $\Upsilon(nS) (n=1$ -- $5)$ on-resonance and 10.52 GeV off-resonance energy points using the full data sample collected by the Belle detector with an integrated luminosity of $955~\rm fb^{-1}$. We also search for double charmonium production in $e^+e^-\rightarrow\eta_c J/\psi$ via initial state radiation near the $\eta_c J/\psi$ threshold. No evident signal of the double charmonium state is found, but evidence for the $e^+e^-\rightarrow\eta_c J/\psi$ process is found with a statistical significance greater than $3.3\sigma$ near the $\eta_c J/\psi$ threshold. The average cross section near the threshold is measured and upper limits of cross sections are set for other regions.
Search for $C\!P$ violation using $T$-odd correlations in $D_{(s)}^{+}\to K^{+} K^{-}\pi^{+}\pi^{0}$, $D_{(s)}^{+}\to K^{+} \pi^{-}\pi^{+}\pi^{0}$, and $D^{+}\to K^{-}\pi^{+}\pi^{+}\pi^{0}$ decays
Belle Collaboration, L. K. Li, A. J. Schwartz, E. Won, K. Kinoshita, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, V. Aulchenko, T. Aushev, V. Babu, Sw. Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, T. Bilka, D. Biswas, A. Bobrov, et al (157)
May 23 2023 hep-ex arXiv:2305.12806v1

@misc{2305.12806, author = {Belle Collaboration and L.~K.~Li and A.~J.~Schwartz and E.~Won and K.~Kinoshita and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and V.~Aulchenko and T.~Aushev and V.~Babu and Sw.~Banerjee and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and G.~Bonvicini and J.~Borah and M.~Bračko and P.~Branchini and A.~Budano and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and J.~Cochran and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and S.~Dubey and D.~Epifanov and A.~Frey and B.~G.~Fulsom and V.~Gaur and A.~Giri and P.~Goldenzweig and G.~Gong and E.~Graziani and D.~Greenwald and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and T.~Hara and K.~Hayasaka and H.~Hayashii and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and J.~Kahn and A.~B.~Kaliyar and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.~J.~Kim and Y.-K.~Kim and H.~Kindo and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and M.~Kumar and R.~Kumar and K.~Kumara and Y.-J.~Kwon and Y.~T.~Lai and T.~Lam and S.~C.~Lee and Y.~Li and J.~Libby and K.~Lieret and Y.-R.~Lin and D.~Liventsev and Y.~Ma and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and R.~Mizuk and G.~B.~Mohanty and M.~Nakao and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and G.~Russo and S.~Sandilya and A.~Sangal and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and M.~E.~Sevior and W.~Shan and M.~Shapkin and C.~Sharma and J.-G.~Shiu and B.~Shwartz and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and M.~Takizawa and K.~Tanida and F.~Tenchini and M.~Uchida and T.~Uglov and Y.~Unno and K.~Uno and S.~Uno and G.~Varner and K.~E.~Varvell and A.~Vinokurova and D.~Wang and E.~Wang and X.~L.~Wang and S.~Watanuki and O.~Werbycka and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~H.~Yin and Y.~Yook and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for ${C}\!{P}$ violation using ${T}$-odd correlations in ${D}_{(s)}^{+}\to {K}^{+} {K}^{-}\pi^{+}\pi^{0}$, ${D}_{(s)}^{+}\to {K}^{+} \pi^{-}\pi^{+}\pi^{0}$, and ${D}^{+}\to {K}^{-}\pi^{+}\pi^{+}\pi^{0}$ decays}, year = {2023}, eprint = {2305.12806}, note = {arXiv:2305.12806v1} }
PDF
We search for $C\!P$ violation using $T$-odd correlations in five $D_{(s)}^{+}$ and $D_{(s)}^{-}$ four-body decays. Our analysis is based on 980 $\rm fb^{-1}$ of data collected by the Belle detector at the KEKB energy-asymmetric $e^+e^-$ collider. Our results for the $T$-odd $C\!P$-violating parameter $a^{T\text{-odd}}_{C\!P}$ are: $a^{T\text{-odd}}_{C\!P}({D^{+}\to K^{-}K^{+}\pi^{+}\pi^{0}}) = (+2.6\pm 6.6\pm 1.3 )\times10^{-3}$, $a^{T\text{-odd}}_{C\!P}({D^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0}}) = (-1.3\pm 4.2\pm 0.1 )\times10^{-2}$, $a^{T\text{-odd}}_{C\!P}({D^{+}\to K^{-}\pi^{+}\pi^{+}\pi^{0}}) = (+0.2\pm 1.5\pm 0.8 )\times10^{-3}$, $a^{T\text{-odd}}_{C\!P}({D_s^{+}\to K^{+}\pi^{-}\pi^{+}\pi^{0}}) = (-1.1\pm 2.2\pm 0.1 )\times10^{-2}$, and $a^{T\text{-odd}}_{C\!P}({D_s^{+}\to K^{-}K^{+}\pi^{+}\pi^{0}}) = (+2.2\pm 3.3\pm 4.3 )\times10^{-3}$, where the uncertainties are statistical and systematic, respectively. These results are the first such measurements and are all consistent with zero. They include the first measurement for a $D^+_s$ singly Cabibbo-suppressed decay, and the first measurement for a $D$ meson doubly Cabibbo-suppressed decay. We also measure $a^{T\text{-odd}}_{C\!P}$ in different subregions of phase space, where the decays are dominated by different intermediate resonance states such as $D^+\to\phi\rho^+$, $\bar{K}^{*0}K^{*+}$, and $\bar{K}^{*0}\rho^+$; and $D_s^+\to K^{*+}\rho^{0}$, $K^{*0}\rho^{+}$, $\phi\rho^+$, and $\bar{K}^{*0}K^{*+}$. No evidence for $C\!P$ violation is found.
Search for $CP$ violation in $D^{+}_{(s)}\rightarrow K^{+}K^{0}_{S}h^{+}h^{-}$ $(h=K,\pi)$ decays and observation of the Cabibbo-suppressed decay $D^{+}_{s}\rightarrow K^{+}K^{-}K^{0}_{S}\pi^{+}$
Belle Collaboration, H. K. Moon, E. Won, I. Adachi, H. Aihara, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, M. Bessner, V. Bhardwaj, B. Bhuyan, et al (188)
May 22 2023 hep-ex arXiv:2305.11405v2

@misc{2305.11405, author = {Belle Collaboration and H.~K.~Moon and E.~Won and I.~Adachi and H.~Aihara and D.~M.~Asner and H.~Atmacan and V.~Aulchenko and T.~Aushev and R.~Ayad and V.~Babu and S.~Bahinipati and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and V.~Bhardwaj and B.~Bhuyan and D.~Biswas and D.~Bodrov and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and Y.~Choi and S.~Choudhury and D.~Cinabro and J.~Cochran and S.~Das and N.~Dash and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and D.~Dossett and S.~Dubey and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and R.~Garg and V.~Gaur and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and T.~Hara and K.~Hayasaka and H.~Hayashii and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and S.~Jia and Y.~Jin and K.~K.~Joo and A.~B.~Kaliyar and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and K.~Lalwani and J.~S.~Lange and S.~C.~Lee and J.~Li and L.~K.~Li and Y.~Li and J.~Libby and K.~Lieret and Y.-R.~Lin and D.~Liventsev and T.~Luo and Y.~Ma and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and I.~Nakamura and M.~Nakao and H.~Nakazawa and A.~Natochii and L.~Nayak and N.~K.~Nisar and S.~Nishida and K.~Ogawa and S.~Ogawa and H.~Ono and P.~Oskin and P.~Pakhlov and G.~Pakhlova and T.~Pang and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and A.~Rabusov and M.~Röhrken and A.~Rostomyan and N.~Rout and G.~Russo and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and K.~Senyo and M.~E.~Sevior and M.~Shapkin and C.~Sharma and C.~P.~Shen and J.-G.~Shiu and A.~Sokolov and E.~Solovieva and M.~Starič and M.~Sumihama and T.~Sumiyoshi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and K.~Trabelsi and M.~Uchida and T.~Uglov and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and S.~E.~Vahsen and R.~van Tonder and G.~Varner and K.~E.~Varvell and A.~Vinokurova and D.~Wang and M.-Z.~Wang and M.~Watanabe and S.~Watanuki and J.~Wiechczynski and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~Yook and C.~Z.~Yuan and L.~Yuan and Y.~Yusa and Y.~Zhai and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}earch for ${CP}$ violation in ${D}^{+}_{(s)}\rightarrow {K}^{+}{K}^{0}_{{S}}h^{+}h^{-}$ $(h={K},\pi)$ decays and observation of the {C}abibbo-suppressed decay ${D}^{+}_{s}\rightarrow {K}^{+}{K}^{-}{K}^{0}_{{S}}\pi^{+}$}, year = {2023}, eprint = {2305.11405}, note = {arXiv:2305.11405v2} }
PDF
We search for $CP$ violation by measuring a $T$-odd asymmetry in the Cabibbo-suppressed $D^{+}\rightarrow K^{+}K^{0}_{S}\pi^{+}\pi^{-} $ decay, and in the Cabibbo-favored $D^{+}_{s}\rightarrow K^{+}K^{0}_{S}\pi^{+}\pi^{-}$ and $D^{+}\rightarrow K^{+}K^{-}K^{0}_{S}\pi^{+}$ decays. We use 980 ${\rm fb}^{-1}$ of data collected by the Belle detector running at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. The $C\!P$-violating $T$-odd parameter ${a}^{T\text{-}\rm{odd}}_{CP}$ is measured to be ${a}^{T\text{-}\rm{odd}}_{CP}(D^{+}\rightarrow K^{+}K^{0}_{S}\pi^{+}\pi^{-})=(0.34\pm0.87\pm0.32)\%,$ ${a}^{T\text{-}\rm{odd}}_{CP}(D^{+}_{s}\rightarrow K^{+}K^{0}_{S}\pi^{+}\pi^{-})=(-0.46\pm0.63\pm0.38)\%,$ and ${a}^{T\text{-}\rm{odd}}_{CP}(D^{+}\rightarrow K^{+}K^{-}K^{0}_{S}\pi^{+})=(-3.34\pm2.66\pm0.35)\%,$ where the first uncertainty is statistical and the second is systematic. We also report the first observation of the Cabibbo-suppressed decay $D^{+}_{s}\rightarrow K^{+}K^{-}K^{0}_{S}\pi^{+}$. The branching fraction is measured relative to that of the analogous Cabibbo-favored decay : $B(D^{+}_{s}\rightarrow K^{+}K^{-}K^{0}_{S}\pi^{+}) / B(D^{+}_{s}\rightarrow K^{+}K^{0}_{S}\pi^{+}\pi^{-}) = (1.36\pm 0.15\pm 0.04)\%$.
