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Sources of longitudinal flow decorrelations in high-energy nuclear collisions
Jiangyong Jia, Shengli Huang, Chunjian Zhang, Somadutta Bhatta
Aug 28 2024 nucl-th hep-ph nucl-ex arXiv:2408.15006v1

@misc{2408.15006, author = {Jiangyong Jia and Shengli Huang and Chunjian Zhang and Somadutta Bhatta}, title = {{S}ources of longitudinal flow decorrelations in high-energy nuclear collisions}, year = {2024}, eprint = {2408.15006}, note = {arXiv:2408.15006v1} }
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The longitudinal structure of the quark-gluon plasma (QGP) consists of several components spanning various scales. However, its short-range features are often obscured by final-state non-flow correlations. Here, we introduce a data-driven approach to separate initial state structures from non-flow effects. The longitudinal structure is found having two distinct components: one that reflects the global twisted geometry of the QGP, and another that captures localized fluctuations in rapidity. The characteristics of this second component, contributing to short- and medium-range flow decorrelations, can be quantified by comparing collisions of nuclei with different shapes. This study represents the first successful attempt to disentangle long- and short-range flow decorrelations from non-flow backgrounds, providing new insights into the initial conditions of heavy-ion collisions.
Longitudinal Structure of Quark-Gluon Plasma Unveiled Through Nuclear Deformations
Chunjian Zhang, Shengli Huang, Jiangyong Jia
May 15 2024 nucl-th hep-ph nucl-ex arXiv:2405.08749v1

@misc{2405.08749, author = {Chunjian Zhang and Shengli Huang and Jiangyong Jia}, title = {{L}ongitudinal {S}tructure of {Q}uark-{G}luon {P}lasma {U}nveiled {T}hrough {N}uclear {D}eformations}, year = {2024}, eprint = {2405.08749}, note = {arXiv:2405.08749v1} }
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The study of quark-gluon plasma (QGP) is hindered by our limited understanding of its initial conditions, particularly its longitudinal structure. We propose a novel approach that entails analyzing collisions involving nuclei of similar masses but different deformations. This strategy allows us to vary the initial conditions and collective expansion of the QGP, while minimizing the influence of non-flow correlations. Using a dynamical transport model, we have for the first time extracted the complete longitudinal structure of elliptic flow ($v_2$). Our findings reveal that although deformation significantly enhances the overall magnitude of $v_2$, it does not alter its longitudinal profile. This approach not only enables the separation of the rapidity dependence of flow from its rapidity decorrelations but also prompts further investigation into other nuclear structural features, such as nuclear skin thickness, to advance our understanding of the QGP's initial conditions.
$Ab$-$initio$ nucleon-nucleon correlations and their impact on high energy $^{16}$O+$^{16}$O collisions
Chunjian Zhang, Jinhui Chen, Giuliano Giacalone, Shengli Huang, Jiangyong Jia, Yu-Gang Ma
Apr 15 2024 nucl-th hep-ex hep-ph arXiv:2404.08385v1

@misc{2404.08385, author = {Chunjian Zhang and Jinhui Chen and Giuliano Giacalone and Shengli Huang and Jiangyong Jia and Yu-Gang Ma}, title = {${A}b$-$initio$ nucleon-nucleon correlations and their impact on high energy $^{16}${O}+$^{16}${O} collisions}, year = {2024}, eprint = {2404.08385}, note = {arXiv:2404.08385v1} }
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Investigating nucleon-nucleon correlations inherent to the strong nuclear force is one of the core goals in nuclear physics research. We showcase the unique opportunities offered by collisions of $^{16}$O nuclei at high-energy facilities to reveal detailed many-body properties of the nuclear ground state. We interface existing knowledge about the geometry of $^{16}$O coming from \textitab-initio calculations of nuclear structure with transport simulations of high-energy $^{16}$O+$^{16}$O collisions. Bulk observables in these processes, such as the elliptic flow or the fluctuations of the mean transverse momentum, are found to depend significantly on the input nuclear model and to be sensitive to realistic clustering and short-range repulsive correlations, effectively opening a new avenue to probe these features experimentally. This finding demonstrates collisions of oxygen nuclei as a tool to elucidate initial conditions of small collision systems while fostering connections with effective field theories of nuclei rooted in quantum chromodynamics (QCD).
Measurements of azimuthal anisotropies in $^{16}$O+$^{16}$O and $\gamma$+Au collisions from STAR
Shengli Huang
Dec 20 2023 nucl-ex nucl-th arXiv:2312.12167v1

@misc{2312.12167, author = {Shengli Huang}, title = {{M}easurements of azimuthal anisotropies in $^{16}${O}+$^{16}${O} and $\gamma$+{A}u collisions from {STAR}}, year = {2023}, eprint = {2312.12167}, note = {arXiv:2312.12167v1} }
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In this proceeding, we present the first measurements of azimuthal anisotropies, $v_2$ and $v_3$, in $^{16}$O+$^{16}$O collisions at 200 GeV as a function of transverse momentum and multiplicity, by using two- and four-particle correlation methods. We compare our measurements with STAR measurements of $v_n$ in \dau and \heau collisions to provide insight into the impact of system symmetry on initial condition for small systems. We also investigate the ratio $v_2\{4\}/v_2\{2\}$ as a function of centrality, which is expected to be sensitive to nucleon-nucleon correlation in the $^{16}$O nucleus.
Measurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in $p$+$p$ collisions at $\sqrt{s} =$ 200 GeV from STAR at RHIC
STAR Collaboration, M. I. Abdulhamid, B. E. Aboona, J. Adam, L. Adamczyk, J. R. Adams, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, E. C. Aschenauer, S. Aslam, J. Atchison, V. Bairathi, J. G. Ball Cap, K. Barish, R. Bellwied, P. Bhagat, A. Bhasin, S. Bhatta, S. R. Bhosale, et al (343)
Nov 03 2023 nucl-ex hep-ex hep-ph nucl-th arXiv:2311.00934v2

@misc{2311.00934, author = {STAR Collaboration and M.~I.~Abdulhamid and B.~E.~Aboona and J.~Adam and L.~Adamczyk and J.~R.~Adams and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and E.~C.~Aschenauer and S.~Aslam and J.~Atchison and V.~Bairathi and J.~G.~Ball Cap and K.~Barish and R.~Bellwied and P.~Bhagat and A.~Bhasin and S.~Bhatta and S.~R.~Bhosale and J.~Bielcik and J.~Bielcikova and J.~D.~Brandenburg and C.~Broodo and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and J.~Ceska and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and Z.~Chang and A.~Chatterjee and D.~Chen and J.~Chen and J.~H.~Chen and Z.~Chen and J.~Cheng and Y.~Cheng and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and G.~Dale-Gau and A.~Das and I.~M.~Deppner and A.~Dhamija and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and O.~Eyser and R.~Fatemi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and F.~A.~Flor and C.~Fu and C.~A.~Gagliardi and T.~Galatyuk and T.~Gao and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison-Smith and W.~He and X.~H.~He and Y.~He and N.~Herrmann and L.~Holub and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and Y.~Huang and Y.~Huang and T.~J.~Humanic and M.~Isshiki and W.~W.~Jacobs and A.~Jalotra and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and C.~Jin and X.~Ju and E.~G.~Judd and S.~Kabana and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and D.~Keane and A.~Khanal and Y.~V.~Khyzhniak and D.~P.~Kikoła and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and J.~Kołaś and L.~K.~Kosarzewski and L.~Kumar and M.~C.~Labonte and R.~Lacey and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and J.~H.~Lee and Y.~H.~Leung and C.~Li and D.~Li and H-S.~Li and H.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and Z.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and C.~Liu and G.~Liu and H.~Liu and L.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and O.~Lomicky and R.~S.~Longacre and E.~M.~Loyd and T.~Lu and J.~Luo and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and R.~Manikandhan and S.~Margetis and C.~Markert and O.~Matonoha and G.~McNamara and O.~Mezhanska and K.~Mi and S.~Mioduszewski and B.~Mohanty and B.~Mondal and M.~M.~Mondal and I.~Mooney and J.~Mrazkova and M.~I.~Nagy and A.~S.~Nain and J.~D.~Nam and M.~Nasim and D.~Neff and J.~M.~Nelson and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and T.~Nonaka and G.~Odyniec and A.~Ogawa and S.~Oh and K.~Okubo and B.~S.~Page and S.~Pal and A.~Pandav and A.~Panday and T.~Pani and A.~Paul and B.~Pawlik and D.~Pawlowska and C.~Perkins and J.~Pluta and B.~R.~Pokhrel and M.~Posik and T.~Protzman and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and Z.~Qin and H.~Qiu and C.~Racz and S.~K.~Radhakrishnan and A.~Rana and R.~L.~Ray and R.~Reed and C.~W.~Robertson and M.~Robotkova and M.~A.~Rosales Aguilar and D.~Roy and P.~Roy Chowdhury and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and S.~Sato and B.~C.~Schaefer and W.~B.~Schmidke and N.~Schmitz and F-J.~Seck and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and P.~V.~Shanmuganathan and T.~Shao and M.~Sharma and N.~Sharma and R.~Sharma and S.~R.~Sharma and A.~I.~Sheikh and D.~Shen and D.~Y.~Shen and K.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and F.~Si and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and Y.~Song and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and Y.~Su and M.~Sumbera and C.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and M.~Svoboda and Z.~W.~Sweger and A.~C.~Tamis and A.~H.~Tang and Z.~Tang and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and S.~Trentalange and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and C.~Y.~Tsang and Z.~Tu and J.~Tyler and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~A.~Voloshin and G.~Wang and J.~S.~Wang and J.~Wang and K.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and D.~Wielanek and H.~Wieman and G.~Wilks and S.~W.~Wissink and R.~Witt and J.~Wu and J.~Wu and X.~Wu and X.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and Z.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and W.~Zhang and X.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and S.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{M}easurements of charged-particle multiplicity dependence of higher-order net-proton cumulants in $p$+$p$ collisions at $\sqrt{s} =$ 200 {G}e{V} from {STAR} at {RHIC}}, year = {2023}, eprint = {2311.00934}, doi = {10.1016/j.physletb.2024.138966}, note = {arXiv:2311.00934v2} }
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We report on the charged-particle multiplicity dependence of net-proton cumulant ratios up to sixth order from $\sqrt{s}=200$ GeV $p$+$p$ collisions at the Relativistic Heavy Ion Collider (RHIC). The measured ratios $C_{4}/C_{2}$, $C_{5}/C_{1}$, and $C_{6}/C_{2}$ decrease with increased charged-particle multiplicity and rapidity acceptance. Neither the Skellam baselines nor PYTHIA8 calculations account for the observed multiplicity dependence. In addition, the ratios $C_{5}/C_{1}$ and $C_{6}/C_{2}$ approach negative values in the highest-multiplicity events, which implies that thermalized QCD matter may be formed in $p$+$p$ collisions.
Estimate of Background Baseline and Upper Limit on the Chiral Magnetic Effect in Isobar Collisions at $\sqrt{s_{\text{NN}}}=200$ GeV at the Relativistic Heavy-Ion Collider
STAR Collaboration, M. I. Abdulhamid, B. E. Aboona, J. Adam, J. R. Adams, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, A. Aitbaev, I. Alekseev, E. Alpatov, A. Aparin, S. Aslam, J. Atchison, G. S. Averichev, V. Bairathi, J. G. Ball Cap, K. Barish, P. Bhagat, et al (338)
Oct 23 2023 nucl-ex nucl-th arXiv:2310.13096v2