Measurement of the $e^+e^- \to B_s^0 \bar{B}_s^0 X$ cross section in the energy range from $10.63$ to $11.02$ GeV using inclusive $D_s^{\pm}$ and $D^0$ production
Belle Collaboration, V. Zhukova, R. Mizuk, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, M. Bauer, P. Behera, K. Belous, J. Bennett, F. Bernlochner, M. Bessner, T. Bilka, et al (171)
May 18 2023 hep-ex arXiv:2305.10098v2

@misc{2305.10098, author = {Belle Collaboration and V.~Zhukova and R.~Mizuk and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and V.~Aulchenko and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and M.~Bauer and P.~Behera and K.~Belous and J.~Bennett and F.~Bernlochner and M.~Bessner and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and M.~Campajola and L.~Cao and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and T.~V.~Dong and S.~Dubey and P.~Ecker and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and T.~Gu and K.~Gudkova and C.~Hadjivasiliou and T.~Hara and K.~Hayasaka and S.~Hazra and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and Y.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and S.~Jia and Y.~Jin and K.~K.~Joo and A.~B.~Kaliyar and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and M.~Kumar and R.~Kumar and A.~Kuzmin and Y.-J.~Kwon and Y.-T.~Lai and T.~Lam and M.~Laurenza and S.~C.~Lee and D.~Levit and L.~K.~Li and J.~Libby and K.~Lieret and D.~Liventsev and Y.~Ma and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and G.~B.~Mohanty and I.~Nakamura and T.~Nakano and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and N.~K.~Nisar and S.~Nishida and K.~Ogawa and S.~Ogawa and H.~Ono and P.~Oskin and P.~Pakhlov and G.~Pakhlova and T.~Pang and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.Podobnik and E.~Prencipe and M.~T.~Prim and N.~Rout and G.~Russo and D.~Sahoo and Y.~Sakai and S.~Sandilya and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and K.~Senyo and W.~Shan and M.~Shapkin and C.~Sharma and J.-G.~Shiu and A.~Sokolov and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and W.~Sutcliffe and M.~Takizawa and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and M.~Uchida and Y.~Unno and S.~Uno and Y.~Usov and S.~E.~Vahsen and G.~Varner and A.~Vinokurova and D.~Wang and E.~Wang and M.-Z.~Wang and X.~L.~Wang and M.~Watanabe and S.~Watanuki and O.~Werbycka and E.~Won and B.~D.~Yabsley and W.~Yan and J.~H.~Yin and C.~Z.~Yuan and L.~Yuan and Z.~P.~Zhang and V.~Zhilich}, title = {{M}easurement of the $e^+e^- \to {B}_s^0 \bar{{B}}_s^0 {X}$ cross section in the energy range from $10.63$ to $11.02$ {G}e{V} using inclusive ${D}_s^{\pm}$ and ${D}^0$ production}, year = {2023}, eprint = {2305.10098}, doi = {10.1007/JHEP08(2023)131}, note = {arXiv:2305.10098v2} }
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We report the first measurement of the inclusive $e^+e^- \to b\bar{b} \to D_s^{\pm}X$ and $e^+e^- \to b\bar{b} \to D^0/\bar{D}^0X$ cross sections in the energy range from $10.63$ to $11.02$. Based on these results, we determine $\sigma(e^+ e^- \to B_s^0 \bar{B}_s^0 X)$ and $\sigma(e^+ e^- \to B\bar{B}X)$ in the same energy range. We measure the fraction of $B_s^0$ events at $\Upsilon(10860)$ to be $f_{\rm s}=(22.0^{+2.0}_{-2.1})\%$. We determine also the ratio of the $B_s^0$ inclusive branching fractions $\mathcal{B}(B_s^0 \to D^0/\bar{D}^0X)/\mathcal{B}(B_s^0 \to D_s^{\pm} X)=0.416 \pm 0.018 \pm 0.092$. The results are obtained using the data collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.
Measurement of $C\!P$ violation in $B^{0}\rightarrow K_{S}^{0}\pi^{0}$ decays at Belle II
Belle II Collaboration, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, et al (382)
May 15 2023 hep-ex arXiv:2305.07555v2

@misc{2305.07555, author = {Belle II Collaboration and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and P.~K.~Behera and J.~V.~Bennett and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and D.~Bodrov and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and D.~Ghosh and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and K.~Hara and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and M.~Kaleta and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and S.~Kar and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and C.~Li and L.~K.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and N.~K.~Nisar and S.~Nishida and H.~Ono and Y.~Onuki and P.~Oskin and P.~Pakhlov and G.~Pakhlova and A.~Paladino and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~Sahoo and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and B.~Wach and M.~Wakai and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and V.~I.~Zhukova}, title = {{M}easurement of ${C}\!{P}$ violation in ${B}^{0}\rightarrow {K}_{{S}}^{0}\pi^{0}$ decays at {B}elle {II}}, year = {2023}, eprint = {2305.07555}, howpublished = {PRL 131, 111803 (2023)}, doi = {10.1103/PhysRevLett.131.111803}, note = {arXiv:2305.07555v2} }
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We report a measurement of the $C\!P$-violating parameters $A$ and $S$ in $B^{0}\to K_{S}^{0} \pi^{0}$ decays at Belle II using a sample of $387\times 10^{6}$ $B\bar{B}$ events recorded in $e^{+}e^{-}$ collisions at a center-of-mass energy corresponding to the $\Upsilon(4S)$ resonance. These parameters are determined by fitting the proper decay-time distribution of a sample of 415 signal events. We obtain $A = 0.04^{+0.15}_{-0.14}\pm 0.05$ and $S = 0.75^{+0.20}_{-0.23}\pm 0.04$, where the first uncertainties are statistical and the second are systematic.