@misc{2310.13096, author = {STAR Collaboration and M.~I.~Abdulhamid and B.~E.~Aboona and J.~Adam and J.~R.~Adams and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and A.~Aitbaev and I.~Alekseev and E.~Alpatov and A.~Aparin and S.~Aslam and J.~Atchison and G.~S.~Averichev and V.~Bairathi and J.~G.~Ball Cap and K.~Barish and P.~Bhagat and A.~Bhasin and S.~Bhatta and S.~R.~Bhosale and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and C.~Broodo and X.~Z.~Cai and H.~Caines and M.~Calderón~de~la~Barca~Sánchez and D.~Cebra and J.~Ceska and I.~Chakaberia and B.~K.~Chan and Z.~Chang and A.~Chatterjee and D.~Chen and J.~Chen and J.~H.~Chen and Z.~Chen and J.~Cheng and Y.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and G.~Dale-Gau and A.~Das and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and O.~Eyser and R.~Fatemi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and F.~A.~Flor and C.~Fu and T.~Gao and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and A.~Hamed and Y.~Han and M.~D.~Harasty and J.~W.~Harris and H.~Harrison-Smith and W.~He and X.~H.~He and Y.~He and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and Y.~Huang and T.~J.~Humanic and M.~Isshiki and W.~W.~Jacobs and A.~Jalotra and C.~Jena and Y.~Ji and J.~Jia and C.~Jin and X.~Ju and E.~G.~Judd and S.~Kabana and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and D.~Keane and A.~Kechechyan and A.~Khanal and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~Kochenda and A.~A.~Korobitsin and A.~Yu.~Kraeva and P.~Kravtsov and L.~Kumar and M.~C.~Labonte and R.~Lacey and J.~M.~Landgraf and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and D.~Li and H-S.~Li and H.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and Z.~Li and X.~Liang and Y.~Liang and T.~Lin and Y.~Lin and C.~Liu and G.~Liu and H.~Liu and L.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and O.~Lomicky and R.~S.~Longacre and E.~M.~Loyd and T.~Lu and J.~Luo and X.~F.~Luo and V.~B.~Luong and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Manikandhan and S.~Margetis and H.~S.~Matis and G.~McNamara and O.~Mezhanska and K.~Mi and N.~G.~Minaev and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mudrokh and M.~I.~Nagy and A.~S.~Nain and J.~D.~Nam and M.~Nasim and E.~Nedorezov and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and K.~Okubo and B.~S.~Page and R.~Pak and S.~Pal and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and T.~Pani and P.~Parfenov and A.~Paul and C.~Perkins and B.~R.~Pokhrel and M.~Posik and A.~Povarov and T.~Protzman and N.~K.~Pruthi and J.~Putschke and Z.~Qin and H.~Qiu and C.~Racz and S.~K.~Radhakrishnan and A.~Rana and R.~L.~Ray and H.~G.~Ritter and C.~W.~Robertson and O.~V.~Rogachevsky and M.~A.~Rosales Aguilar and D.~Roy and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and E.~Samigullin and S.~Sato and B.~C.~Schaefer and W.~B.~Schmidke and N.~Schmitz and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and T.~Shao and M.~Sharma and N.~Sharma and R.~Sharma and S.~R.~Sharma and A.~I.~Sheikh and D.~Shen and D.~Y.~Shen and K.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and F.~Si and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and Y.~Söhngen and Y.~Song and B.~Srivastava and T.~D.~S.~Stanislaus and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and Y.~Su and C.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and A.~C.~Tamis and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and D.~Tlusty and T.~Todoroki and M.~V.~Tokarev and S.~Trentalange and P.~Tribedy and O.~D.~Tsai and C.~Y.~Tsang and Z.~Tu and J.~Tyler and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and A.~N.~Vasiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and J.~Wang and K.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and H.~Wieman and G.~Wilks and S.~W.~Wissink and J.~Wu and J.~Wu and X.~Wu and X and Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and Z.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and W.~Zhang and X.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and J.~Zhou and S.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{E}stimate of {B}ackground {B}aseline and {U}pper {L}imit on the {C}hiral {M}agnetic {E}ffect in {I}sobar {C}ollisions at $\sqrt{s_{\text{{NN}}}}=200$ {G}e{V} at the {R}elativistic {H}eavy-{I}on {C}ollider}, year = {2023}, eprint = {2310.13096}, howpublished = {Phys. Rev. C 110, 014905 (2024)}, doi = {10.1103/PhysRevC.110.014905}, note = {arXiv:2310.13096v2} }
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For the search of the chiral magnetic effect (CME), STAR previously presented the results from isobar collisions (${^{96}_{44}\text{Ru}}+{^{96}_{44}\text{Ru}}$, ${^{96}_{40}\text{Zr}}+{^{96}_{40}\text{Zr}}$) obtained through a blind analysis. The ratio of results in Ru+Ru to Zr+Zr collisions for the CME-sensitive charge-dependent azimuthal correlator ($\Delta\gamma$), normalized by elliptic anisotropy ($v_{2}$), was observed to be close to but systematically larger than the inverse multiplicity ratio. The background baseline for the isobar ratio, $Y = \frac{(\Delta\gamma/v_{2})^{\text{Ru}}}{(\Delta\gamma/v_{2})^{\text{Zr}}}$, is naively expected to be $\frac{(1/N)^{\text{Ru}}}{(1/N)^{\text{Zr}}}$; however, genuine two- and three-particle correlations are expected to alter it. We estimate the contributions to $Y$ from those correlations, utilizing both the isobar data and HIJING simulations. After including those contributions, we arrive at a final background baseline for $Y$, which is consistent with the isobar data. We extract an upper limit for the CME fraction in the $\Delta\gamma$ measurement of approximately $10\%$ at a $95\%$ confidence level on in isobar collisions at $\sqrt{s_{\text{NN}}} = 200$ GeV, with an expected $15\%$ difference in their squared magnetic fields.
Upper Limit on the Chiral Magnetic Effect in Isobar Collisions at the Relativistic Heavy-Ion Collider
STAR Collaboration, M. I. Abdulhamid, B. E. Aboona, J. Adam, J. R. Adams, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, A. Aitbaev, I. Alekseev, E. Alpatov, A. Aparin, S. Aslam, J. Atchison, G. S. Averichev, V. Bairathi, J. G. Ball Cap, K. Barish, P. Bhagat, et al (338)
Sep 01 2023 nucl-ex nucl-th arXiv:2308.16846v2

@misc{2308.16846, author = {STAR Collaboration and M.~I.~Abdulhamid and B.~E.~Aboona and J.~Adam and J.~R.~Adams and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and A.~Aitbaev and I.~Alekseev and E.~Alpatov and A.~Aparin and S.~Aslam and J.~Atchison and G.~S.~Averichev and V.~Bairathi and J.~G.~Ball Cap and K.~Barish and P.~Bhagat and A.~Bhasin and S.~Bhatta and S.~R.~Bhosale and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and C.~Broodo and X.~Z.~Cai and H.~Caines and M.~Calderón~de~la~Barca~Sánchez and D.~Cebra and J.~Ceska and I.~Chakaberia and B.~K.~Chan and Z.~Chang and A.~Chatterjee and D.~Chen and J.~Chen and J.~H.~Chen and Z.~Chen and J.~Cheng and Y.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and G.~Dale-Gau and A.~Das and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and O.~Eyser and R.~Fatemi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and F.~A.~Flor and C.~Fu and T.~Gao and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and A.~Hamed and Y.~Han and M.~D.~Harasty and J.~W.~Harris and H.~Harrison-Smith and W.~He and X.~H.~He and Y.~He and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and Y.~Huang and T.~J.~Humanic and M.~Isshiki and W.~W.~Jacobs and A.~Jalotra and C.~Jena and Y.~Ji and J.~Jia and C.~Jin and X.~Ju and E.~G.~Judd and S.~Kabana and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and D.~Keane and A.~Kechechyan and A.~Khanal and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~Kochenda and A.~A.~Korobitsin and A.~Yu.~Kraeva and P.~Kravtsov and L.~Kumar and M.~C.~Labonte and R.~Lacey and J.~M.~Landgraf and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and D.~Li and H-S.~Li and H.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and Z.~Li and X.~Liang and Y.~Liang and T.~Lin and Y.~Lin and C.~Liu and G.~Liu and H.~Liu and L.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and O.~Lomicky and R.~S.~Longacre and E.~M.~Loyd and T.~Lu and J.~Luo and X.~F.~Luo and V.~B.~Luong and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Manikandhan and S.~Margetis and H.~S.~Matis and G.~McNamara and O.~Mezhanska and K.~Mi and N.~G.~Minaev and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mudrokh and M.~I.~Nagy and A.~S.~Nain and J.~D.~Nam and M.~Nasim and E.~Nedorezov and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and K.~Okubo and B.~S.~Page and R.~Pak and S.~Pal and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and T.~Pani and P.~Parfenov and A.~Paul and C.~Perkins and B.~R.~Pokhrel and M.~Posik and A.~Povarov and T.~Protzman and N.~K.~Pruthi and J.~Putschke and Z.~Qin and H.~Qiu and C.~Racz and S.~K.~Radhakrishnan and A.~Rana and R.~L.~Ray and H.~G.~Ritter and C.~W.~Robertson and O.~V.~Rogachevsky and M.~A.~Rosales Aguilar and D.~Roy and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and E.~Samigullin and S.~Sato and B.~C.~Schaefer and W.~B.~Schmidke and N.~Schmitz and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and T.~Shao and M.~Sharma and N.~Sharma and R.~Sharma and S.~R.~Sharma and A.~I.~Sheikh and D.~Shen and D.~Y.~Shen and K.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and F.~Si and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and Y.~Söhngen and Y.~Song and B.~Srivastava and T.~D.~S.~Stanislaus and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and Y.~Su and C.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and A.~C.~Tamis and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and D.~Tlusty and T.~Todoroki and M.~V.~Tokarev and S.~Trentalange and P.~Tribedy and O.~D.~Tsai and C.~Y.~Tsang and Z.~Tu and J.~Tyler and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and A.~N.~Vasiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and J.~Wang and K.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and H.~Wieman and G.~Wilks and S.~W.~Wissink and J.~Wu and J.~Wu and X.~Wu and X and Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and Z.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and W.~Zhang and X.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and J.~Zhou and S.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{U}pper {L}imit on the {C}hiral {M}agnetic {E}ffect in {I}sobar {C}ollisions at the {R}elativistic {H}eavy-{I}on {C}ollider}, year = {2023}, eprint = {2308.16846}, howpublished = {Phys. Rev. Research 6, L032005 (2024)}, doi = {10.1103/PhysRevResearch.6.L032005}, note = {arXiv:2308.16846v2} }
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The chiral magnetic effect (CME) is a phenomenon that arises from the QCD anomaly in the presence of an external magnetic field. The experimental search for its evidence has been one of the key goals of the physics program of the Relativistic Heavy-Ion Collider. The STAR collaboration has previously presented the results of a blind analysis of isobar collisions (${^{96}_{44}\text{Ru}}+{^{96}_{44}\text{Ru}}$, ${^{96}_{40}\text{Zr}}+{^{96}_{40}\text{Zr}}$) in the search for the CME. The isobar ratio ($Y$) of CME-sensitive observable, charge separation scaled by elliptic anisotropy, is close to but systematically larger than the inverse multiplicity ratio, the naive background baseline. This indicates the potential existence of a CME signal and the presence of remaining nonflow background due to two- and three-particle correlations, which are different between the isobars. In this post-blind analysis, we estimate the contributions from those nonflow correlations as a background baseline to $Y$, utilizing the isobar data as well as Heavy Ion Jet Interaction Generator simulations. This baseline is found consistent with the isobar ratio measurement, and an upper limit of 10% at 95% confidence level is extracted for the CME fraction in the charge separation measurement in isobar collisions at $\sqrt{s_{\rm NN}}=200$ GeV.
R-process beta-decay neutrino flux from binary neutron star mergers and collapsars
Yu An, Meng-Ru Wu, Gang Guo, Yue-Lin Sming Tsai, Shih-Jie Huang, Yi-Zhong Fan
Jun 14 2023 astro-ph.HE nucl-th arXiv:2306.07659v2

@misc{2306.07659, author = {Yu An and Meng-Ru Wu and Gang Guo and Yue-Lin Sming Tsai and Shih-Jie Huang and Yi-Zhong Fan}, title = {{R}-process beta-decay neutrino flux from binary neutron star mergers and collapsars}, year = {2023}, eprint = {2306.07659}, note = {arXiv:2306.07659v2} }
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This study investigates the antineutrinos production by $\beta$-decay of $r$-process nuclei in two astrophysical sites that are capable of producing gamma-ray bursts (GRBs): binary neutron star mergers (BNSMs) and collapsars, which are promising sites for heavy element nucleosynthesis. We employ a simplified method to compute the $\beta$-decay $\bar\nu_e$ energy spectrum and consider a number of different representative thermodynamic trajectories for $r$-process simulations, each with four sets of $Y_e$ distribution. The time evolution of the $\bar\nu_e$ spectrum is derived for both the dynamical ejecta and the disk wind for BNSMs and collapsar outflow, based on approximated mass outflow rates. Our results show that the $\bar\nu_e$ has an average energy of approximately 3 to 9~MeV, with a high energy tail of up to 20 MeV. The $\bar\nu_e$ flux evolution is primarily determined by the outflow duration, and can thus remain large for $\mathcal{O}(10)$~s and $\mathcal{O}(100)$~s for BNSMs and collapsars, respectively. For a single merger or collapsar at 40~Mpc, the $\bar\nu_e$ flux is $\mathcal{O}(10-100)$~cm$^{-2}$~s$^{-1}$, indicating a possible detection horizon up to $0.1-1$~Mpc for Hyper-Kamiokande. We also estimate their contributions to the diffuse $\bar\nu_e$ background, and find that both sources should only contribute subdominantly to the diffuse background when compared to that expected from core-collapse supernovae.
The Present and Future of QCD
P. Achenbach, D. Adhikari, A. Afanasev, F. Afzal, C.A. Aidala, A. Al-bataineh, D.K. Almaalol, M. Amaryan, D. Androić, W.R. Armstrong, M. Arratia, J. Arrington, A. Asaturyan, E.C. Aschenauer, H. Atac, H. Avakian, T. Averett, C. Ayerbe Gayoso, X. Bai, K.N. Barish, et al (383)
Mar 07 2023 hep-ph hep-ex nucl-ex nucl-th arXiv:2303.02579v1

@misc{2303.02579, author = {P.~Achenbach and D.~Adhikari and A.~Afanasev and F.~Afzal and C.A.~Aidala and A.~Al-bataineh and D.K.~Almaalol and M.~Amaryan and D.~Androić and W.R.~Armstrong and M.~Arratia and J.~Arrington and A.~Asaturyan and E.C.~Aschenauer and H.~Atac and H.~Avakian and T.~Averett and C.~Ayerbe Gayoso and X.~Bai and K.N.~Barish and N.~Barnea and G.~Basar and M.~Battaglieri and A.A.~Baty and I.~Bautista and A.~Bazilevsky and C.~Beattie and S.C.~Behera and V.~Bellini and R.~Bellwied and J.F.~Benesch and F.~Benmokhtar and C.A.~Bernardes and J.C.~Bernauer and H.~Bhatt and S.~Bhatta and M.~Boer and T.J.~Boettcher and S.A.~Bogacz and H.J.~Bossi and J.D.~Brandenburg and E.J.~Brash and R.A.~Briceño and W.J.~Briscoe and S.J.~Brodsky and D.A.~Brown and V.D.~Burkert and H.~Caines and I.A.~Cali and A.~Camsonne and D.S.~Carman and J.~Caylor and S.~Cerci and M.~Chamizo Llatas and S.~Chatterjee and J.P.~Chen and Y.~Chen and Y.-C.~Chen and Y.-T.~Chien and P.-C.~Chou and X.~Chu and E.~Chudakov and E.~Cline and I.C.~Cloët and P.L.~Cole and M.E.~Connors and M.~Constantinou and W.~Cosyn and S.~Covrig Dusa and R.~Cruz-Torres and U.~D'Alesio and C.~da Silva and Z.~Davoudi and C.T.~Dean and D.J.~Dean and M.~Demarteau and A.~Deshpande and W.~Detmold and A.~Deur and B.R.~Devkota and S.~Dhital and M.~Diefenthaler and S.~Dobbs and M.~Döring and X.~Dong and R.~Dotel and K.A.~Dow and E.J.~Downie and J.L.~Drachenberg and A.~Dumitru and J.C.~Dunlop and R.~Dupre and J.M.~Durham and D.~Dutta and R.G.~Edwards and R.J.~Ehlers and L.~El Fassi and M.~Elaasar and L.~Elouadrhiri and M.~Engelhardt and R.~Ent and S.~Esumi and O.~Evdokimov and O.~Eyser and C.~Fanelli and R.~Fatemi and I.P.~Fernando and F.A.~Flor and N.~Fomin and A.D.~Frawley and T.~Frederico and R.J.~Fries and C.~Gal and B.R.~Gamage and L.~Gamberg and H.~Gao and D.~Gaskell and F.~Geurts and Y.~Ghandilyan and N.~Ghimire and R.~Gilman and C.~Gleason and K.~Gnanvo and R.W.~Gothe and S.V.~Greene and H.W.~Grießhammer and S.K.~Grossberndt and B.~Grube and D.C.~Hackett and T.J.~Hague and H.~Hakobyan and J.-O.~Hansen and Y.~Hatta and M.~Hattawy and L.B.~Havener and O.~Hen and W.~Henry and D.W.~Higinbotham and T.J.~Hobbs and A.M.~Hodges and T.~Holmstrom and B.~Hong and T.~Horn and C.R.~Howell and H.Z.~Huang and M.~Huang and S.~Huang and G.M.~Huber and C.E.~Hyde and E.L.~Isupov and P.M.~Jacobs and J.~Jalilian-Marian and A.~Jentsch and H.~Jheng and C.-R.~Ji and X.~Ji and J.~Jia and D.C.~Jones and M.K.~Jones and N.~Kalantarians and G.~Kalicy and Z.B.~Kang and J.M.~Karthein and D.~Keller and C.~Keppel and V.~Khachatryan and D.E.~Kharzeev and H.~Kim and M.~Kim and Y.~Kim and P.M.~King and E.~Kinney and S.R.~Klein and H.S.~Ko and V.~Koch and M.~Kohl and Y.V.~Kovchegov and G.K.~Krintiras and V.~Kubarovsky and S.E.~Kuhn and K.S.~Kumar and T.~Kutz and J.G.~Lajoie and J.~Lauret and I.~Lavrukhin and D.~Lawrence and J.H.~Lee and K.~Lee and S.~Lee and Y.-J.~Lee and S.~Li and W.~Li and Xiaqing Li and Xuan Li and J.~Liao and H.-W.~Lin and M.A.~Lisa and K.-F.~Liu and M.X.~Liu and T.~Liu and S.~Liuti and N.~Liyanage and W.J.~Llope and C.~Loizides and R.~Longo and W.~Lorenzon and S.~Lunkenheimer and X.~Luo and R.~Ma and B.~McKinnon and D.G.~Meekins and Y.~Mehtar-Tani and W.~Melnitchouk and A.~Metz and C.A.~Meyer and Z.-E.~Meziani and R.~Michaels and J.K.L.~Michel and R.G.~Milner and H.~Mkrtchyan and P.~Mohanmurthy and B.~Mohanty and V.~I.~Mokeev and D.H.~Moon and I.A.~Mooney and C.~Morningstar and D.P.~Morrison and B.~Müller and S.~Mukherjee and J.~Mulligan and C.~Munoz Camacho and J.A.~Murillo Quijada and M.J.~Murray and S.A.~Nadeeshani and P.~Nadel-Turonski and J.D.~Nam and C.E.~Nattrass and G.~Nijs and J.~Noronha and J.~Noronha-Hostler and N.~Novitzky and M.~Nycz and F.I.~Olness and J.D.~Osborn and R.~Pak and B.~Pandey and M.~Paolone and Z.~Papandreou and J.-F.~Paquet and S.~Park and K.D.~Paschke and B.~Pasquini and E.~Pasyuk and T.~Patel and A.~Patton and C.~Paudel and C.~Peng and J.C.~Peng and H.~Pereira Da Costa and D.V.~Perepelitsa and M.J.~Peters and P.~Petreczky and R.~D.~Pisarski and D.~Pitonyak and M.A.~Ploskon and M.~Posik and J.~Poudel and R.~Pradhan and A.~Prokudin and C.A.~Pruneau and A.J.R.~Puckett and P.~Pujahari and J.~Putschke and J.R.~Pybus and J.-W.~Qiu and K.~Rajagopal and C.~Ratti and K.F.~Read and R.~Reed and D.G.~Richards and C.~Riedl and F.~Ringer and T.~Rinn and J.~Rittenhouse West and J.~Roche and A.~Rodas and G.~Roland and F.~Romero-López and P.~Rossi and T.~Rostomyan and L.~Ruan and O.~M.~Ruimi and N.R.~Saha and N.R.~Sahoo and T.~Sakaguchi and F.~Salazar and C.W.~Salgado and G.~Salmè and S.~Salur and S.N.~Santiesteban and M.M.~Sargsian and M.~Sarsour and N.~Sato and T.~Satogata and S.~Sawada and T.~Schäfer and B.~Scheihing-Hitschfeld and B.~Schenke and S.T.~Schindler and A.~Schmidt and R.~Seidl and M.H.~Shabestari and P.E.~Shanahan and C.~Shen and T.-A.~Sheng and M.R.~Shepherd and A.M.~Sickles and M.D.~Sievert and K.L.~Smith and Y.~Song and A.~Sorensen and P.A.~Souder and N.~Sparveris and S.~Srednyak and A.G.~Stahl Leiton and A.M.~Stasto and P.~Steinberg and S.~Stepanyan and M.~Stephanov and J.~R.~Stevens and D.~J.~Stewart and I.~W.~Stewart and M.~Stojanovic and I.~Strakovsky and S.~Strauch and M.~Strickland and D.~Sunar Cerci and M.~Suresh and B.~Surrow and S.~Syritsyn and A.P.~Szczepaniak and A.S.~Tadepalli and A.H.~Tang and J.D.~Tapia Takaki and T.J.~Tarnowsky and A.N.~Tawfik and M.I.~Taylor and C.~Tennant and A.~Thiel and D.~Thomas and Y.~Tian and A.R.~Timmins and P.~Tribedy and Z.~Tu and S.~Tuo and T.~Ullrich and E.~Umaka and D.W.~Upton and J.P.~Vary and J.~Velkovska and R.~Venugopalan and A.~Vijayakumar and I.~Vitev and W.~Vogelsang and R.~Vogt and A.~Vossen and E.~Voutier and V.~Vovchenko and A.~Walker-Loud and F.~Wang and J.~Wang and X.~Wang and X.-N.~Wang and L.B.~Weinstein and T.J.~Wenaus and S.~Weyhmiller and S.W.~Wissink and B.~Wojtsekhowski and C.P.~Wong and M.H.~Wood and Y.~Wunderlich and B.~Wyslouch and B.W.~Xiao and W.~Xie and W.~Xiong and N.~Xu and Q.H.~Xu and Z.~Xu and D.~Yaari and X.~Yao and Z.~Ye and Z.H.~Ye and C.~Yero and F.~Yuan and W.A.~Zajc and C.~Zhang and J.~Zhang and F.~Zhao and Y.~Zhao and Z.W.~Zhao and X.~Zheng and J.~Zhou and M.~Zurek}, title = {{T}he {P}resent and {F}uture of {QCD}}, year = {2023}, eprint = {2303.02579}, note = {arXiv:2303.02579v1} }
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This White Paper presents the community inputs and scientific conclusions from the Hot and Cold QCD Town Meeting that took place September 23-25, 2022 at MIT, as part of the Nuclear Science Advisory Committee (NSAC) 2023 Long Range Planning process. A total of 424 physicists registered for the meeting. The meeting highlighted progress in Quantum Chromodynamics (QCD) nuclear physics since the 2015 LRP (LRP15) and identified key questions and plausible paths to obtaining answers to those questions, defining priorities for our research over the coming decade. In defining the priority of outstanding physics opportunities for the future, both prospects for the short (~ 5 years) and longer term (5-10 years and beyond) are identified together with the facilities, personnel and other resources needed to maximize the discovery potential and maintain United States leadership in QCD physics worldwide. This White Paper is organized as follows: In the Executive Summary, we detail the Recommendations and Initiatives that were presented and discussed at the Town Meeting, and their supporting rationales. Section 2 highlights major progress and accomplishments of the past seven years. It is followed, in Section 3, by an overview of the physics opportunities for the immediate future, and in relation with the next QCD frontier: the EIC. Section 4 provides an overview of the physics motivations and goals associated with the EIC. Section 5 is devoted to the workforce development and support of diversity, equity and inclusion. This is followed by a dedicated section on computing in Section 6. Section 7 describes the national need for nuclear data science and the relevance to QCD research.
Higher-Order Cumulants and Correlation Functions of Proton Multiplicity Distributions in $\sqrt{s_{\mathrm{NN}}}$ = 3 GeV Au+Au Collisions at the RHIC STAR Experiment
STAR Collaboration, M. S. Abdallah, B. E. Aboona, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, D. M. Anderson, E. C. Aschenauer, J. Atchison, V. Bairathi, W. Baker, J. G. Ball Cap, K. Barish, R. Bellwied, P. Bhagat, A. Bhasin, et al (354)
Sep 27 2022 nucl-ex hep-ex hep-lat hep-ph nucl-th arXiv:2209.11940v2