Search for lepton-flavor-violating $\tau^- \to \ell^-\phi$ decays in 2019-2021 Belle II data
Belle II Collaboration, F. Abudinén, I. Adachi, K. Adamczyk, L. Aggarwal, P. Ahlburg, H. Ahmed, J. K. Ahn, H. Aihara, N. Akopov, A. Aloisio, L. Andricek, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, V. Aushev, M. Aversano, V. Babu, et al (560)
May 09 2023 hep-ex arXiv:2305.04759v3

@misc{2305.04759, author = {Belle II Collaboration and F.~Abudinén and I.~Adachi and K.~Adamczyk and L.~Aggarwal and P.~Ahlburg and H.~Ahmed and J.~K.~Ahn and H.~Aihara and N.~Akopov and A.~Aloisio and L.~Andricek and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aulchenko and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and S.~Bacher and H.~Bae and S.~Bahinipati and A.~M.~Bakich and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and G.~Batignani and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaulieu and J.~Becker and P.~K.~Behera and J.~V.~Bennett and E.~Bernieri and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and V.~Bhardwaj and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and G.~Bonvicini and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and D.~N.~Brown and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and D.~Červenkov and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and C.~Chen and Y.~Q.~Chen and Y.~Q.~Chen and Y.-T.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and D.~Cinabro and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Cunliffe and T.~Czank and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and B.~Deschamps and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and S.~Duell and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and P.~Fischer and K.~Flood and A.~Fodor and F.~Forti and A.~Frey and M.~Friedl and B.~G.~Fulsom and A.~Gabrielli and N.~Gabyshev and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and U.~Gebauer and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and P.~Goldenzweig and B.~Golob and G.~Gong and P.~Grace and W.~Gradl and M.~Graf-Schreiber and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and Y.~Han and K.~Hara and T.~Hara and O.~Hartbrich and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and H.~Hirata and M.~Hoek and M.~Hohmann and T.~Hotta and C.-L.~Hsu and K.~Huang and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and J.~Irakkathil Jabbar and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and Y.~Iwasaki and S.~Iwata and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and H.~B.~Jeon and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and I.~Kadenko and H.~Kakuno and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and P.~Kapusta and R.~Karl and G.~Karyan and Y.~Kato and T.~Kawasaki and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and H.~J.~Kim and K.-H.~Kim and Y.-K.~Kim and Y.~J.~Kim and T.~D.~Kimmel and H.~Kindo and K.~Kinoshita and C.~Kleinwort and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and J.~F.~Krohn and P.~Krokovny and W.~Kuehn and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kumita and T.~Kunigo and S.~Kurz and A.~Kuzmin and P.~Kvasnička and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and C.~La Licata and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and P.~J.~Laycock and R.~Leboucher and F.~R.~Le Diberder and S.~C.~Lee and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and S.~X.~Li and Y.~B.~Li and J.~Libby and K.~Lieret and J.~Lin and Z.~Liptak and Q.~Y.~Liu and Z.~A.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and J.~McNeil and F.~Meggendorfer and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and K.~Miyabayashi and H.~Miyake and H.~Miyata and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.~Moon and H.-G.~Moser and M.~Mrvar and Th.~Muller and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and E.~Nakano and M.~Nakao and H.~Nakayama and H.~Nakazawa and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and M.~Niiyama and J.~Ninkovic and N.~K.~Nisar and S.~Nishida and K.~Nishimura and M.~H.~A.~Nouxman and K.~Ogawa and S.~Ogawa and S.~L.~Olsen and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and E.~R.~Oxford and H.~Ozaki and P.~Pakhlov and G.~Pakhlova and A.~Paladino and T.~Pang and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and A.~Pathak and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and V.~Popov and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and M.~V.~Purohit and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and A.~Ramirez Morales and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and M.~Ritter and M.~Ritzert and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and P.~Rocchetti and D.~Rodríguez Pérez and M.~Roehrken and J.~M.~Roney and C.~Rosenfeld and A.~Rostomyan and N.~Rout and M.~Rozanska and G.~Russo and D.~Sahoo and Y.~Sakai and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and P.~Sartori and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and J.~Schmitz and M.~Schnepf and H.~Schreeck and J.~Schueler and C.~Schwanda and A.~J.~Schwartz and B.~Schwenker and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and V.~Shebalin and C.~P.~Shen and X.~D.~Shi and H.~Shibuya and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and K.~Smith and R.~J.~Sobie and A.~Soffer and A.~Sokolov and Y.~Soloviev and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and J.~Stypula and Y.~Sue and R.~Sugiura and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and S.~Y.~Suzuki and H.~Svidras and M.~Tabata and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and H.~Tanigawa and N.~Taniguchi and Y.~Tao and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and T.~Tsuboyama and N.~Tsuzuki and M.~Uchida and I.~Ueda and S.~Uehara and Y.~Uematsu and T.~Ueno and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and Y.~V.~Usov and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and V.~Vorobyev and A.~Vossen and B.~Wach and E.~Waheed and M.~Wakai and H.~M.~Wakeling and S.~Wallner and W.~Wan Abdullah and B.~Wang and C.~H.~Wang and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and J.~Webb and S.~Wehle and M.~Welsch and O.~Werbycka and C.~Wessel and J.~Wiechczynski and P.~Wieduwilt and H.~Windel and E.~Won and L.~J.~Wu and Y.~Xie and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and J.~Z.~Zhang and Y.~Zhang and Y.~Zhang and Z.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and V.~Zhulanov and R.~Žlebčík}, title = {{S}earch for lepton-flavor-violating $\tau^- \to \ell^-\phi$ decays in 2019-2021 {B}elle {II} data}, year = {2023}, eprint = {2305.04759}, note = {arXiv:2305.04759v3} }
PDF
We report a search for lepton-flavor-violating decays $\tau^- \to \ell^- \phi$ ($\ell^- =e^-,\mu^-$) at the Belle II experiment, using a sample of electron-positron data produced at the SuperKEKB collider in 2019-2021 and corresponding to an integrated luminosity of 190 fb$^{-1}$. We use a new untagged selection for $e^+e^- \to \tau^+\tau^-$ events, where the signal $\tau$ is searched for as a neutrinoless final state of a single charged lepton and a $\phi$ meson and the other $\tau$ is not reconstructed in any specific decay mode, in contrast to previous measurements by the BaBar and Belle experiments. We find no evidence for $\tau^- \to \ell^- \phi$ decays and obtain upper limits on the branching fractions at 90% confidence level of 23 $\times 10^{-8}$ and 9.7$\times 10^{-8}$ for $\tau^- \rightarrow e^-\phi$ and $\tau^- \rightarrow \mu^-\phi$, respectively
Observation of ${B\to D^{(*)} K^- K^{0}_S}$ decays using the 2019-2022 Belle II data sample
Belle II Collaboration, F. Abudinén, I. Adachi, K. Adamczyk, L. Aggarwal, P. Ahlburg, H. Ahmed, J. K. Ahn, H. Aihara, N. Akopov, A. Aloisio, L. Andricek, N. Anh Ky, D. M. Asner, H. Atmacan, V. Aulchenko, T. Aushev, V. Aushev, M. Aversano, V. Babu, et al (560)
May 03 2023 hep-ex arXiv:2305.01321v1

@misc{2305.01321, author = {Belle II Collaboration and F.~Abudinén and I.~Adachi and K.~Adamczyk and L.~Aggarwal and P.~Ahlburg and H.~Ahmed and J.~K.~Ahn and H.~Aihara and N.~Akopov and A.~Aloisio and L.~Andricek and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and V.~Aulchenko and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and S.~Bacher and H.~Bae and S.~Bahinipati and A.~M.~Bakich and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and G.~Batignani and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaulieu and J.~Becker and P.~K.~Behera and J.~V.~Bennett and E.~Bernieri and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and V.~Bhardwaj and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and G.~Bonvicini and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and D.~N.~Brown and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and D.~Červenkov and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and C.~Chen and Y.~Q.~Chen and Y.~Q.~Chen and Y.-T.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and D.~Cinabro and J.~Cochran and L.~Corona and L.~M.~Cremaldi and S.~Cunliffe and T.~Czank and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and B.~Deschamps and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and S.~Duell and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and P.~Fischer and K.~Flood and A.~Fodor and F.~Forti and A.~Frey and M.~Friedl and B.~G.~Fulsom and A.~Gabrielli and N.~Gabyshev and E.~Ganiev and M.~Garcia-Hernandez and R.~Garg and A.~Garmash and G.~Gaudino and V.~Gaur and A.~Gaz and U.~Gebauer and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and P.~Goldenzweig and B.~Golob and G.~Gong and P.~Grace and W.~Gradl and M.~Graf-Schreiber and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and Y.~Han and K.~Hara and T.~Hara and O.~Hartbrich and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and H.~Hirata and M.~Hoek and M.~Hohmann and T.~Hotta and C.-L.~Hsu and K.~Huang and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and J.~Irakkathil Jabbar and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and Y.~Iwasaki and S.~Iwata and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and H.~B.~Jeon and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and I.~Kadenko and H.~Kakuno and M.~Kaleta and D.~Kalita and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and P.~Kapusta and R.~Karl and G.~Karyan and Y.~Kato and T.~Kawasaki and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and H.~J.~Kim and K.-H.~Kim and Y.-K.~Kim and Y.~J.~Kim and T.~D.~Kimmel and H.~Kindo and K.~Kinoshita and C.~Kleinwort and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and J.~F.~Krohn and P.~Krokovny and W.~Kuehn and T.~Kuhr and J.~Kumar and M.~Kumar and R.~Kumar and K.~Kumara and T.~Kumita and T.~Kunigo and S.~Kurz and A.~Kuzmin and P.~Kvasnička and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and C.~La Licata and K.~Lalwani and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and P.~J.~Laycock and R.~Leboucher and F.~R.~Le Diberder and S.~C.~Lee and P.~Leitl and D.~Levit and P.~M.~Lewis and C.~Li and L.~K.~Li and S.~X.~Li and Y.~B.~Li and J.~Libby and K.~Lieret and J.~Lin and Z.~Liptak and Q.~Y.~Liu and Z.~A.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and T.~Luo and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and J.~McNeil and F.~Meggendorfer and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and K.~Miyabayashi and H.~Miyake and H.~Miyata and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.~Moon and H.-G.~Moser and M.~Mrvar and Th.~Muller and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and E.~Nakano and M.~Nakao and H.~Nakayama and H.~Nakazawa and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and M.~Niiyama and J.~Ninkovic and N.~K.~Nisar and S.~Nishida and K.~Nishimura and M.~H.~A.~Nouxman and K.~Ogawa and S.~Ogawa and S.~L.~Olsen and Y.~Onishchuk and H.~Ono and Y.~Onuki and P.~Oskin and E.~R.~Oxford and H.~Ozaki and P.~Pakhlov and G.~Pakhlova and A.~Paladino and T.~Pang and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and A.~Pathak and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and V.~Popov and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and M.~V.~Purohit and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and A.~Ramirez Morales and N.~Rauls and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and M.~Ritter and M.~Ritzert and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and P.~Rocchetti and D.~Rodríguez Pérez and M.~Roehrken and J.~M.~Roney and C.~Rosenfeld and A.~Rostomyan and N.~Rout and M.~Rozanska and G.~Russo and D.~Sahoo and Y.~Sakai and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and P.~Sartori and Y.~Sato and V.~Savinov and B.~Scavino and C.~Schmitt and J.~Schmitz and M.~Schnepf and H.~Schreeck and J.~Schueler and C.~Schwanda and A.~J.~Schwartz and B.~Schwenker and M.~Schwickardi and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and V.~Shebalin and C.~P.~Shen and X.~D.~Shi and H.~Shibuya and T.~Shillington and J.-G.~Shiu and D.~Shtol and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and K.~Smith and R.~J.~Sobie and A.~Soffer and A.~Sokolov and Y.~Soloviev and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and P.~Stavroulakis and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and J.~Stypula and Y.~Sue and R.~Sugiura and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and S.~Y.~Suzuki and H.~Svidras and M.~Tabata and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and H.~Tanigawa and N.~Taniguchi and Y.~Tao and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and T.~Tsuboyama and N.~Tsuzuki and M.~Uchida and I.~Ueda and S.~Uehara and Y.~Uematsu and T.~Ueno and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and Y.~V.~Usov and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and V.~Vorobyev and A.~Vossen and B.~Wach and E.~Waheed and M.~Wakai and H.~M.~Wakeling and S.~Wallner and W.~Wan Abdullah and B.~Wang and C.~H.~Wang and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and J.~Webb and S.~Wehle and M.~Welsch and O.~Werbycka and C.~Wessel and J.~Wiechczynski and P.~Wieduwilt and H.~Windel and E.~Won and L.~J.~Wu and Y.~Xie and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and J.~Z.~Zhang and Y.~Zhang and Y.~Zhang and Z.~Zhang and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and V.~Zhulanov and R.~Žlebčík}, title = {{O}bservation of ${{B}\to {D}^{(*)} {K}^- {K}^{0}_{S}}$ decays using the 2019-2022 {B}elle {II} data sample}, year = {2023}, eprint = {2305.01321}, note = {arXiv:2305.01321v1} }
PDF
We present a measurement of the branching fractions of four $B^{0,-}\to D^{(*)+,0} K^- K^{0}_S$ decay modes. The measurement is based on data from SuperKEKB electron-positron collisions at the $\Upsilon(4S)$ resonance collected with the Belle II detector and corresponding to an integrated luminosity of ${362~\text{fb}^{-1}}$. The event yields are extracted from fits to the distributions of the difference between expected and observed $B$ meson energy to separate signal and background, and are efficiency-corrected as a function of the invariant mass of the $K^-K_S^0$ system. We find the branching fractions to be: \[ \textB(B^-\to D^0K^-K_S^0)=(1.89\pm 0.16\pm 0.10)\times 10^-4, \] \[ \textB(\overline B^0\to D^+K^-K_S^0)=(0.85\pm 0.11\pm 0.05)\times 10^-4,\] \[ \textB(B^-\to D^*0K^-K_S^0)=(1.57\pm 0.27\pm 0.12)\times 10^-4, \] \[ \textB(\overline B^0\to D^*+K^-K_S^0)=(0.96\pm 0.18\pm 0.06)\times 10^-4,\]where the first uncertainty is statistical and the second systematic. These results include the first observation of $\overline B{}^0\to D^+K^-K_S^0$, $B^-\to D^{*0}K^-K_S^0$, and $\overline B{}^0\to D^{*+}K^-K_S^0$ decays and a significant improvement in the precision of $\text{B}(B^-\to D^0K^-K_S^0)$ compared to previous measurements.