@misc{2209.11940, author = {STAR Collaboration and M.~S.~Abdallah and B.~E.~Aboona and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and D.~M.~Anderson and E.~C.~Aschenauer and J.~Atchison and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and R.~Bellwied and P.~Bhagat and A.~Bhasin and S.~Bhatta and J.~Bielcik and J.~Bielcikova and J.~D.~Brandenburg and X.~Z.~Cai and H.~Caines and M.~Calderón~de~la~Barca~Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and Z.~Chang and A.~Chatterjee and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and Y.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and I.~M.~Deppner and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and D.~Isenhower and M.~Isshiki and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and K.~Jiang and C.~Jin and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~K.~Kosarzewski and L.~Kramarik and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and Z.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and H.~Liu and T.~Liu and X.~Liu and Y.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and T.~Lu and N.~S.~Lukow and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and G.~McNamara and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and A.~Mukherjee and M.~I.~Nagy and A.~S.~Nain and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and T.~Niida and R.~Nishitani and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and K.~Okubo and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and T.~Pani and A.~Paul and B.~Pawlik and D.~Pawlowska and C.~Perkins and J.~Pluta and B.~R.~Pokhrel and J.~Porter and M.~Posik and T.~Protzman and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and Z.~Qin and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and M.~Robotkova and J.~L.~Romero and D.~Roy and P.~Roy Chowdhury and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and S.~Sato and W.~B.~Schmidke and N.~Schmitz and F-J.~Seck and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and R.~Sharma and A.~I.~Sheikh and D.~Y.~Shen and K.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and W.~Solyst and Y.~Song and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and C.~Sun and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and Z.~W.~Sweger and P.~Szymanski and A.~H.~Tang and Z.~Tang and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and C.~Y.~Tsang and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and D.~Wielanek and H.~Wieman and S.~W.~Wissink and R.~Witt and J.~Wu and J.~Wu and X.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and Z.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and S.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and C.~Zhou and J.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{H}igher-{O}rder {C}umulants and {C}orrelation {F}unctions of {P}roton {M}ultiplicity {D}istributions in $\sqrt{s_{\mathrm{{NN}}}}$ = 3 {G}e{V} {A}u+{A}u {C}ollisions at the {RHIC} {STAR} {E}xperiment}, year = {2022}, eprint = {2209.11940}, howpublished = {Phys. Rev. C 107, 024908(2023)}, doi = {10.1103/PhysRevC.107.024908}, note = {arXiv:2209.11940v2} }
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We report a measurement of cumulants and correlation functions of event-by-event proton multiplicity distributions from fixed-target Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 3 GeV measured by the STAR experiment. Protons are identified within the rapidity ($y$) and transverse momentum ($p_{\rm T}$) region $-0.9 < y<0$ and $0.4 < p_{\rm T} <2.0 $ GeV/$c$ in the center-of-mass frame. A systematic analysis of the proton cumulants and correlation functions up to sixth-order as well as the corresponding ratios as a function of the collision centrality, $p_{\rm T}$, and $y$ are presented. The effect of pileup and initial volume fluctuations on these observables and the respective corrections are discussed in detail. The results are compared to calculations from the hadronic transport UrQMD model as well as a hydrodynamic model. In the most central 5\% collisions, the value of proton cumulant ratio $C_4/C_2$ is negative, drastically different from the values observed in Au+Au collisions at higher energies. Compared to model calculations including Lattice QCD, a hadronic transport model, and a hydrodynamic model, the strong suppression in the ratio of $C_4/C_2$ at 3 GeV Au+Au collisions indicates an energy regime dominated by hadronic interactions.
Imaging the initial condition of heavy-ion collisions and nuclear structure across the nuclide chart
Benjamin Bally, James Daniel Brandenburg, Giuliano Giacalone, Ulrich Heinz, Shengli Huang, Jiangoyng Jia, Dean Lee, Yen-Jie Lee, Wei Li, Constantin Loizides, Matthew Luzum, Govert Nijs, Jacquelyn Noronha-Hostler, Mateusz Ploskon, Wilke van der Schee, Bjoern Schenke, Chun Shen, Vittorio Somà, Anthony Timmins, Zhangbu Xu, et al (1)
Sep 23 2022 nucl-ex hep-ph nucl-th arXiv:2209.11042v2

@misc{2209.11042, author = {Benjamin Bally and James Daniel Brandenburg and Giuliano Giacalone and Ulrich Heinz and Shengli Huang and Jiangoyng Jia and Dean Lee and Yen-Jie Lee and Wei Li and Constantin Loizides and Matthew Luzum and Govert Nijs and Jacquelyn Noronha-Hostler and Mateusz Ploskon and Wilke van der Schee and Bjoern Schenke and Chun Shen and Vittorio Somà and Anthony Timmins and Zhangbu Xu and You Zhou}, title = {{I}maging the initial condition of heavy-ion collisions and nuclear structure across the nuclide chart}, year = {2022}, eprint = {2209.11042}, note = {arXiv:2209.11042v2} }
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High-energy nuclear collisions encompass three key stages: the structure of the colliding nuclei informed by low-energy nuclear physics, the initial condition (IC) leading to the formation of quark-gluon plasma (QGP), and the hydrodynamic expansion and hadronization of the QGP leading to final-state hadrons observed experimentally. Recent advances in experimental and theoretical methods have ushered in a precision era, enabling an increasingly accurate understanding of these stages. However, most approaches involve simultaneously determining both QGP properties and initial conditions from a single collision system, creating complexity due to the coupled contributions of various stages to the final-state observables. To avoid this, we propose leveraging known knowledge of low-energy nuclear structure and hydrodynamic observables to constrain the IC independently. By conducting comparative studies of collisions involving isobar-like nuclei - species with similar mass numbers but different structures - we disentangle the initial condition's impacts from the QGP properties. This approach not only refines our understanding of the IC but also turns high-energy experiments into a precision tool for imaging nuclear structures, offering insights that complement traditional low-energy approaches. Opportunities for carrying out such comparative experiments at the LHC and other facilities could significantly advance both high-energy and low-energy nuclear physics. Additionally, this approach has implications for the future EIC. While the possibilities are extensive, we focus on selected proposals that could benefit both the high-energy and low-energy nuclear physics communities. Originally prepared as input for the long-range plan of U.S. nuclear physics, this white paper reflects the status as of September 2022, with a brief update on developments since then.
Beam Energy Dependence of Triton Production and Yield Ratio ($\mathrm{N}_t \times \mathrm{N}_p/\mathrm{N}_d^2$) in Au+Au Collisions at RHIC
STAR Collaboration, M. I. Abdulhamid, B. E. Aboona, J. Adam, J. R. Adams, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, A. Aitbaev, I. Alekseev, D. M. Anderson, A. Aparin, S. Aslam, J. Atchison, G. S. Averichev, V. Bairathi, W. Baker, J. G. Ball Cap, K. Barish, et al (338)
Sep 19 2022 nucl-ex hep-ex hep-ph hep-th nucl-th arXiv:2209.08058v2

@misc{2209.08058, author = {STAR Collaboration and M.~I.~Abdulhamid and B.~E.~Aboona and J.~Adam and J.~R.~Adams and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and A.~Aitbaev and I.~Alekseev and D.~M.~Anderson and A.~Aparin and S.~Aslam and J.~Atchison and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and P.~Bhagat and A.~Bhasin and S.~Bhatta and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and X.~Z.~Cai and H.~Caines and M.~Calderón~de~la~Barca~Sánchez and D.~Cebra and J.~Ceska and I.~Chakaberia and B.~K.~Chan and Z.~Chang and A.~Chatterjee and D.~Chen and J.~Chen and J.~H.~Chen and Z.~Chen and J.~Cheng and Y.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and G.~Dale-Gau and A.~Das and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and F.~A.~Flor and C.~Fu and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and A.~Hamed and Y.~Han and M.~D.~Harasty and J.~W.~Harris and H.~Harrison-Smith and W.~He and X.~H.~He and Y.~He and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and Y.~Huang and T.~J.~Humanic and D.~Isenhower and M.~Isshiki and W.~W.~Jacobs and A.~Jalotra and C.~Jena and Y.~Ji and J.~Jia and C.~Jin and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and B.~Kimelman and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~Kochenda and A.~A.~Korobitsin and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and R.~Lacey and J.~M.~Landgraf and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and Z.~Li and X.~Liang and Y.~Liang and T.~Lin and C.~Liu and F.~Liu and H.~Liu and H.~Liu and L.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and O.~Lomicky and R.~S.~Longacre and E.~M.~Loyd and T.~Lu and N.~S.~Lukow and X.~F.~Luo and V.~B.~Luong and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~Margetis and H.~S.~Matis and J.~A.~Mazer and G.~McNamara and K.~Mi and N.~G.~Minaev and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mudrokh and M.~I.~Nagy and A.~S.~Nain and J.~D.~Nam and Md.~Nasim and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and K.~Okubo and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and T.~Pani and P.~Parfenov and A.~Paul and C.~Perkins and B.~R.~Pokhrel and M.~Posik and T.~Protzman and N.~K.~Pruthi and J.~Putschke and Z.~Qin and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and H.~G.~Ritter and C.~W.~Robertson and O.~V.~Rogachevsky and M.~A.~Rosales Aguilar and D.~Roy and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and E.~Samigullin and S.~Sato and W.~B.~Schmidke and N.~Schmitz and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and T.~Shao and M.~Sharma and N.~Sharma and R.~Sharma and S.~R.~Sharma and A.~I.~Sheikh and D.~Y.~Shen and K.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and F.~Si and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and Y.~Söhngen and Y.~Song and B.~Srivastava and T.~D.~S.~Stanislaus and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and Y.~Su and C.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and A.~Tamis and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and D.~Tlusty and T.~Todoroki and M.~V.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and O.~D.~Tsai and C.~Y.~Tsang and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and A.~N.~Vasiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and H.~Wieman and G.~Wilks and S.~W.~Wissink and J.~Wu and J.~Wu and X.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and Z.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and N.~Yu and Y.~Yu and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and X.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and C.~Zhou and J.~Zhou and S.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{B}eam {E}nergy {D}ependence of {T}riton {P}roduction and {Y}ield {R}atio ($\mathrm{{N}}_t \times \mathrm{{N}}_p/\mathrm{{N}}_d^2$) in {A}u+{A}u {C}ollisions at {RHIC}}, year = {2022}, eprint = {2209.08058}, howpublished = {Phys. Rev. Lett. 130, 202301 (2023)}, doi = {10.1103/PhysRevLett.130.202301}, note = {arXiv:2209.08058v2} }
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We report the triton ($t$) production in mid-rapidity ($|y| <$ 0.5) Au+Au collisions at $\sqrt{s_\mathrm{NN}}$= 7.7--200 GeV measured by the STAR experiment from the first phase of the beam energy scan at the Relativistic Heavy Ion Collider (RHIC). The nuclear compound yield ratio ($\mathrm{N}_t \times \mathrm{N}_p/\mathrm{N}_d^2$), which is predicted to be sensitive to the fluctuation of local neutron density, is observed to decrease monotonically with increasing charged-particle multiplicity ($dN_{ch}/d\eta$) and follows a scaling behavior. The $dN_{ch}/d\eta$ dependence of the yield ratio is compared to calculations from coalescence and thermal models. Enhancements in the yield ratios relative to the coalescence baseline are observed in the 0\%-10\% most central collisions at 19.6 and 27 GeV, with a significance of 2.3$\sigma$ and 3.4$\sigma$, respectively, giving a combined significance of 4.1$\sigma$. The enhancements are not observed in peripheral collisions or model calculations without critical fluctuation, and decreases with a smaller $p_{T}$ acceptance. The physics implications of these results on the QCD phase structure and the production mechanism of light nuclei in heavy-ion collisions are discussed.
Search for the Chiral Magnetic Effect in Au+Au collisions at $\sqrt{s_{_{\rm{NN}}}}=27$ GeV with the STAR forward Event Plane Detectors
STAR Collaboration, B. E. Aboona, J. Adam, L. Adamczyk, J. R. Adams, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, D. M. Anderson, E. C. Aschenauer, J. Atchison, V. Bairathi, W. Baker, J. G. Ball Cap, K. Barish, R. Bellwied, P. Bhagat, A. Bhasin, S. Bhatta, J. Bielcik, et al (352)
Sep 09 2022 nucl-ex hep-ph nucl-th arXiv:2209.03467v3

@misc{2209.03467, author = {STAR Collaboration and B.~E.~Aboona and J.~Adam and L.~Adamczyk and J.~R.~Adams and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and D.~M.~Anderson and E.~C.~Aschenauer and J.~Atchison and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and R.~Bellwied and P.~Bhagat and A.~Bhasin and S.~Bhatta and J.~Bielcik and J.~Bielcikova and J.~D.~Brandenburg and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and J.~Ceska and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and Z.~Chang and D.~Chen and J.~Chen and J.~H.~Chen and Z.~Chen and J.~Cheng and Y.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and G.~Dale-Gau and A.~Das and M.~Daugherity and I.~M.~Deppner and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and F.~A.~Flor and C.~Fu and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and W.~He and X.~H.~He and Y.~He and N.~Herrmann and L.~Holub and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and Y.~Huang and T.~J.~Humanic and D.~Isenhower and M.~Isshiki and W.~W.~Jacobs and A.~Jalotra and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and C.~Jin and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~K.~Kosarzewski and L.~Kramarik and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and R.~Lacey and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and Z.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and M.~A.~Lisa and C.~Liu and F.~Liu and H.~Liu and H.~Liu and L.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and O.~Lomicky and R.~S.~Longacre and E.~Loyd and T.~Lu and N.~S.~Lukow and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and G.~McNamara and K.~Mi and S.~Mioduszewski and B.~Mohanty and I.~Mooney and A.~Mukherjee and M.~I.~Nagy and A.~S.~Nain and J.~D.~Nam and Md.~Nasim and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and T.~Niida and R.~Nishitani and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and K.~Okubo and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and T.~Pani and A.~Paul and B.~Pawlik and D.~Pawlowska and C.~Perkins and J.~Pluta and B.~R.~Pokhrel and M.~Posik and T.~Protzman and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and Z.~Qin and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and C.~W.~Robertson and M.~Robotkova and M.~A.~Rosales Aguilar and D.~Roy and P.~Roy Chowdhury and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and S.~Sato and W.~B.~Schmidke and N.~Schmitz and F-J.~Seck and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and M.~Sharma and N.~Sharma and R.~Sharma and S.~R.~Sharma and A.~I.~Sheikh and D.~Y.~Shen and K.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and F.~Si and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and Y.~Song and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and B.~Stringfellow and Y.~Su and A.~A.~P.~Suaide and M.~Sumbera and C.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and Z.~W.~Sweger and P.~Szymanski and A.~Tamis and A.~H.~Tang and Z.~Tang and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and C.~Y.~Tsang and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and D.~Wielanek and H.~Wieman and G.~Wilks and S.~W.~Wissink and R.~Witt and J.~Wu and J.~Wu and X.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and Z.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and X.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and C.~Zhou and J.~Zhou and S.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{S}earch for the {C}hiral {M}agnetic {E}ffect in {A}u+{A}u collisions at $\sqrt{s_{_{\rm{{NN}}}}}=27$ {G}e{V} with the {STAR} forward {E}vent {P}lane {D}etectors}, year = {2022}, eprint = {2209.03467}, doi = {10.1016/j.physletb.2023.137779}, note = {arXiv:2209.03467v3} }
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A decisive experimental test of the Chiral Magnetic Effect (CME) is considered one of the major scientific goals at the Relativistic Heavy-Ion Collider (RHIC) towards understanding the nontrivial topological fluctuations of the Quantum Chromodynamics vacuum. In heavy-ion collisions, the CME is expected to result in a charge separation phenomenon across the reaction plane, whose strength could be strongly energy dependent. The previous CME searches have been focused on top RHIC energy collisions. In this Letter, we present a low energy search for the CME in Au+Au collisions at $\sqrt{s_{_{\rm{NN}}}}=27$ GeV. We measure elliptic flow scaled charge-dependent correlators relative to the event planes that are defined at both mid-rapidity $|\eta|<1.0$ and at forward rapidity $2.1 < |\eta|<5.1$. We compare the results based on the directed flow plane ($\Psi_1$) at forward rapidity and the elliptic flow plane ($\Psi_2$) at both central and forward rapidity. The CME scenario is expected to result in a larger correlation relative to $\Psi_1$ than to $\Psi_2$, while a flow driven background scenario would lead to a consistent result for both event planes. In 10-50\% centrality, results using three different event planes are found to be consistent within experimental uncertainties, suggesting a flow driven background scenario dominating the measurement. We obtain an upper limit on the deviation from a flow driven background scenario at the 95\% confidence level. This work opens up a possible road map towards future CME search with the high statistics data from the RHIC Beam Energy Scan Phase-II.
Pion, kaon, and (anti-)proton production in U+U Collisions at $\sqrt{s_{NN}}$ = 193 GeV measured with the STAR detector
STAR Collaboration, M. S. Abdallah, B. E. Aboona, J. Adam, J. R. Adams, J. K. Adkins, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, A. Aitbaev, I. Alekseev, D. M. Anderson, A. Aparin, J. Atchison, G. S. Averichev, V. Bairathi, W. Baker, J. G. Ball Cap, K. Barish, et al (335)
Aug 02 2022 nucl-ex hep-ex hep-ph nucl-th arXiv:2208.00653v2