Novel method for the identification of the production flavor of neutral charmed mesons
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, M. Aversano, V. Babu, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, M. Barrett, J. Baudot, et al (379)
Apr 06 2023 hep-ex arXiv:2304.02042v2

@misc{2304.02042, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and M.~Aversano and V.~Babu and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and P.~K.~Behera and J.~V.~Bennett and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and B.~Bhuyan and F.~Bianchi and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and A.~Bolz and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and L.~Corona and L.~M.~Cremaldi and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and G.~Giakoustidis and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and S.~Halder and Y.~Han and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hoek and M.~Hohmann and C.-L.~Hsu and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and A.~Johnson and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and G.~Karyan and T.~Kawasaki and F.~Keil and C.~Ketter and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and M.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and Y.-T.~Lai and T.~Lam and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and C.~Li and L.~K.~Li and J.~Libby and Q.~Y.~Liu and Z.~Q.~Liu and S.~Longo and A.~Lozar and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and R.~Maiti and S.~Maity and G.~Mancinelli and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and R.~Mehta and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and M.~Mirra and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Mondal and S.~Moneta and H.-G.~Moser and R.~Mussa and I.~Nakamura and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and M.~Niiyama and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and E.~R.~Oxford and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and S.-H.~Park and B.~Paschen and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Peschke and R.~Pestotnik and M.~Piccolo and L.~E.~Piilonen and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and M.~Roehrken and J.~M.~Roney and A.~Rostomyan and N.~Rout and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and M.~Schnepf and C.~Schwanda and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and D.~Shtol and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and M.~Sobotzik and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and M.~Sumihama and W.~Sutcliffe and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and A.~Thaller and O.~Tittel and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and B.~Wach and M.~Wakai and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and V.~Zhilich and J.~S.~Zhou and Q.~D.~Zhou and V.~I.~Zhukova}, title = {{N}ovel method for the identification of the production flavor of neutral charmed mesons}, year = {2023}, eprint = {2304.02042}, note = {arXiv:2304.02042v2} }
PDF
We propose a new algorithm for the identification of the production flavor of neutral $D$ mesons in the Belle II experiment. The algorithm exploits the correlation between the flavor of a reconstructed neutral $D$ meson (signal $D$ meson) and the electric charges of particles reconstructed in the rest of the $e^+e^-\to c \bar{c}$ event. These include those originating from the decay of the other charm hadron produced in the event, as well as those possibly produced in association with the signal $D$ meson. We develop the algorithm using simulation and calibrate it in data using decay modes that identify the flavor of the decaying neutral $D$ meson. We use a data sample of $e^+e^-$ collisions, corresponding to $362\,\mathrm{fb}^{-1}$ of integrated luminosity, collected by Belle II at center-of-mass energies near the $\Upsilon(4S)$ mass. The effective tagging efficiency in data is $(47.91 \pm 0.07 \mathrm{(stat)} \pm 0.51 \mathrm{(syst)})\%$, independent of the neutral-$D$-meson decay mode. This charm flavor tagger will approximately double the effective sample size of many $CP$-violation and charm-mixing measurements that so far have exclusively relied on neutral $D$ mesons originating from $D^{*\pm}$ decays. While developed for Belle II, the basic principles underlying the charm flavor tagger can be used in other experiments, including those at hadron colliders.
First Simultaneous Determination of Inclusive and Exclusive $\left|V_{ub}\right|$
Belle Collaboration, L. Cao, F. Bernlochner, K. Tackmann, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, S. Bahinipati, Sw. Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, et al (194)
Mar 31 2023 hep-ex hep-ph arXiv:2303.17309v2

@misc{2303.17309, author = {Belle Collaboration and L.~Cao and F.~Bernlochner and K.~Tackmann and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and T.~Aushev and R.~Ayad and V.~Babu and S.~Bahinipati and Sw.~Banerjee and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and B.~Bhuyan and T.~Bilka and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and S.~Cunliffe and S.~Das and G.~de Marino and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and T.~Ferber and D.~Ferlewicz and A.~Frey and B.~G.~Fulsom and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and T.~Hara and O.~Hartbrich and K.~Hayasaka and H.~Hayashii and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and S.~Jia and Y.~Jin and K.~K.~Joo and D.~Kalita and K.~H.~Kang and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and K.~Kinoshita and P.~Kodyš and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and P.~Križan and P.~Krokovny and T.~Kuhr and R.~Kumar and K.~Kumara and A.~Kuzmin and Y.-J.~Kwon and J.~S.~Lange and M.~Laurenza and S.~C.~Lee and P.~Lewis and J.~Li and L.~K.~Li and Y.~Li and J.~Libby and Y.-R.~Lin and D.~Liventsev and T.~Luo and Y.~Ma and A.~Martini and M.~Masuda and T.~Matsuda and D.~Matvienko and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and M.~Mrvar and R.~Mussa and I.~Nakamura and M.~Nakao and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and N.~K.~Nisar and S.~Nishida and K.~Ogawa and S.~Ogawa and H.~Ono and P.~Oskin and P.~Pakhlov and G.~Pakhlova and T.~Pang and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and N.~Rout and M.~Rozanska and G.~Russo and S.~Sandilya and A.~Sangal and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and M.~E.~Sevior and W.~Shan and M.~Shapkin and C.~Sharma and C.~P.~Shen and J.-G.~Shiu and B.~Shwartz and A.~Sokolov and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and W.~Sutcliffe and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and M.~Uchida and T.~Uglov and Y.~Unno and K.~Uno and S.~Uno and Y.~Ushiroda and Y.~Usov and S.~E.~Vahsen and G.~Varner and K.~E.~Varvell and A.~Vossen and D.~Wang and E.~Wang and M.-Z.~Wang and S.~Watanuki and O.~Werbycka and E.~Won and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~H.~Yin and Y.~Yook and Y.~Yusa and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{F}irst {S}imultaneous {D}etermination of {I}nclusive and {E}xclusive $\left|{V}_{ub}\right|$}, year = {2023}, eprint = {2303.17309}, note = {arXiv:2303.17309v2} }
PDF
The first simultaneous determination of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element $V_{ub}$ using inclusive and exclusive decays is performed with the full Belle data set at the $\Upsilon(4S)$ resonance, corresponding to an integrated luminosity of 711 fb${}^{-1}$. We analyze collision events in which one $B$ meson is fully reconstructed in hadronic modes. This allows for the reconstruction of the hadronic $X_u$ system of the semileptonic $b \to u \ell \bar \nu_\ell$ decay. We separate exclusive $B \to \pi \, \ell\, \bar \nu_{\ell}$ decays from other inclusive $B \to X_u \, \ell\, \bar \nu_{\ell}$ and backgrounds with a two-dimensional fit, that utilizes the number of charged pions in the $X_u$ system and the four-momentum transfer $q^2$ between the $B$ and $X_u$ system. Combining our measurement with information from lattice QCD and QCD calculations of the inclusive partial rate as well as external experimental information on the shape of the $B \to \pi \, \ell\, \bar \nu_{\ell}$ form factor, we determine $\left|V_{ub}^{\mathrm{excl.}} \right| = (3.78 \pm 0.23 \pm 0.16 \pm 0.14)\times 10^{-3}$ and $\left|V_{ub}^{\mathrm{incl.}} \right| = (3.88 \pm 0.20 \pm 0.31 \pm 0.09)\times 10^{-3}$, respectively, with the uncertainties being the statistical error, systematic errors, and theory errors. The ratio of $\left|V_{ub}^{\mathrm{excl.}} \right| / \left|V_{ub}^{\mathrm{incl.}} \right| = 0.97 \pm 0.12$ is compatible with unity.
STCF Conceptual Design Report: Volume 1 -- Physics & Detector
M. Achasov, X. C. Ai, R. Aliberti, L. P. An, Q. An, X. Z. Bai, Y. Bai, O. Bakina, A. Barnyakov, V. Blinov, V. Bobrovnikov, D. Bodrov, A. Bogomyagkov, A. Bondar, I. Boyko, Z. H. Bu, F. M. Cai, H. Cai, J. J. Cao, Q. H. Cao, et al (418)
Mar 29 2023 hep-ex hep-ph physics.ins-det arXiv:2303.15790v3

@misc{2303.15790, author = {M.~Achasov and X.~C.~Ai and R.~Aliberti and L.~P.~An and Q.~An and X.~Z.~Bai and Y.~Bai and O.~Bakina and A.~Barnyakov and V.~Blinov and V.~Bobrovnikov and D.~Bodrov and A.~Bogomyagkov and A.~Bondar and I.~Boyko and Z.~H.~Bu and F.~M.~Cai and H.~Cai and J.~J.~Cao and Q.~H.~Cao and Z.~Cao and Q.~Chang and K.~T.~Chao and D.~Y.~Chen and H.~Chen and H.~X.~Chen and J.~F.~Chen and K.~Chen and L.~L.~Chen and P.~Chen and S.~L.~Chen and S.~M.~Chen and S.~Chen and S.~P.~Chen and W.~Chen and X.~F.~Chen and X.~Chen and Y.~Chen and Y.~Q.~Chen and H.~Y.~Cheng and J.~Cheng and S.~Cheng and J.~P.~Dai and L.~Y.~Dai and X.~C.~Dai and D.~Dedovich and A.~Denig and I.~Denisenko and D.~Z.~Ding and L.~Y.~Dong and W.~H.~Dong and V.~Druzhinin and D.~S.~Du and Y.~J.~Du and Z.~G.~Du and L.~M.~Duan and D.~Epifanov and Y.~L.~Fan and S.~S.~Fang and Z.~J.~Fang and G.~Fedotovich and C.~Q.~Feng and X.~Feng and Y.~T.~Feng and J.~L.~Fu and J.~Gao and P.~S.~Ge and C.~Q.~Geng and L.~S.~Geng and A.~Gilman and L.~Gong and T.~Gong and W.~Gradl and J.~L.~Gu and A.~G.~Escalante and L.~C.~Gui and F.~K.~Guo and J.~C.~Guo and J.~Guo and Y.~P.~Guo and Z.~H.~Guo and A.~Guskov and K.~L.~Han and L.~Han and M.~Han and X.~Q.~Hao and J.~B.~He and S.~Q.~He and X.~G.~He and Y.~L.~He and Z.~B.~He and Z.~X.~Heng and B.~L.~Hou and T.~J.~Hou and Y.~R.~Hou and C.~Y.~Hu and H.~M.~Hu and K.~Hu and R.~J.~Hu and X.~H.~Hu and Y.~C.~Hu and J.~Hua and G.~S.~Huang and J.~S.~Huang and M.~Huang and Q.~Y.~Huang and W.~Q.~Huang and X.~T.~Huang and X.~J.~Huang and Y.~B.~Huang and Y.~S.~Huang and N.~Hüsken and V.~Ivanov and Q.~P.~Ji and J.~J.~Jia and S.~Jia and Z.~K.~Jia and H.~B.~Jiang and J.~Jiang and S.~Z.~Jiang and J.~B.~Jiao and Z.~Jiao and H.~J.~Jing and X.~L.~Kang and X.~S.~Kang and B.~C.~Ke and M.~Kenzie and A.~Khoukaz and I.~Koop and E.~Kravchenko and A.~Kuzmin and Y.~Lei and E.~Levichev and C.~H.~Li and C.~Li and D.~Y.~Li and F.~Li and G.~Li and G.~Li and H.~B.~Li and H.~Li and H.~N.~Li and H.~J.~Li and H.~L.~Li and J.~M.~Li and J.~Li and L.~Li and L.~Li and L.~Y.~Li and N.~Li and P.~R.~Li and R.~H.~Li and S.~Li and T.~Li and W.~J.~Li and X.~H.~Li and X.~Q.~Li and X.~H.~Li and Y.~Li and Y.~Y.~Li and Z.~J.~Li and H.~Liang and J.~H.~Liang and G.~R.~Liao and L.~Z.~Liao and Y.~Liao and C.~X.~Lin and X.~S.~Lin and B.~J.~Liu and C.~W.~Liu and D.~Liu and F.~Liu and G.~M.~Liu and H.~B.~Liu and J.~Liu and J.~J.~Liu and J.~B.~Liu and K.~Liu and K.~Y.~Liu and K.~Liu and L.~Liu and Q.~Liu and S.~B.~Liu and T.~Liu and X.~Liu and Y.~W.~Liu and Y.~Liu and Y.~L.~Liu and Z.~Q.~Liu and Z.~Y.~Liu and Z.~W.~Liu and I.~Logashenko and Y.~Long and C.~G.~Lu and N.~Lu and Q.~F.~Lü and Y.~Lu and Y.~Lu and Z.~Lv and P.~Lukin and F.~J.~Luo and T.~Luo and X.~F.~Luo and H.~J.~Lyu and X.~R.~Lyu and J.~P.~Ma and P.~Ma and Y.~Ma and F.~Maas and S.~Malde and D.~Matvienko and Z.~X.~Meng and R.~Mitchell and J.~M.~Dias and A.~Nefediev and Y.~Nefedov and S.~L.~Olsen and Q.~Ouyang and P.~Pakhlov and G.~Pakhlova and X.~Pan and Y.~Pan and E.~Passemar and Y.~P.~Pei and H.~P.~Peng and L.~Peng and X.~Y.~Peng and X.~J.~Peng and K.~Peters and S.~Pivovarov and E.~Pyata and B.~B.~Qi and Y.~Q.~Qi and W.~B.~Qian and Y.~Qian and C.~F.~Qiao and J.~J.~Qin and J.~J.~Qin and L.~Q.~Qin and X.~S.~Qin and T.~L.~Qiu and J.~Rademacker and C.~F.~Redmer and H.~Y.~Sang and M.~Saur and W.~Shan and X.~Y.~Shan and L.~L.~Shang and M.~Shao and L.~Shekhtman and C.~P.~Shen and J.~M.~Shen and Z.~T.~Shen and H.~C.~Shi and X.~D.~Shi and B.~Shwartz and A.~Sokolov and J.~J.~Song and W.~M.~Song and Y.~Song and Y.~X.~Song and A.~Sukharev and J.~F.~Sun and L.~Sun and X.~M.~Sun and Y.~J.~Sun and Z.~P.~Sun and J.~Tang and S.~S.~Tang and Z.~B.~Tang and C.~H.~Tian and J.~S.~Tian and Y.~Tikhonov and K.~Todyshev and T.~Uglov and V.~Vorobyev and B.~D.~Wan and B.~L.~Wang and B.~Wang and D.~Y.~Wang and G.~Y.~Wang and G.~L.~Wang and H.~L.~Wang and J.~Wang and J.~H.~Wang and J.~C.~Wang and M.~L.~Wang and R.~Wang and S.~B.~Wang and W.~Wang and W.~P.~Wang and X.~C.~Wang and X.~D.~Wang and X.~L.~Wang and X.~L.~Wang and X.~P.~Wang and X.~F.~Wang and Y.~D.~Wang and Y.~P.~Wang and Y.~Q.~Wang and Y.~L.~Wang and Y.~G.~Wang and Z.~Y.~Wang and Z.~Y.~Wang and Z.~L.~Wang and Z.~G.~Wang and D.~H.~Wei and X.~L.~Wei and X.~M.~Wei and Q.~G.~Wen and X.~J.~Wen and G.~Wilkinson and B.~Wu and J.~J.~Wu and L.~Wu and P.~W.~Wu and T.~W.~Wu and Y.~S.~Wu and L.~Xia and T.~Xiang and C.~W.~Xiao and D.~Xiao and M.~Xiao and Y.~H.~Xie and Y.~Xing and Z.~Z.~Xing and X.~N.~Xiong and F.~R.~Xu and J.~Xu and L.~L.~Xu and Q.~N.~Xu and X.~C.~Xu and X.~P.~Xu and Y.~C.~Xu and Y.~P.~Xu and Y.~Xu and Z.~Z.~Xu and D.~W.~Xuan and F.~F.~Xue and L.~Yan and M.~J.~Yan and W.~B.~Yan and W.~C.~Yan and X.~S.~Yan and B.~F.~Yang and C.~Yang and H.~J.~Yang and H.~R.~Yang and H.~T.~Yang and J.~F.~Yang and S.~L.~Yang and Y.~D.~Yang and Y.~H.~Yang and Y.~S.~Yang and Y.~L.~Yang and Z.~Y.~Yang and D.~L.~Yao and H.~Yin and X.~H.~Yin and N.~Yokozaki and S.~Y.~You and Z.~Y.~You and C.~X.~Yu and F.~S.~Yu and G.~L.~Yu and H.~L.~Yu and J.~S.~Yu and J.~Q.~Yu and L.~Yuan and X.~B.~Yuan and Y.~F.~Yue and M.~Zeng and S.~Zeng and A.~L.~Zhang and B.~W.~Zhang and G.~Y.~Zhang and G.~Q.~Zhang and H.~J.~Zhang and H.~B.~Zhang and J.~Y.~Zhang and J.~L.~Zhang and J.~Zhang and L.~Zhang and L.~M.~Zhang and R.~Zhang and S.~L.~Zhang and T.~Zhang and X.~Zhang and Y.~Zhang and Y.~X.~Zhang and Y.~T.~Zhang and Y.~F.~Zhang and Y.~C.~Zhang and Y.~Zhang and Y.~Zhang and Y.~M.~Zhang and Y.~L.~Zhang and Z.~H.~Zhang and Z.~Y.~Zhang and Z.~Y.~Zhang and H.~Y.~Zhao and J.~Zhao and L.~Zhao and M.~G.~Zhao and Q.~Zhao and R.~G.~Zhao and R.~P.~Zhao and Z.~G.~Zhao and Z.~X.~Zhao and A.~Zhemchugov and B.~Zheng and L.~Zheng and Q.~B.~Zheng and R.~Zheng and Y.~H.~Zheng and X.~H.~Zhong and H.~J.~Zhou and H.~Q.~Zhou and H.~Zhou and S.~H.~Zhou and X.~Zhou and X.~K.~Zhou and X.~R.~Zhou and Y.~L.~Zhou and Y.~Zhou and Y.~X.~Zhou and Z.~Y.~Zhou and J.~Y.~Zhu and K.~Zhu and R.~D.~Zhu and R.~L.~Zhu and S.~H.~Zhu and Y.~C.~Zhu and Z.~A.~Zhu and V.~Zhukova and V.~Zhulanov and B.~S.~Zou and Y.~B.~Zuo}, title = {{STCF} {C}onceptual {D}esign {R}eport: {V}olume 1 -- {P}hysics & {D}etector}, year = {2023}, eprint = {2303.15790}, note = {arXiv:2303.15790v3} }
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The Super $\tau$-Charm facility (STCF) is an electron-positron collider proposed by the Chinese particle physics community. It is designed to operate in a center-of-mass energy range from 2 to 7 GeV with a peak luminosity of $0.5\times 10^{35}{\rm cm}^{-2}{\rm s}^{-1}$ or higher. The STCF will produce a data sample about a factor of 100 larger than that by the present $\tau$-Charm factory -- the BEPCII, providing a unique platform for exploring the asymmetry of matter-antimatter (charge-parity violation), in-depth studies of the internal structure of hadrons and the nature of non-perturbative strong interactions, as well as searching for exotic hadrons and physics beyond the Standard Model. The STCF project in China is under development with an extensive R\&D program. This document presents the physics opportunities at the STCF, describes conceptual designs of the STCF detector system, and discusses future plans for detector R\&D and physics case studies.