@misc{2208.00653, author = {STAR Collaboration and M.~S.~Abdallah and B.~E.~Aboona and J.~Adam and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and A.~Aitbaev and I.~Alekseev and D.~M.~Anderson and A.~Aparin and J.~Atchison and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and P.~Bhagat and A.~Bhasin and S.~Bhatta and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and B.~K.~Chan and Z.~Chang and S.~Chattopadhyay and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and A.~Hamed and Y.~Han and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and E.~Hoffman and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and D.~Isenhower and M.~Isshiki and W.~W.~Jacobs and C.~Jena and Y.~Ji and J.~Jia and K.~Jiang and C.~Jin and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and B.~Kimelman and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~Kochenda and A.~A.~Korobitsin and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and Z.~Li and X.~Liang and Y.~Liang and T.~Lin and Y.~Lin and F.~Liu and H.~Liu and H.~Liu and T.~Liu and X.~Liu and Y.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and T.~Lu and N.~S.~Lukow and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~L.~Manukhov and S.~Margetis and H.~S.~Matis and J.~A.~Mazer and G.~McNamara and N.~G.~Minaev and D.~Mishra and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and M.~I.~Nagy and A.~S.~Nain and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and K.~Okubo and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and P.~Parfenov and A.~Paul and C.~Perkins and B.~R.~Pokhrel and J.~Porter and M.~Posik and N.~K.~Pruthi and J.~Putschke and Z.~Qin and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and H.~G.~Ritter and O.~V.~Rogachevsky and J.~L.~Romero and D.~Roy and P.~Roy Chowdhury and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and E.~Samigullin and S.~Sato and W.~B.~Schmidke and N.~Schmitz and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and R.~Sharma and A.~I.~Sheikh and D.~Y.~Shen and K.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and Y.~Söhngen and W.~Solyst and Y.~Song and B.~Srivastava and T.~D.~S.~Stanislaus and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and C.~Sun and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and O.~D.~Tsai and C.~Y.~Tsang and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and A.~N.~Vasiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and D.~Wielanek and H.~Wieman and S.~W.~Wissink and J.~Wu and J.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and Z.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and S.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and C.~Zhou and J.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{P}ion, kaon, and (anti-)proton production in {U}+{U} {C}ollisions at $\sqrt{s_{{NN}}}$ = 193 {G}e{V} measured with the {STAR} detector}, year = {2022}, eprint = {2208.00653}, howpublished = {Phys. Rev. C 107 (2023) 024901}, doi = {10.1103/PhysRevC.107.024901}, note = {arXiv:2208.00653v2} }
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We present the first measurements of transverse momentum spectra of $\pi^{\pm}$, $K^{\pm}$, $p(\bar{p})$ at midrapidity ($|y| < 0.1$) in U+U collisions at $\sqrt{s_{NN}}$ = 193 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC). The centrality dependence of particle yields, average transverse momenta, particle ratios and kinetic freeze-out parameters are discussed. The results are compared with the published results from Au+Au collisions at $\sqrt{s_{NN}} =$ 200 GeV in STAR. The results are also compared to those from A Multi Phase Transport (AMPT) model.
Measurement of sequential $\Upsilon$ suppression in Au+Au collisions at $\sqrt{s_{_\mathrm{NN}}}$ = 200 GeV with the STAR experiment
STAR Collaboration, B. E. Aboona, J. Adam, L. Adamczyk, J. R. Adams, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, D. M. Anderson, E. C. Aschenauer, J. Atchison, V. Bairathi, W. Baker, J. G. Ball Cap, K. Barish, R. Bellwied, P. Bhagat, A. Bhasin, S. Bhatta, J. Bielcik, et al (354)
Jul 15 2022 nucl-ex nucl-th arXiv:2207.06568v2

@misc{2207.06568, author = {STAR Collaboration and B.~E.~Aboona and J.~Adam and L.~Adamczyk and J.~R.~Adams and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and D.~M.~Anderson and E.~C.~Aschenauer and J.~Atchison and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and R.~Bellwied and P.~Bhagat and A.~Bhasin and S.~Bhatta and J.~Bielcik and J.~Bielcikova and J.~D.~Brandenburg and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and J.~Ceska and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and Z.~Chang and D.~Chen and J.~Chen and J.~H.~Chen and Z.~Chen and J.~Cheng and Y.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and G.~Dale-Gau and A.~Das and M.~Daugherity and I.~M.~Deppner and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and F.~A.~Flor and C.~Fu and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and N.~Herrmann and L.~Holub and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and Y.~Huang and T.~J.~Humanic and D.~Isenhower and M.~Isshiki and W.~W.~Jacobs and A.~Jalotra and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and C.~Jin and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~K.~Kosarzewski and L.~Kramarik and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and R.~Lacey and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and Z.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and M.~A.~Lisa and C.~Liu and F.~Liu and H.~Liu and H.~Liu and L.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and O.~Lomicky and R.~S.~Longacre and E.~Loyd and T.~Lu and N.~S.~Lukow and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and G.~McNamara and K.~Mi and S.~Mioduszewski and B.~Mohanty and I.~Mooney and A.~Mukherjee and M.~I.~Nagy and A.~S.~Nain and J.~D.~Nam and Md.~Nasim and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and T.~Niida and R.~Nishitani and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and K.~Okubo and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and T.~Pani and A.~Paul and B.~Pawlik and D.~Pawlowska and C.~Perkins and J.~Pluta and B.~R.~Pokhrel and M.~Posik and T.~Protzman and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and Z.~Qin and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and C.~W.~Robertson and M.~Robotkova and J.~L.~Romero and M.~A.~Rosales Aguilar and D.~Roy and P.~Roy Chowdhury and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and S.~Sato and W.~B.~Schmidke and N.~Schmitz and F-J.~Seck and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and M.~Sharma and N.~Sharma and R.~Sharma and S.~R.~Sharma and A.~I.~Sheikh and D.~Y.~Shen and K.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and F.~Si and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and Y.~Song and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and B.~Stringfellow and Y.~Su and A.~A.~P.~Suaide and M.~Sumbera and C.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and Z.~W.~Sweger and P.~Szymanski and A.~Tamis and A.~H.~Tang and Z.~Tang and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and C.~Y.~Tsang and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and D.~Wielanek and H.~Wieman and G.~Wilks and S.~W.~Wissink and R.~Witt and J.~Wu and J.~Wu and X.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and Z.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and X.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and C.~Zhou and J.~Zhou and S.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{M}easurement of sequential $\{U}psilon$ suppression in {A}u+{A}u collisions at $\sqrt{s_{_\mathrm{{NN}}}}$ = 200 {G}e{V} with the {STAR} experiment}, year = {2022}, eprint = {2207.06568}, howpublished = {Phys. Rev. Lett. 130 (2023) 112301}, doi = {10.1103/PhysRevLett.130.112301}, note = {arXiv:2207.06568v2} }
PDF
We report on measurements of sequential $\Upsilon$ suppression in Au+Au collisions at $\sqrt{s_{_\mathrm{NN}}}$ = 200 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC) through both the dielectron and dimuon decay channels. In the 0-60% centrality class, the nuclear modification factors ($R_{\mathrm{AA}}$), which quantify the level of yield suppression in heavy-ion collisions compared to $p$+$p$ collisions, for $\Upsilon$(1S) and $\Upsilon$(2S) are $0.40 \pm 0.03~\textrm{(stat.)} \pm 0.03~\textrm{(sys.)} \pm 0.09~\textrm{(norm.)}$ and $0.26 \pm 0.08~\textrm{(stat.)} \pm 0.02~\textrm{(sys.)} \pm 0.06~\textrm{(norm.)}$, respectively, while the upper limit of the $\Upsilon$(3S) $R_{\mathrm{AA}}$ is 0.17 at a 95% confidence level. This provides experimental evidence that the $\Upsilon$(3S) is significantly more suppressed than the $\Upsilon$(1S) at RHIC. The level of suppression for $\Upsilon$(1S) is comparable to that observed at the much higher collision energy at the Large Hadron Collider. These results point to the creation of a medium at RHIC whose temperature is sufficiently high to strongly suppress excited $\Upsilon$ states.
Tomography of Ultra-relativistic Nuclei with Polarized Photon-gluon Collisions
STAR Collaboration, M. S. Abdallah, B. E. Aboona, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, A. Aitbaev, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, G. S. Averichev, V. Bairathi, et al (375)
Apr 05 2022 nucl-ex nucl-th quant-ph arXiv:2204.01625v1

@misc{2204.01625, author = {STAR Collaboration and M.~S.~Abdallah and B.~E.~Aboona and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and A.~Aitbaev and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and A.~Behera and R.~Bellwied and P.~Bhagat and A.~Bhasin and J.~Bielcik and J.~Bielcikova and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and A.~Chatterjee and S.~Chattopadhyay and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and D.~Isenhower and M.~Isshiki and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and K.~Jiang and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and D.~P.~Kikoła and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and S.~R.~Klein and A.~G.~Knospe and H.~S.~Ko and L.~Kochenda and A.~Korobitsin and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and Y.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and H.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and T.~Lu and N.~S.~Lukow and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~L.~Manukhov and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mukherjee and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and K.~Okubo and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and P.~Parfenov and A.~Paul and B.~Pawlik and D.~Pawlowska and C.~Perkins and J.~Pluta and B.~R.~Pokhrel and J.~Porter and M.~Posik and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and M.~Robotkova and J.~L.~Romero and D.~Roy and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and E.~Samigullin and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and R.~Sharma and A.~I.~Sheikh and D.~Y.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and W.~Solyst and Y.~Song and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and J.~Wu and J.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and S.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and C.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{T}omography of {U}ltra-relativistic {N}uclei with {P}olarized {P}hoton-gluon {C}ollisions}, year = {2022}, eprint = {2204.01625}, note = {arXiv:2204.01625v1} }
PDF
A linearly polarized photon can be quantized from the Lorentz-boosted electromagnetic field of a nucleus traveling at ultra-relativistic speed. When two relativistic heavy nuclei pass one another at a distance of a few nuclear radii, the photon from one nucleus may interact through a virtual quark-antiquark pair with gluons from the other nucleus forming a short-lived vector meson (e.g. ${\rho^0}$). In this experiment, the polarization was utilized in diffractive photoproduction to observe a unique spin interference pattern in the angular distribution of ${\rho^0\rightarrow\pi^+\pi^-}$ decays. The observed interference is a result of an overlap of two wave functions at a distance an order of magnitude larger than the ${\rho^0}$ travel distance within its lifetime. The strong-interaction nuclear radii were extracted from these diffractive interactions, and found to be $6.53\pm 0.06$ fm ($^{197} {\rm Au }$) and $7.29\pm 0.08$ fm ($^{238} {\rm U}$), larger than the nuclear charge radii. The observable is demonstrated to be sensitive to the nuclear geometry and quantum interference of non-identical particles.
Evidence for Nonlinear Gluon Effects in QCD and their $A$ Dependence at STAR
STAR Collaboration, M. S. Abdallah, B. E. Aboona, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, A. Aitbaev, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, G. S. Averichev, V. Bairathi, et al (377)
Nov 23 2021 nucl-ex hep-ex hep-th nucl-th arXiv:2111.10396v2