First measurement of the Michel parameter $\xi^\prime$ in the $\tau^-\to\mu^-\bar{\nu}_\mu\nu_\tau$ decay at Belle
Belle Collaboration, D. Bodrov, P. Pakhlov, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, et al (174)
Mar 21 2023 hep-ex arXiv:2303.10570v3

@misc{2303.10570, author = {Belle Collaboration and D.~Bodrov and P.~Pakhlov and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and B.~Bhuyan and T.~Bilka and D.~Biswas and A.~Bobrov and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and H.~E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and D.~Greenwald and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and K.~Hayasaka and H.~Hayashii and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and D.~Kalita and A.~B.~Kaliyar and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and S.~Korpar and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and R.~Kumar and K.~Kumara and Y.-J.~Kwon and J.~S.~Lange and S.~C.~Lee and J.~Li and L.~K.~Li and J.~Libby and K.~Lieret and Y.-R.~Lin and D.~Liventsev and T.~Luo and Y.~Ma and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and M.~Nakao and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and N.~K.~Nisar and S.~Nishida and S.~Ogawa and P.~Oskin and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and A.~Passeri and S.~Patra and S.~Paul and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and A.~Rabusov and N.~Rout and G.~Russo and S.~Sandilya and A.~Sangal and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and W.~Shan and M.~Shapkin and C.~Sharma and J.-G.~Shiu and J.~B.~Singh and A.~Sokolov and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and M.~Uchida and T.~Uglov and Y.~Unno and K.~Uno and S.~Uno and S.~E.~Vahsen and G.~Varner and A.~Vinokurova and A.~Vossen and D.~Wang and E.~Wang and M.-Z.~Wang and S.~Watanuki and O.~Werbycka and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and C.~Z.~Yuan and Y.~Yusa and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{F}irst measurement of the {M}ichel parameter $\xi^\prime$ in the $\tau^-\to\mu^-\bar{\nu}_\mu\nu_\tau$ decay at {B}elle}, year = {2023}, eprint = {2303.10570}, howpublished = {Phys. Rev. Lett. 131 (2023) 021801}, doi = {10.1103/PhysRevLett.131.021801}, note = {arXiv:2303.10570v3} }
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We report the first measurement of the Michel parameter $\xi^\prime$ in the $\tau^-\to\mu^-\bar{\nu}_\mu\nu_\tau$ decay with a new method proposed just recently. The measurement is based on the reconstruction of the $\tau^-\to\mu^-\bar{\nu}_\mu\nu_\tau$ events with subsequent muon decay-in-flight in the Belle central drift chamber. The analyzed data sample of $988\,\text{fb}^{-1}$ collected by the Belle detector corresponds to approximately $912\times10^6$ $\tau^+ \tau^-$ pairs. We measure $\xi^\prime=0.22\pm0.94(\text{stat})\pm0.42(\text{syst})$, which is in agreement with the standard model prediction of $\xi^\prime=1$. Statistical uncertainty dominates in this study, being a limiting factor, while systematic uncertainty is well under control. Our analysis proved the practicability of this promising method and its prospects for further precise measurement in future experiments.
Study of the muon decay-in-flight in the $\tau^-\to\mu^-\bar{\nu}_\mu\nu_\tau$ decay to measure the Michel parameter $\xi^\prime$
Belle Collaboration, D. Bodrov, P. Pakhlov, I. Adachi, H. Aihara, S. Al Said, D. M. Asner, H. Atmacan, T. Aushev, R. Ayad, V. Babu, Sw. Banerjee, P. Behera, K. Belous, J. Bennett, M. Bessner, B. Bhuyan, T. Bilka, D. Biswas, A. Bobrov, et al (175)
Mar 21 2023 hep-ex arXiv:2303.10574v3

@misc{2303.10574, author = {Belle Collaboration and D.~Bodrov and P.~Pakhlov and I.~Adachi and H.~Aihara and S.~Al Said and D.~M.~Asner and H.~Atmacan and T.~Aushev and R.~Ayad and V.~Babu and Sw.~Banerjee and P.~Behera and K.~Belous and J.~Bennett and M.~Bessner and B.~Bhuyan and T.~Bilka and D.~Biswas and A.~Bobrov and A.~Bondar and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and T.~E.~Browder and A.~Budano and M.~Campajola and D.~Červenkov and M.-C.~Chang and B.~G.~Cheon and K.~Chilikin and K.~Cho and S.-J.~Cho and S.-K.~Choi and Y.~Choi and S.~Choudhury and D.~Cinabro and S.~Das and G.~De Nardo and G.~De Pietro and R.~Dhamija and F.~Di Capua and J.~Dingfelder and Z.~Doležal and T.~V.~Dong and D.~Epifanov and T.~Ferber and D.~Ferlewicz and B.~G.~Fulsom and V.~Gaur and A.~Garmash and A.~Giri and P.~Goldenzweig and E.~Graziani and D.~Greenwald and T.~Gu and Y.~Guan and K.~Gudkova and C.~Hadjivasiliou and S.~Halder and K.~Hayasaka and H.~Hayashii and M.~T.~Hedges and D.~Herrmann and W.-S.~Hou and C.-L.~Hsu and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and D.~Kalita and A.~B.~Kaliyar and K.~H.~Kang and T.~Kawasaki and C.~Kiesling and C.~H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and A.~Korobov and S.~Korpar and P.~Križan and P.~Krokovny and T.~Kuhr and M.~Kumar and R.~Kumar and K.~Kumara and Y.-J.~Kwon and J.~S.~Lange and S.~C.~Lee and J.~Li and L.~K.~Li and Y.~Li and J.~Libby and K.~Lieret and Y.-R.~Lin and D.~Liventsev and Y.~Ma and M.~Masuda and T.~Matsuda and S.~K.~Maurya and F.~Meier and M.~Merola and F.~Metzner and K.~Miyabayashi and R.~Mizuk and G.~B.~Mohanty and R.~Mussa and I.~Nakamura and M.~Nakao and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and P.~Oskin and G.~Pakhlova and S.~Pardi and H.~Park and J.~Park and S.-H.~Park and S.~Patra and S.~Paul and T.~K.~Pedlar and R.~Pestotnik and L.~E.~Piilonen and T.~Podobnik and E.~Prencipe and M.~T.~Prim and A.~Rabusov and G.~Russo and S.~Sandilya and A.~Sangal and L.~Santelj and V.~Savinov and G.~Schnell and C.~Schwanda and Y.~Seino and K.~Senyo and W.~Shan and M.~Shapkin and C.~Sharma and J.-G.~Shiu and J.~B.~Singh and A.~Sokolov and E.~Solovieva and M.~Starič and Z.~S.~Stottler and M.~Sumihama and M.~Takizawa and U.~Tamponi and K.~Tanida and F.~Tenchini and R.~Tiwary and K.~Trabelsi and M.~Uchida and T.~Uglov and Y.~Unno and K.~Uno and S.~Uno and S.~E.~Vahsen and G.~Varner and A.~Vinokurova and A.~Vossen and D.~Wang and E.~Wang and M.-Z.~Wang and S.~Watanuki and X.~Xu and B.~D.~Yabsley and W.~Yan and S.~B.~Yang and J.~Yelton and J.~H.~Yin and C.~Z.~Yuan and Y.~Yusa and Z.~P.~Zhang and V.~Zhilich and V.~Zhukova}, title = {{S}tudy of the muon decay-in-flight in the $\tau^-\to\mu^-\bar{\nu}_\mu\nu_\tau$ decay to measure the {M}ichel parameter $\xi^\prime$}, year = {2023}, eprint = {2303.10574}, howpublished = {Phys. Rev. D 108 (2023) 012003}, doi = {10.1103/PhysRevD.108.012003}, note = {arXiv:2303.10574v3} }
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We present the first measurement of the Michel parameter $\xi^\prime$ in the $\tau^-\to\mu^-\bar{\nu}_\mu\nu_\tau$ decay using the full data sample of $988\,\text{fb}^{-1}$ collected by the Belle detector operating at the KEKB asymmetric energy $e^+ e^-$ collider. The method is based on the reconstruction of the $\mu^- \to e^- \bar{\nu}_e\nu_\mu$ decay-in-flight in the Belle central drift chamber and relies on the correlation between muon spin and its daughter electron momentum. We study the main sources of the background that can imitate the signal decay, such as kaon and pion decays-in-flight and charged particle scattering on the detector material. Highly efficient methods of their suppression are developed and applied to select 165 signal-candidate events. We obtain $\xi^\prime=0.22\pm0.94\pm0.42$ where the first uncertainty is statistical, and the second one is systematic. The result is in agreement with the Standard Model prediction of $\xi^\prime=1$.