@misc{2111.10396, author = {STAR Collaboration and M.~S.~Abdallah and B.~E.~Aboona and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and A.~Aitbaev and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and A.~Behera and R.~Bellwied and P.~Bhagat and A.~Bhasin and J.~Bielcik and J.~Bielcikova and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and A.~Chatterjee and S.~Chattopadhyay and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and C.~J.~Feng and Y.~Feng and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and C.~Hu and Q.~Hu and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and D.~Isenhower and M.~Isshiki and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and K.~Jiang and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~Kochenda and A.~Korobitsin and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and H.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and T.~Lu and N.~S.~Lukow and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~L.~Manukhov and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mukherjee and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and K.~Okubo and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and P.~Parfenov and A.~Paul and B.~Pawlik and D.~Pawlowska and C.~Perkins and J.~Pluta and B.~R.~Pokhrel and J.~Porter and M.~Posik and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and M.~Robotkova and O.~V.~Rogachevskiy and J.~L.~Romero and D.~Roy and L.~Ruan and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and E.~Samigullin and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and R.~Sharma and A.~I.~Sheikh and D.~Y.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and J.~Singh and S.~Singha and P.~Sinha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and W.~Solyst and Y.~Song and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and J.~Wu and J.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and S.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and F.~Zhao and J.~Zhao and M.~Zhao and C.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{E}vidence for {N}onlinear {G}luon {E}ffects in {QCD} and their ${A}$ {D}ependence at {STAR}}, year = {2021}, eprint = {2111.10396}, doi = {10.1103/PhysRevLett.129.092501}, note = {arXiv:2111.10396v2} }
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The STAR Collaboration reports measurements of back-to-back azimuthal correlations of di-$\pi^0$s produced at forward pseudorapidities ($2.6<\eta<4.0$) in $p$+$p$, $p+$Al, and $p+$Au collisions at a center-of-mass energy of 200 GeV. We observe a clear suppression of the correlated yields of back-to-back $\pi^0$ pairs in $p+$Al and $p+$Au collisions compared to the $p$+$p$ data. The observed suppression of back-to-back pairs as a function of transverse momentum suggests nonlinear gluon dynamics arising at high parton densities. The larger suppression found in $p+$Au relative to $p+$Al collisions exhibits a dependence of the saturation scale, $Q_s^2$, on the mass number, $A$. A linear scaling of the suppression with $A^{1/3}$ is observed with a slope of $-0.09$ $\pm$ $0.01$.
Probing the gluonic structure of the deuteron with $J/\psi$ photoproduction in d+Au ultra-peripheral collisions
STAR Collaboration, M. S. Abdallah, B. E. Aboona, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, et al (383)
Sep 17 2021 nucl-ex hep-ex nucl-th arXiv:2109.07625v2

@misc{2109.07625, author = {STAR Collaboration and M.~S.~Abdallah and B.~E.~Aboona and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and A.~Behera and R.~Bellwied and P.~Bhagat and A.~Bhasin and J.~Bielcik and J.~Bielcikova and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and I.~Bunzarov and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and M.~Chevalier and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and N.~Elsey and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and P.~Federic and J.~Fedorisin and C.~J.~Feng and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and G.~Igo and D.~Isenhower and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and K.~Jiang and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and N.~Lewis and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and H.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and N.~S.~Lukow and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mukherjee and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and P.~Parfenov and B.~Pawlik and D.~Pawlowska and C.~Perkins and L.~Pinsky and J.~Pluta and B.~R.~Pokhrel and G.~Ponimatkin and J.~Porter and M.~Posik and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and M.~Robotkova and O.~V.~Rogachevskiy and J.~L.~Romero and D.~Roy and L.~Ruan and J.~Rusnak and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and A.~I.~Sheikh and D.~Y.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and W.~Solyst and Y.~Song and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and X.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and J.~Wu and J.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and G.~Yan and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhou and Y.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{P}robing the gluonic structure of the deuteron with ${J}/\psi$ photoproduction in d+{A}u ultra-peripheral collisions}, year = {2021}, eprint = {2109.07625}, doi = {10.1103/PhysRevLett.128.122303}, note = {arXiv:2109.07625v2} }
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Understanding gluon density distributions and how they are modified in nuclei are among the most important goals in nuclear physics. In recent years, diffractive vector meson production measured in ultra-peripheral collisions (UPCs) at heavy-ion colliders has provided a new tool for probing the gluon density. In this Letter, we report the first measurement of $J/\psi$ photoproduction off the deuteron in UPCs at the center-of-mass energy $\sqrt{s_{_{\rm NN}}}=200~\rm GeV$ in d$+$Au collisions. The differential cross section as a function of momentum transfer $-t$ is measured. In addition, data with a neutron tagged in the deuteron-going Zero-Degree Calorimeter is investigated for the first time, which is found to be consistent with the expectation of incoherent diffractive scattering at low momentum transfer. Theoretical predictions based on the Color Glass Condensate saturation model and the gluon shadowing model are compared with the data quantitatively. A better agreement with the saturation model has been observed. With the current measurement, the results are found to be directly sensitive to the gluon density distribution of the deuteron and the deuteron breakup, which provides insights into the nuclear gluonic structure.
Search for the Chiral Magnetic Effect with Isobar Collisions at $\sqrt{s_{NN}}$ = 200 GeV by the STAR Collaboration at RHIC
STAR Collaboration, M. S. Abdallah, B. E. Aboona, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, et al (378)
Sep 02 2021 nucl-ex hep-ex hep-ph nucl-th arXiv:2109.00131v1

@misc{2109.00131, author = {STAR Collaboration and M.~S.~Abdallah and B.~E.~Aboona and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and A.~Behera and R.~Bellwied and P.~Bhagat and A.~Bhasin and J.~Bielcik and J.~Bielcikova and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and I.~Bunzarov and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and M.~Chevalier and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and P.~Dixit and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and N.~Elsey and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and P.~Federic and J.~Fedorisin and C.~J.~Feng and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and G.~Igo and D.~Isenhower and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and K.~Jiang and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and H.~S.~Ko and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and H.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and N.~S.~Lukow and X.~F.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mukherjee and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and J.~Pan and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and P.~Parfenov and B.~Pawlik and D.~Pawlowska and C.~Perkins and L.~Pinsky and R.~L.~Pintér and J.~Pluta and B.~R.~Pokhrel and G.~Ponimatkin and J.~Porter and M.~Posik and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and M.~Robotkova and O.~V.~Rogachevskiy and J.~L.~Romero and D.~Roy and L.~Ruan and J.~Rusnak and A.~K.~Sahoo and N.~R.~Sahoo and H.~Sako and S.~Salur and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and A.~I.~Sheikh and D.~Y.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and J.~Wu and J.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhou and X.~Zhu and M.~Zurek and M.~Zyzak}, title = {{S}earch for the {C}hiral {M}agnetic {E}ffect with {I}sobar {C}ollisions at $\sqrt{s_{{NN}}}$ = 200 {G}e{V} by the {STAR} {C}ollaboration at {RHIC}}, year = {2021}, eprint = {2109.00131}, note = {arXiv:2109.00131v1} }
PDF
The chiral magnetic effect (CME) is predicted to occur as a consequence of a local violation of $\cal P$ and $\cal CP$ symmetries of the strong interaction amidst a strong electro-magnetic field generated in relativistic heavy-ion collisions. Experimental manifestation of the CME involves a separation of positively and negatively charged hadrons along the direction of the magnetic field. Previous measurements of the CME-sensitive charge-separation observables remain inconclusive because of large background contributions. In order to better control the influence of signal and backgrounds, the STAR Collaboration performed a blind analysis of a large data sample of approximately 3.8 billion isobar collisions of $^{96}_{44}$Ru+$^{96}_{44}$Ru and $^{96}_{40}$Zr+$^{96}_{40}$Zr at $\sqrt{s_{\rm NN}}=200$ GeV. Prior to the blind analysis, the CME signatures are predefined as a significant excess of the CME-sensitive observables in Ru+Ru collisions over those in Zr+Zr collisions, owing to a larger magnetic field in the former. A precision down to 0.4% is achieved, as anticipated, in the relative magnitudes of the pertinent observables between the two isobar systems. Observed differences in the multiplicity and flow harmonics at the matching centrality indicate that the magnitude of the CME background is different between the two species. No CME signature that satisfies the predefined criteria has been observed in isobar collisions in this blind analysis.
Phenomenological study on correlation between flow harmonics and mean transverse momentum in nuclear collisions
Chunjian Zhang, Jiangyong Jia, Shengli Huang
Aug 27 2021 nucl-th hep-ex hep-ph arXiv:2108.11452v4

@misc{2108.11452, author = {Chunjian Zhang and Jiangyong Jia and Shengli Huang}, title = {{P}henomenological study on correlation between flow harmonics and mean transverse momentum in nuclear collisions}, year = {2021}, eprint = {2108.11452}, note = {arXiv:2108.11452v4} }
PDF
To assess the properties of the quark-gluon plasma formed in nuclear collisions, the Pearson correlation coefficient between flow harmonics and mean transverse momentum, $\rho\left(v_{n}^{2},\left[p_{\mathrm{T}}\right]\right)$, reflecting the overlapped geometry of colliding atomic nuclei, is measured. $\rho\left(v_{2}^{2},\left[p_{\mathrm{T}}\right]\right)$ was found to be particularly sensitive to the quadrupole deformation of the nuclei. We study the influence of the nuclear quadrupole deformation on $\rho\left(v_{n}^{2},\left[p_{\mathrm{T}}\right]\right)$ in $\rm{Au+Au}$ and $\rm{U+U}$ collisions at RHIC energy using $\rm{AMPT}$ transport model, and show that the $\rho\left(v_{2}^{2},\left[p_{\mathrm{T}}\right]\right)$ is reduced by the prolate deformation $\beta_2$ and turns to change sign in ultra-central collisions (UCC).
Search for the chiral magnetic effect via charge-dependent azimuthal correlations relative to spectator and participant planes in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
STAR Collaboration, M. S. Abdallah, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, W. Baker, et al (370)
Jun 18 2021 nucl-ex hep-ex hep-ph nucl-th arXiv:2106.09243v2

@misc{2106.09243, author = {STAR Collaboration and M.~S.~Abdallah and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and A.~Behera and R.~Bellwied and P.~Bhagat and A.~Bhasin and J.~Bielcik and J.~Bielcikova and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and I.~Bunzarov and J.~Butterworth and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and M.~Chevalier and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and N.~Elsey and J.~Engelage and G.~Eppley and S.~Esumi and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and P.~Federic and J.~Fedorisin and C.~J.~Feng and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and G.~Igo and D.~Isenhower and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and K.~Jiang and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and H.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and N.~S.~Lukow and X.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mukherjee and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and P.~Parfenov and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and L.~Pinsky and R.~L.~Pintér and J.~Pluta and B.~R.~Pokhrel and G.~Ponimatkin and J.~Porter and M.~Posik and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and M.~Robotkova and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and N.~R.~Sahoo and H.~Sako and S.~Salur and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and A.~I.~Sheikh and D.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and J.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{S}earch for the chiral magnetic effect via charge-dependent azimuthal correlations relative to spectator and participant planes in {A}u+{A}u collisions at $\sqrt{s_{{NN}}}$ = 200 {G}e{V}}, year = {2021}, eprint = {2106.09243}, howpublished = {Phys. Rev. Lett. 128, 092301 (2022)}, doi = {10.1103/PhysRevLett.128.092301}, note = {arXiv:2106.09243v2} }
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The chiral magnetic effect (CME) refers to charge separation along a strong magnetic field due to imbalanced chirality of quarks in local parity and charge-parity violating domains in quantum chromodynamics. The experimental measurement of the charge separation is made difficult by the presence of a major background from elliptic azimuthal anisotropy. This background and the CME signal have different sensitivities to the spectator and participant planes, and could thus be determined by measurements with respect to these planes. We report such measurements in Au+Au collisions at a nucleon-nucleon center-of-mass energy of 200 GeV at the Relativistic Heavy-Ion Collider. It is found that the charge separation, with the flow background removed, is consistent with zero in peripheral (large impact parameter) collisions. Some indication of finite CME signals is seen in mid-central (intermediate impact parameter) collisions. Significant residual background effects may, however, still be present.
Measurement of the Sixth-Order Cumulant of Net-Proton Multiplicity Distributions in Au+Au Collisions at $\sqrt{s_{\rm NN}}=$ 27, 54.4, and 200 GeV at RHIC
STAR Collaboration, M. S. Abdallah, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, W. Baker, et al (374)
Jun 01 2021 nucl-ex hep-ex hep-ph nucl-th arXiv:2105.14698v2

@misc{2105.14698, author = {STAR Collaboration and M.~S.~Abdallah and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and A.~Behera and R.~Bellwied and P.~Bhagat and A.~Bhasin and J.~Bielcik and J.~Bielcikova and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and I.~Bunzarov and J.~Butterworth and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and M.~Chevalier and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and X.~Dong and J.~L.~Drachenberg and E.~Duckworth and J.~C.~Dunlop and N.~Elsey and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and P.~Federic and J.~Fedorisin and C.~J.~Feng and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and G.~Igo and D.~Isenhower and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and K.~Jiang and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and H.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and N.~S.~Lukow and X.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mukherjee and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and P.~Parfenov and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and L.~Pinsky and R.~L.~Pintér and J.~Pluta and B.~R.~Pokhrel and G.~Ponimatkin and J.~Porter and M.~Posik and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and M.~Robotkova and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and N.~R.~Sahoo and H.~Sako and S.~Salur and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and A.~I.~Sheikh and D.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and J.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and J.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{M}easurement of the {S}ixth-{O}rder {C}umulant of {N}et-{P}roton {M}ultiplicity {D}istributions in {A}u+{A}u {C}ollisions at $\sqrt{s_{\rm {NN}}}=$ 27, 54.4, and 200 {G}e{V} at {RHIC}}, year = {2021}, eprint = {2105.14698}, note = {arXiv:2105.14698v2} }
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According to first principle Lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region $\mu_{\rm B}\leq T_{c}$. In this range the ratio, $C_{6}/C_{2}$, of net-baryon distributions are predicted to be negative. In this paper, we report the first measurement of the midrapidity net-proton $C_{6}/C_{2}$ from 27, 54.4 and 200 GeV Au+Au collisions at RHIC. The dependence on collision centrality and kinematic acceptance in ($p_{T}$, $y$) are analyzed. While for 27 and 54.4 GeV collisions the $C_{6}/C_{2}$ values are close to zero within uncertainties, it is observed that for 200 GeV collisions, the $C_{6}/C_{2}$ ratio becomes progressively negative from peripheral to central collisions. Transport model calculations without critical dynamics predict mostly positive values except for the most central collisions within uncertainties. These observations seem to favor a smooth crossover in the high energy nuclear collisions at top RHIC energy.
Probing nuclear quadrupole deformation from correlation of elliptic flow and transverse momentum in heavy ion collisions
Jiangyong Jia, Shengli Huang, Chunjian Zhang
May 13 2021 nucl-th hep-ph nucl-ex physics.atom-ph arXiv:2105.05713v3

@misc{2105.05713, author = {Jiangyong Jia and Shengli Huang and Chunjian Zhang}, title = {{P}robing nuclear quadrupole deformation from correlation of elliptic flow and transverse momentum in heavy ion collisions}, year = {2021}, eprint = {2105.05713}, note = {arXiv:2105.05713v3} }
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In heavy ion collisions, elliptic flow $v_2$ and radial flow, characterized by event-wise average transverse momentum $[p_{\mathrm{T}}]$, are related to the shape and size of the overlap region, which are sensitive to the shape of colliding atomic nuclei. The Pearson correlation coefficient between $v_2$ and $[p_{\mathrm{T}}]$, $\rho_2$, was found to be particularly sensitive to the quadrupole deformation parameter $\beta$ that is traditionally measured in low energy experiments. Built on earlier insight that the prolate deformation $\beta>0$ reduces the $\rho_2$ in ultra-central collisions (UCC), we show that the prolate deformation $\beta<0$ enhances the value of $\rho_2$. As $\beta>0$ and $\beta<0$ are the two extremes of triaxiality, the strength and sign of $v_2^2-[p_{\mathrm{T}}]$ correlation can be used to provide valuable information on the triaxiality of the nucleus. Our study provide further arguments for using the hydrodynamic flow as a precision tool to directly image the deformation of the atomic nuclei at extremely short time scale ($<10^{-24}$s).
Cumulants and Correlation Functions of Net-proton, Proton and Antiproton Multiplicity Distributions in Au+Au Collisions at energies available at the BNL Relativistic Heavy Ion Collider
STAR Collaboration, M. S. Abdallah, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, I. Aggarwal, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, W. Baker, et al (372)
Feb 01 2021 nucl-ex hep-ex hep-ph nucl-th arXiv:2101.12413v2

@misc{2101.12413, author = {STAR Collaboration and M.~S.~Abdallah and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and I.~Aggarwal and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and W.~Baker and J.~G.~Ball Cap and K.~Barish and A.~Behera and R.~Bellwied and P.~Bhagat and A.~Bhasin and J.~Bielcik and J.~Bielcikova and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and I.~Bunzarov and J.~Butterworth and X.~Z.~Cai and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F.-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and D.~Chen and J.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and M.~Chevalier and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and A.~Dhamija and L.~Di Carlo and L.~Didenko and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and N.~Elsey and J.~Engelage and G.~Eppley and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and F.~M.~Fawzi and S.~Fazio and P.~Federic and J.~Fedorisin and C.~J.~Feng and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and A.~Francisco and C.~Fu and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and N.~Ghimire and A.~Gibson and K.~Gopal and X.~Gou and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and Y.~Han and S.~Harabasz and M.~D.~Harasty and J.~W.~Harris and H.~Harrison and S.~He and W.~He and X.~H.~He and Y.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and Y.~Hu and H.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and Y.~Huang and T.~J.~Humanic and D.~Isenhower and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~Ji and J.~Jia and K.~Jiang and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and B.~Kimelman and D.~Kincses and I.~Kisel and A.~Kiselev and A.~G.~Knospe and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and L.~Kumar and S.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and C.~Li and C.~Li and W.~Li and X.~Li and Y.~Li and X.~Liang and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and E.~Loyd and N.~S.~Lukow and X.~Luo and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and D.~A.~Morozov and A.~Mukherjee and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and R.~Nishitani and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and A.~Pandav and A.~K.~Pandey and Y.~Panebratsev and P.~Parfenov and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and L.~Pinsky and R.~L.~Pintér and J.~Pluta and B.~R.~Pokhrel and G.~Ponimatkin and J.~Porter and M.~Posik and V.~Prozorova and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and C.~Racz and S.~K.~Radhakrishnan and N.~Raha and R.~L.~Ray and R.~Reed and H.~G.~Ritter and M.~Robotkova and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and N.~R.~Sahoo and H.~Sako and S.~Salur and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and T.~Shao and A.~I.~Sheikh and D.~Shen and S.~S.~Shi and Y.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and M.~J.~Skoby and N.~Smirnov and Y.~Söhngen and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and Z.~W.~Sweger and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and T.~Truhlar and B.~A.~Trzeciak and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and V.~Verkest and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and J.~Wu and Y.~Wu and B.~Xi and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and Y.~Yu and H.~Zbroszczyk and W.~Zha and C.~Zhang and D.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{C}umulants and {C}orrelation {F}unctions of {N}et-proton, {P}roton and {A}ntiproton {M}ultiplicity {D}istributions in {A}u+{A}u {C}ollisions at energies available at the {BNL} {R}elativistic {H}eavy {I}on {C}ollider}, year = {2021}, eprint = {2101.12413}, howpublished = {Physical Review C 104, 024902 (2021)}, doi = {10.1103/PhysRevC.104.024902}, note = {arXiv:2101.12413v2} }
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We report a systematic measurement of cumulants, $C_{n}$, for net-proton, proton and antiproton multiplicity distributions, and correlation functions, $\kappa_n$, for proton and antiproton multiplicity distributions up to the fourth order in Au+Au collisions at $\sqrt{s_{\mathrm {NN}}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, 54.4, 62.4 and 200 GeV. The $C_{n}$ and $\kappa_n$ are presented as a function of collision energy, centrality and kinematic acceptance in rapidity, $y$, and transverse momentum, $p_{T}$. The data were taken during the first phase of the Beam Energy Scan (BES) program (2010 -- 2017) at the BNL Relativistic Heavy Ion Collider (RHIC) facility. The measurements are carried out at midrapidity ($|y| <$ 0.5) and transverse momentum 0.4 $<$ $p_{\rm T}$ $<$ 2.0 GeV/$c$, using the STAR detector at RHIC. We observe a non-monotonic energy dependence ($\sqrt{s_{\mathrm {NN}}}$ = 7.7 -- 62.4 GeV) of the net-proton $C_{4}$/$C_{2}$ with the significance of 3.1$\sigma$ for the 0-5\% central Au+Au collisions. This is consistent with the expectations of critical fluctuations in a QCD-inspired model. Thermal and transport model calculations show a monotonic variation with $\sqrt{s_{\mathrm {NN}}}$. For the multiparticle correlation functions, we observe significant negative values for a two-particle correlation function, $\kappa_2$, of protons and antiprotons, which are mainly due to the effects of baryon number conservation. Furthermore, it is found that the four-particle correlation function, $\kappa_4$, of protons plays a role in determining the energy dependence of proton $C_4/C_1$ below 19.6 GeV, which cannot be understood by the effect of baryon number conservation.
Pair invariant mass to isolate background in the search for the chiral magnetic effect in Au+Au collisions at $\sqrt{s_{_{\rm NN}}}$= 200 GeV
STAR Collaboration, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, K. Barish, A. Behera, R. Bellwied, et al (345)
Jun 11 2020 nucl-ex hep-ex nucl-th arXiv:2006.05035v2

@misc{2006.05035, author = {STAR Collaboration and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and K.~Barish and A.~Behera and R.~Bellwied and A.~Bhasin and J.~Bielcik and J.~Bielcikova and L.~C.~Bland and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and J.~Butterworth and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and D.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and M.~Cherney and M.~Chevalier and S.~Choudhury and W.~Christie and X.~Chu and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and L.~Didenko and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and T.~Edmonds and N.~Elsey and J.~Engelage and G.~Eppley and R.~Esha and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and P.~Federic and J.~Fedorisin and C.~J.~Feng and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and A.~Francisco and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and A.~Gibson and K.~Gopal and D.~Grosnick and W.~Guryn and A.~I.~Hamad and A.~Hamed and S.~Harabasz and J.~W.~Harris and S.~He and W.~He and X.~H.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and Y.~Hong and S.~Horvat and Y.~Hu and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and T.~J.~Humanic and P.~Huo and G.~Igo and D.~Isenhower and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~JI and J.~Jia and K.~Jiang and S.~Jowzaee and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and B.~Kimelman and D.~Kincses and T.~A.~Kinghorn and I.~Kisel and A.~Kiselev and A.~Kisiel and M.~Kocan and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and K.~Krueger and N.~Kulathunga Mudiyanselage and L.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and P.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and N.~S.~Lukow and S.~Luo and X.~Luo and G.~L.~Ma and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and M.~M.~Mondal and I.~Mooney and Z.~Moravcova and D.~A.~Morozov and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and A.~S.~Nunes and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and A.~Pandav and Y.~Panebratsev and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and L.~Pinsky and R.~L.~Pintér and J.~Pluta and J.~Porter and M.~Posik and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and S.~K.~Radhakrishnan and S.~Ramachandran and R.~L.~Ray and R.~Reed and H.~G.~Ritter and J.~B.~Roberts and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and N.~R.~Sahoo and H.~Sako and S.~Salur and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and F.~Shen and W.~Q.~Shen and S.~S.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and N.~Smirnov and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and X.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and Y.~Wu and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~F.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and H.~Zbroszczyk and W.~Zha and D.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhong and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{P}air invariant mass to isolate background in the search for the chiral magnetic effect in {A}u+{A}u collisions at $\sqrt{s_{_{\rm {NN}}}}$= 200 {G}e{V}}, year = {2020}, eprint = {2006.05035}, howpublished = {Phys. Rev. C 106, 034908 (2022)}, doi = {10.1103/PhysRevC.106.034908}, note = {arXiv:2006.05035v2} }
PDF
Quark interactions with topological gluon configurations can induce local chirality imbalance and parity violation in quantum chromodynamics, which can lead to the chiral magnetic effect (CME) -- an electric charge separation along the strong magnetic field in relativistic heavy-ion collisions. The CME-sensitive azimuthal correlator observable ($\Delta\gamma$) is contaminated by background arising, in part, from resonance decays coupled with elliptic anisotropy ($v_{2}$). We report here differential measurements of the correlator as a function of the pair invariant mass ($m_{\rm inv}$) in 20-50\% centrality Au+Au collisions at $\sqrt{s_{_{\rm NN}}}$= 200 GeV by the STAR experiment at RHIC. Strong resonance background contributions to $\Delta\gamma$ are observed. At large $m_{\rm inv}$ where this background is significantly reduced, the $\Delta\gamma$ value is found to be significantly smaller. An event-shape-engineering technique is deployed to determine the $v_{2}$ background shape as a function of $m_{\rm inv}$. We extract a $v_2$-independent and $m_{\rm inv}$-averaged signal $\Delta\gamma_{\rm sig}$ = (0.03 $\pm$ 0.06 $\pm$ 0.08) $\times10^{-4}$, or $(2\pm4\pm5)\%$ of the inclusive $\Delta\gamma(m_{\rm inv}>0.4$ GeV/$c^2$)$ =(1.58 \pm 0.02 \pm 0.02) \times10^{-4}$, within pion $p_{T}$ = 0.2 - 0.8~\gevc and averaged over pseudorapidity ranges of $-1 < \eta < -0.05$ and $0.05 < \eta < 1$. This represents an upper limit of $0.23\times10^{-4}$, or $15\%$ of the inclusive result, at $95\%$ confidence level for the $m_{\rm inv}$-integrated CME contribution.
Beam energy dependence of net-$\Lambda$ fluctuations measured by the STAR experiment at RHIC
STAR Collaboration, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, K. Barish, A. Behera, R. Bellwied, et al (339)
Jan 20 2020 nucl-ex hep-ex hep-ph nucl-th arXiv:2001.06419v1