Measurement of the branching fraction and $\it CP$ asymmetry of $B^{0} \rightarrow \pi^{0} \pi^{0}$ decays using $198 \times 10^6$ $B\overline{B}$ pairs in Belle II data
Belle II Collaboration, F. Abudinén, I. Adachi, K. Adamczyk, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, et al (408)
Mar 16 2023 hep-ex arXiv:2303.08354v3

@misc{2303.08354, author = {Belle II Collaboration and F.~Abudinén and I.~Adachi and K.~Adamczyk and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and P.~K.~Behera and J.~V.~Bennett and E.~Bernieri and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and V.~Bhardwaj and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and D.~Bodrov and A.~Bolz and J.~Borah and A.~Bozek and M.~Bračko and P.~Branchini and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and M.-C.~Chang and P.~Chang and R.~Cheaib and P.~Cheema and V.~Chekelian and C.~Chen and Y.~Q.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and D.~Cinabro and J.~Cochran and L.~Corona and S.~Cunliffe and S.~Das and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and S.~Dey and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and C.~Finck and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and G.~Gaudino and V.~Gaur and A.~Gellrich and G.~Ghevondyan and R.~Giordano and A.~Giri and B.~Gobbo and R.~Godang and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and Y.~Guan and K.~Gudkova and J.~Guilliams and S.~Halder and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hohmann and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and G.~Inguglia and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and P.~Jackson and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and K.~K.~Joo and H.~Junkerkalefeld and H.~Kakuno and M.~Kaleta and A.~B.~Kaliyar and J.~Kandra and K.~H.~Kang and S.~Kang and R.~Karl and G.~Karyan and T.~Kawasaki and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and K.~Kinoshita and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and T.~Konno and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and T.~M.~G.~Kraetzschmar and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and T.~Lam and L.~Lanceri and J.~S.~Lange and M.~Laurenza and K.~Lautenbach and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and C.~Li and L.~K.~Li and Y.~B.~Li and J.~Libby and K.~Lieret and Z.~Liptak and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and A.~Lozar and T.~Lueck and C.~Lyu and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and T.~Matsuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and H.~Nakayama and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and Z.~Natkaniec and A.~Natochii and L.~Nayak and M.~Nayak and G.~Nazaryan and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and E.~Paoloni and S.~Pardi and K.~Parham and H.~Park and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and M.~Piccolo and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and A.~Ramirez Morales and M.~Reif and S.~Reiter and M.~Remnev and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and S.~H.~Robertson and D.~Rodríguez Pérez and J.~M.~Roney and A.~Rostomyan and N.~Rout and G.~Russo and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and V.~Savinov and B.~Scavino and J.~Schueler and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and C.~Sharma and C.~P.~Shen and X.~D.~Shi and T.~Shillington and J.-G.~Shiu and B.~Shwartz and A.~Sibidanov and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and A.~Soffer and A.~Sokolov and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and S.~Stefkova and Z.~S.~Stottler and R.~Stroili and J.~Strube and Y.~Sue and M.~Sumihama and K.~Sumisawa and W.~Sutcliffe and S.~Y.~Suzuki and H.~Svidras and M.~Takizawa and U.~Tamponi and K.~Tanida and H.~Tanigawa and F.~Tenchini and A.~Thaller and R.~Tiwary and D.~Tonelli and E.~Torassa and N.~Toutounji and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and A.~Vossen and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and J.~Wiechczynski and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and H.~Ye and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and C.~Z.~Yuan and Y.~Yusa and L.~Zani and Y.~Zhai and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of the branching fraction and $\it {CP}$ asymmetry of ${B}^{0} \rightarrow \pi^{0} \pi^{0}$ decays using $198 \times 10^6$ ${B}\overline{{B}}$ pairs in {B}elle {II} data}, year = {2023}, eprint = {2303.08354}, note = {arXiv:2303.08354v3} }
PDF
We report measurements of the branching fraction and $\it CP$ asymmetry in $B^{0} \to \pi^{0} \pi^{0}$ decays reconstructed at Belle II in an electron-positron collision sample containing $198 \times 10^{6}$ $B\overline{B}$ pairs. We measure a branching fraction $\mathcal{B}(\Bpipi) = (1.38 \pm 0.27 \pm 0.22) \times 10^{-6}$ and a $\it CP$ asymmetry $\Acp(\Bpipi) = 0.14 \pm 0.46 \pm 0.07$, where the first uncertainty is statistical and the second is systematic.
Measurement of decay-time-dependent $\textit{CP}$ violation in $B^0 \to J/\psi K^0_S$ decays using 2019-2021 Belle II data
Belle II Collaboration, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, J. Baudot, M. Bauer, et al (375)
Feb 28 2023 hep-ex arXiv:2302.12898v1

@misc{2302.12898, author = {Belle II Collaboration and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and J.~V.~Bennett and E.~Bernieri and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and V.~Bhardwaj and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and A.~Bozek and M.~Bračko and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and P.~Chang and P.~Cheema and V.~Chekelian and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and S.~Cunliffe and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and S.~Halder and K.~Hara and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hohmann and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and M.~Kaleta and A.~B.~Kaliyar and K.~H.~Kang and G.~Karyan and T.~Kawasaki and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and L.~K.~Li and J.~Libby and Z.~Liptak and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and A.~Natochii and L.~Nayak and G.~Nazaryan and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and S.~Pardi and K.~Parham and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and J.~M.~Roney and A.~Rostomyan and N.~Rout and Y.~Sakai and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and T.~Shillington and J.-G.~Shiu and D.~Shtol and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and A.~Soffer and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and W.~Sutcliffe and S.~Y.~Suzuki and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and H.~Tanigawa and N.~Taniguchi and F.~Tenchini and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and A.~Vossen and M.~Wakai and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and H.~Ye and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and Y.~Yusa and L.~Zani and Y.~Zhai and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of decay-time-dependent $\textit{{CP}}$ violation in ${B}^0 \to {J}/\psi {K}^0_{S}$ decays using 2019-2021 {B}elle {II} data}, year = {2023}, eprint = {2302.12898}, note = {arXiv:2302.12898v1} }
PDF
We report a measurement of the mixing-induced and direct $\textit{CP}$ violation parameters $S_{\text{CP}}$ and $A_{\text{CP}}$ from $B^0 \to J/\psi K^0_S$ decays reconstructed by the Belle II experiment at the SuperKEKB asymmetric-energy electron-positron collider. The data, collected at the center-of-mass energy of the $\Upsilon(4S)$ resonance, correspond to $190\text{fb}^{-1}$ of integrated luminosity. We measure ${S_{\text{CP}} = 0.720\pm0.062\pm0.016}$ and $A_{\text{CP}} = 0.094\pm0.044^{+0.042}_{-0.017}$, where the first uncertainties are statistical and the second systematic. In the Standard Model, $S_{\text{CP}}$ equals $\sin(2\phi_1)$ to a good approximation.
Measurement of the $B^0$ lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019-2021 Belle II data
Belle II Collaboration, F. Abudinén, I. Adachi, L. Aggarwal, H. Ahmed, H. Aihara, N. Akopov, A. Aloisio, N. Anh Ky, D. M. Asner, H. Atmacan, T. Aushev, V. Aushev, H. Bae, S. Bahinipati, P. Bambade, Sw. Banerjee, S. Bansal, M. Barrett, J. Baudot, et al (376)
Feb 27 2023 hep-ex arXiv:2302.12791v2

@misc{2302.12791, author = {Belle II Collaboration and F.~Abudinén and I.~Adachi and L.~Aggarwal and H.~Ahmed and H.~Aihara and N.~Akopov and A.~Aloisio and N.~Anh Ky and D.~M.~Asner and H.~Atmacan and T.~Aushev and V.~Aushev and H.~Bae and S.~Bahinipati and P.~Bambade and Sw.~Banerjee and S.~Bansal and M.~Barrett and J.~Baudot and M.~Bauer and A.~Baur and A.~Beaubien and J.~Becker and J.~V.~Bennett and E.~Bernieri and F.~U.~Bernlochner and V.~Bertacchi and M.~Bertemes and E.~Bertholet and M.~Bessner and S.~Bettarini and V.~Bhardwaj and B.~Bhuyan and F.~Bianchi and T.~Bilka and S.~Bilokin and D.~Biswas and A.~Bobrov and D.~Bodrov and J.~Borah and A.~Bozek and M.~Bračko and R.~A.~Briere and T.~E.~Browder and A.~Budano and S.~Bussino and M.~Campajola and L.~Cao and G.~Casarosa and C.~Cecchi and J.~Cerasoli and P.~Chang and P.~Cheema and V.~Chekelian and C.~Chen and B.~G.~Cheon and K.~Chilikin and K.~Chirapatpimol and H.-E.~Cho and K.~Cho and S.-J.~Cho and S.-K.~Choi and S.~Choudhury and J.~Cochran and L.~Corona and S.~Cunliffe and F.~Dattola and E.~De La Cruz-Burelo and S.~A.~De La Motte and G.~de Marino and G.~De Nardo and M.~De Nuccio and G.~De Pietro and R.~de Sangro and M.~Destefanis and A.~De Yta-Hernandez and R.~Dhamija and A.~Di Canto and F.~Di Capua and J.~Dingfelder and Z.~Doležal and I.~Domínguez Jiménez and T.~V.~Dong and M.~Dorigo and K.~Dort and D.~Dossett and S.~Dreyer and S.~Dubey and G.~Dujany and P.~Ecker and M.~Eliachevitch and D.~Epifanov and P.~Feichtinger and T.~Ferber and D.~Ferlewicz and T.~Fillinger and G.~Finocchiaro and A.~Fodor and F.~Forti and A.~Frey and B.~G.~Fulsom and A.~Gabrielli and E.~Ganiev and M.~Garcia-Hernandez and G.~Gaudino and V.~Gaur and A.~Gaz and A.~Gellrich and G.~Ghevondyan and D.~Ghosh and G.~Giakoustidis and R.~Giordano and A.~Giri and A.~Glazov and B.~Gobbo and R.~Godang and P.~Goldenzweig and W.~Gradl and T.~Grammatico and S.~Granderath and E.~Graziani and D.~Greenwald and Z.~Gruberová and T.~Gu and K.~Gudkova and S.~Halder and K.~Hara and T.~Hara and K.~Hayasaka and H.~Hayashii and S.~Hazra and C.~Hearty and M.~T.~Hedges and I.~Heredia de la Cruz and M.~Hernández Villanueva and A.~Hershenhorn and T.~Higuchi and E.~C.~Hill and M.~Hohmann and C.-L.~Hsu and T.~Humair and T.~Iijima and K.~Inami and N.~Ipsita and A.~Ishikawa and S.~Ito and R.~Itoh and M.~Iwasaki and W.~W.~Jacobs and D.~E.~Jaffe and E.-J.~Jang and Q.~P.~Ji and S.~Jia and Y.~Jin and H.~Junkerkalefeld and M.~Kaleta and A.~B.~Kaliyar and K.~H.~Kang and G.~Karyan and T.~Kawasaki and C.~Kiesling and C.-H.~Kim and D.~Y.~Kim and K.-H.~Kim and Y.-K.~Kim and H.~Kindo and P.~Kodyš and T.~Koga and S.~Kohani and K.~Kojima and A.~Korobov and S.~Korpar and E.~Kovalenko and R.~Kowalewski and P.~Križan and P.~Krokovny and T.~Kuhr and J.~Kumar and R.~Kumar and K.~Kumara and T.~Kunigo and A.~Kuzmin and Y.-J.~Kwon and S.~Lacaprara and J.~S.~Lange and M.~Laurenza and R.~Leboucher and F.~R.~Le Diberder and P.~Leitl and D.~Levit and P.~M.~Lewis and L.~K.~Li and J.~Libby and Z.~Liptak and Q.~Y.~Liu and Z.~Q.~Liu and D.~Liventsev and S.~Longo and T.~Lueck and C.~Lyu and Y.~Ma and M.~Maggiora and S.~P.~Maharana and R.~Maiti and S.~Maity and R.~Manfredi and E.~Manoni and A.~C.~Manthei and M.~Mantovano and D.~Marcantonio and S.~Marcello and C.~Marinas and L.~Martel and C.~Martellini and A.~Martini and T.~Martinov and L.~Massaccesi and M.~Masuda and K.~Matsuoka and D.~Matvienko and S.~K.~Maurya and J.~A.~McKenna and F.~Meier and M.~Merola and F.~Metzner and M.~Milesi and C.~Miller and K.~Miyabayashi and H.~Miyake and R.~Mizuk and G.~B.~Mohanty and N.~Molina-Gonzalez and S.~Moneta and H.-G.~Moser and M.~Mrvar and R.~Mussa and I.~Nakamura and K.~R.~Nakamura and M.~Nakao and Y.~Nakazawa and A.~Narimani Charan and M.~Naruki and D.~Narwal and A.~Natochii and L.~Nayak and G.~Nazaryan and C.~Niebuhr and N.~K.~Nisar and S.~Nishida and S.~Ogawa and H.~Ono and Y.~Onuki and P.~Oskin and P.~Pakhlov and G.~Pakhlova and A.~Paladino and A.~Panta and S.~Pardi and K.~Parham and J.~Park and S.-H.~Park and B.~Paschen and A.~Passeri and S.~Patra and S.~Paul and T.~K.~Pedlar and I.~Peruzzi and R.~Peschke and R.~Pestotnik and F.~Pham and L.~E.~Piilonen and G.~Pinna Angioni and P.~L.~M.~Podesta-Lerma and T.~Podobnik and S.~Pokharel and L.~Polat and C.~Praz and S.~Prell and E.~Prencipe and M.~T.~Prim and H.~Purwar and N.~Rad and P.~Rados and G.~Raeuber and S.~Raiz and M.~Reif and S.~Reiter and I.~Ripp-Baudot and G.~Rizzo and L.~B.~Rizzuto and J.~M.~Roney and A.~Rostomyan and N.~Rout and Y.~Sakai and D.~A.~Sanders and S.~Sandilya and A.~Sangal and L.~Santelj and Y.~Sato and B.~Scavino and C.~Schmitt and C.~Schwanda and A.~J.~Schwartz and Y.~Seino and A.~Selce and K.~Senyo and J.~Serrano and M.~E.~Sevior and C.~Sfienti and W.~Shan and C.~Sharma and C.~P.~Shen and T.~Shillington and J.-G.~Shiu and D.~Shtol and F.~Simon and J.~B.~Singh and J.~Skorupa and R.~J.~Sobie and A.~Soffer and E.~Solovieva and S.~Spataro and B.~Spruck and M.~Starič and S.~Stefkova and R.~Stroili and Y.~Sue and M.~Sumihama and W.~Sutcliffe and S.~Y.~Suzuki and H.~Svidras and M.~Takahashi and M.~Takizawa and U.~Tamponi and S.~Tanaka and K.~Tanida and H.~Tanigawa and N.~Taniguchi and F.~Tenchini and R.~Tiwary and D.~Tonelli and E.~Torassa and K.~Trabelsi and I.~Tsaklidis and M.~Uchida and I.~Ueda and Y.~Uematsu and T.~Uglov and K.~Unger and Y.~Unno and K.~Uno and S.~Uno and P.~Urquijo and Y.~Ushiroda and S.~E.~Vahsen and R.~van Tonder and G.~S.~Varner and K.~E.~Varvell and A.~Vinokurova and V.~S.~Vismaya and L.~Vitale and V.~Vobbilisetti and A.~Vossen and M.~Wakai and H.~M.~Wakeling and S.~Wallner and E.~Wang and M.-Z.~Wang and X.~L.~Wang and Z.~Wang and A.~Warburton and M.~Watanabe and S.~Watanuki and M.~Welsch and C.~Wessel and E.~Won and X.~P.~Xu and B.~D.~Yabsley and S.~Yamada and W.~Yan and S.~B.~Yang and H.~Ye and J.~Yelton and J.~H.~Yin and Y.~M.~Yook and K.~Yoshihara and Y.~Yusa and L.~Zani and Y.~Zhai and Y.~Zhang and V.~Zhilich and Q.~D.~Zhou and X.~Y.~Zhou and V.~I.~Zhukova and R.~Žlebčík}, title = {{M}easurement of the ${B}^0$ lifetime and flavor-oscillation frequency using hadronic decays reconstructed in 2019-2021 {B}elle {II} data}, year = {2023}, eprint = {2302.12791}, note = {arXiv:2302.12791v2} }
PDF
We measure the $B^0$ lifetime and flavor-oscillation frequency using $B^0\to D^{(*)-}\pi^+$ decays collected by the Belle II experiment in asymmetric-energy $e^+e^-$ collisions produced by the SuperKEKB collider operating at the $\Upsilon(4S)$ resonance. We fit the decay-time distribution of signal decays, where the initial flavor is determined by identifying the flavor of the other $B$ meson in the event. The results, based on $33000$ signal decays reconstructed in a data sample corresponding to ${190}\text{fb}^{-1}$, are $\tau_{B^0} = {1.499}\pm{0.013}\pm{0.008}\;\text{ps}$, $\Delta m_d = {0.516}\pm{0.008}\pm{0.005}\;\text{ps}^{-1}$, where the first uncertainties are statistical and the second are systematic. These results are consistent with the world-average values.