@misc{2001.06419, author = {STAR Collaboration and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and K.~Barish and A.~Behera and R.~Bellwied and A.~Bhasin and J.~Bielcik and J.~Bielcikova and L.~C.~Bland and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and J.~Butterworth and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and D.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and M.~Cherney and M.~Chevalier and S.~Choudhury and W.~Christie and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and L.~Didenko and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and T.~Edmonds and N.~Elsey and J.~Engelage and G.~Eppley and R.~Esha and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and P.~Federic and J.~Fedorisin and C.~J.~Feng and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and A.~Francisco and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and A.~Gibson and K.~Gopal and D.~Grosnick and W.~Guryn and A.~I.~Hamad and A.~Hamed and J.~W.~Harris and S.~He and W.~He and X.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and Y.~Hong and S.~Horvat and Y.~Hu and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and T.~J.~Humanic and P.~Huo and G.~Igo and D.~Isenhower and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~JI and J.~Jia and K.~Jiang and S.~Jowzaee and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and B.~Kimelman and D.~Kincses and T.~A.~Kinghorn and I.~Kisel and A.~Kiselev and A.~Kisiel and M.~Kocan and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and K.~Krueger and N.~Kulathunga Mudiyanselage and L.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and P.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and N.~S.~Lukow and S.~Luo and X.~Luo and G.~L.~Ma and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and I.~Mooney and Z.~Moravcova and D.~A.~Morozov and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and A.~Pandav and Y.~Panebratsev and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and L.~Pinsky and R.~L.~Pintér and J.~Pluta and J.~Porter and M.~Posik and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and S.~K.~Radhakrishnan and S.~Ramachandran and R.~L.~Ray and R.~Reed and H.~G.~Ritter and J.~B.~Roberts and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and N.~R.~Sahoo and H.~Sako and S.~Salur and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and F.~Shen and W.~Q.~Shen and S.~S.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and N.~Smirnov and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and Y.~Wu and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~F.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and H.~Zbroszczyk and W.~Zha and D.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhong and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{B}eam energy dependence of net-$\{L}ambda$ fluctuations measured by the {STAR} experiment at {RHIC}}, year = {2020}, eprint = {2001.06419}, note = {arXiv:2001.06419v1} }
PDF
The measurements of particle multiplicity distributions have generated considerable interest in understanding the fluctuations of conserved quantum numbers in the Quantum Chromodynamics (QCD) hadronization regime, in particular near a possible critical point and near the chemical freeze-out. We report the measurement of efficiency and centrality bin width corrected cumulant ratios ($C_{2}/C_{1}$, $C_{3}/C_{2}$) of net-$\Lambda$ distributions, in the context of both strangeness and baryon number conservation, as a function of collision energy, centrality and rapidity. The results are for Au + Au collisions at five beam energies ($\sqrt{s_{NN}}$ = 19.6, 27, 39, 62.4 and 200 GeV) recorded with the Solenoidal Tracker at RHIC (STAR). We compare our results to the Poisson and negative binomial (NBD) expectations, as well as to Ultra-relativistic Quantum Molecular Dynamics (UrQMD) and Hadron Resonance Gas (HRG) model predictions. Both NBD and Poisson baselines agree with data within the statistical and systematic uncertainties. The ratios of the measured cumulants show no features of critical fluctuations. The chemical freeze-out temperatures extracted from a recent HRG calculation, which was successfully used to describe the net-proton, net-kaon and net-charge data, indicate $\Lambda$ freeze-out conditions similar to those of kaons. However, large deviations are found when comparing to temperatures obtained from net-proton fluctuations. The net-$\Lambda$ cumulants show a weak, but finite, dependence on the rapidity coverage in the acceptance of the detector, which can be attributed to quantum number conservation.
Non-monotonic energy dependence of net-proton number fluctuations
STAR Collaboration, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, A. Aparin, E. C. Aschenauer, M. U. Ashraf, F. G. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, K. Barish, A. Behera, R. Bellwied, et al (339)
Jan 10 2020 nucl-ex hep-ex hep-ph nucl-th arXiv:2001.02852v3

@misc{2001.02852, author = {STAR Collaboration and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and A.~Aparin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~G.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and K.~Barish and A.~Behera and R.~Bellwied and A.~Bhasin and J.~Bielcik and J.~Bielcikova and L.~C.~Bland and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and J.~Butterworth and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and D.~Chen and J.~H.~Chen and X.~Chen and Z.~Chen and J.~Cheng and M.~Cherney and M.~Chevalier and S.~Choudhury and W.~Christie and H.~J.~Crawford and M.~Csanád and M.~Daugherity and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and L.~Didenko and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and T.~Edmonds and N.~Elsey and J.~Engelage and G.~Eppley and R.~Esha and S.~Esumi and O.~Evdokimov and A.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and P.~Federic and J.~Fedorisin and C.~J.~Feng and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and A.~Francisco and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and A.~Gibson and K.~Gopal and D.~Grosnick and W.~Guryn and A.~I.~Hamad and A.~Hamed and J.~W.~Harris and S.~He and W.~He and X.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and E.~Hoffman and L.~Holub and Y.~Hong and S.~Horvat and Y.~Hu and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and T.~J.~Humanic and P.~Huo and G.~Igo and D.~Isenhower and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~JI and J.~Jia and K.~Jiang and S.~Jowzaee and X.~Ju and E.~G.~Judd and S.~Kabana and M.~L.~Kabir and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and B.~Kimelman and D.~Kincses and T.~A.~Kinghorn and I.~Kisel and A.~Kiselev and A.~Kisiel and M.~Kocan and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and K.~Krueger and N.~Kulathunga Mudiyanselage and L.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and S.~Lan and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and Y.~H.~Leung and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Liang and R.~Licenik and T.~Lin and Y.~Lin and M.~A.~Lisa and F.~Liu and H.~Liu and P.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and R.~S.~Longacre and N.~S.~Lukow and S.~Luo and X.~Luo and G.~L.~Ma and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and J.~A.~Mazer and N.~G.~Minaev and S.~Mioduszewski and B.~Mohanty and I.~Mooney and Z.~Moravcova and D.~A.~Morozov and M.~Nagy and J.~D.~Nam and Md.~Nasim and K.~Nayak and D.~Neff and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and A.~Pandav and Y.~Panebratsev and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and L.~Pinsky and R.~L.~Pintér and J.~Pluta and J.~Porter and M.~Posik and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and H.~Qiu and A.~Quintero and S.~K.~Radhakrishnan and S.~Ramachandran and R.~L.~Ray and R.~Reed and H.~G.~Ritter and J.~B.~Roberts and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and N.~R.~Sahoo and H.~Sako and S.~Salur and J.~Sandweiss and S.~Sato and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and F.~Shen and W.~Q.~Shen and S.~S.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and N.~Smirnov and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and M.~Sumbera and B.~Summa and X.~M.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and O.~D.~Tsai and Z.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and J.~S.~Wang and P.~Wang and Y.~Wang and Y.~Wang and Z.~Wang and J.~C.~Webb and P.~C.~Weidenkaff and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and Y.~Wu and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~F.~Xu and Y.~Xu and Z.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and H.~Zbroszczyk and W.~Zha and D.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Y.~Zhang and Z.~J.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhong and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{N}on-monotonic energy dependence of net-proton number fluctuations}, year = {2020}, eprint = {2001.02852}, howpublished = {Physical Review Letters 126 (2021) 092301}, doi = {10.1103/PhysRevLett.126.092301}, note = {arXiv:2001.02852v3} }
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Non-monotonic variation with collision energy ($\sqrt{s_{\rm NN}}$) of the moments of the net-baryon number distribution in heavy-ion collisions, related to the correlation length and the susceptibilities of the system, is suggested as a signature for the Quantum Chromodynamics (QCD) critical point. We report the first evidence of a non-monotonic variation in kurtosis times variance of the net-proton number (proxy for net-baryon number) distribution as a function of \rootsnn with 3.1$\sigma$ significance, for head-on (central) gold-on-gold (Au+Au) collisions measured using the STAR detector at RHIC. Data in non-central Au+Au collisions and models of heavy-ion collisions without a critical point show a monotonic variation as a function of $\sqrt{s_{\rm NN}}$.
First observation of the directed flow of $D^{0}$ and $\overline{D^0}$ in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200~GeV
STAR Collaboration, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, K. Barish, et al (332)
May 07 2019 nucl-ex hep-ex nucl-th arXiv:1905.02052v1

@misc{1905.02052, author = {STAR Collaboration and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and R.~Aoyama and A.~Aparin and D.~Arkhipkin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and K.~Barish and A.~J.~Bassill and A.~Behera and R.~Bellwied and A.~Bhasin and A.~K.~Bhati and J.~Bielcik and J.~Bielcikova and L.~C.~Bland and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and J.~Bryslawskyj and I.~Bunzarov and J.~Butterworth and H.~Caines and M.~Calderón~de~la~Barca~Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and J.~H.~Chen and X.~Chen and J.~Cheng and M.~Cherney and W.~Christie and H.~J.~Crawford and M.~Csanád and S.~Das and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and L.~Didenko and C.~Dilks and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and T.~Edmonds and N.~Elsey and J.~Engelage and G.~Eppley and R.~Esha and S.~Esumi and O.~Evdokimov and J.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and P.~Federic and J.~Fedorisin and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and A.~Gibson and K.~Gopal and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and J.~W.~Harris and L.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and L.~Holub and Y.~Hong and S.~Horvat and B.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and T.~J.~Humanic and P.~Huo and G.~Igo and W.~W.~Jacobs and C.~Jena and A.~Jentsch and Y.~JI and J.~Jia and K.~Jiang and S.~Jowzaee and X.~Ju and E.~G.~Judd and S.~Kabana and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and T.~A.~Kinghorn and I.~Kisel and A.~Kisiel and M.~Kocan and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and K.~Krueger and N.~Kulathunga Mudiyanselage and L.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Liang and R.~Licenik and T.~Lin and A.~Lipiec and M.~A.~Lisa and F.~Liu and H.~Liu and P.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and M.~Lomnitz and R.~S.~Longacre and S.~Luo and X.~Luo and G.~L.~Ma and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and O.~Matonoha and J.~A.~Mazer and K.~Meehan and J.~C.~Mei and N.~G.~Minaev and S.~Mioduszewski and D.~Mishra and B.~Mohanty and M.~M.~Mondal and I.~Mooney and Z.~Moravcova and D.~A.~Morozov and Md.~Nasim and K.~Nayak and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and K.~Oh and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and Y.~Panebratsev and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and R.~L.~Pintér and J.~Pluta and J.~Porter and M.~Posik and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and A.~Quintero and S.~K.~Radhakrishnan and S.~Ramachandran and R.~L.~Ray and R.~Reed and H.~G.~Ritter and J.~B.~Roberts and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and O.~Rusnakova and N.~R.~Sahoo and P.~K.~Sahu and S.~Salur and J.~Sandweiss and J.~Schambach and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and F.~Shen and W.~Q.~Shen and S.~S.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and S.~Siejka and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and D.~Smirnov and N.~Smirnov and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and T.~Sugiura and M.~Sumbera and B.~Summa and X.~M.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and O.~D.~Tsai and B.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and P.~Wang and Y.~Wang and Y.~Wang and J.~C.~Webb and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and Y.~Wu and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~F.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and I.~-K.~Yoo and H.~Zbroszczyk and W.~Zha and D.~Zhang and L.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhong and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{F}irst observation of the directed flow of ${D}^{0}$ and $\overline{{D}^0}$ in {A}u+{A}u collisions at $\sqrt{s_{\rm {NN}}}$ = 200~{G}e{V}}, year = {2019}, eprint = {1905.02052}, note = {arXiv:1905.02052v1} }
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We report the first measurement of rapidity-odd directed flow ($v_{1}$) for $D^{0}$ and $\overline{D^{0}}$ mesons at mid-rapidity ($|y| < 0.8$) in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 200\u2009GeV using the STAR detector at the Relativistic Heavy Ion Collider. In 10--80\% Au+Au collisions, the slope of the $v_{1}$ rapidity dependence ($dv_{1}/dy$), averaged over $D^{0}$ and $\overline{D^{0}}$ mesons, is -0.080 $\pm$ 0.017 (stat.) $\pm$ 0.016 (syst.) for transverse momentum $p_{\rm T}$ above 1.5~GeV/$c$. The absolute value of $D^0$-meson $dv_1/dy$ is about 25 times larger than that for charged kaons, with 3.4$\sigma$ significance. These data give a unique insight into the initial tilt of the produced matter, and offer constraints on the geometric and transport parameters of the hot QCD medium created in relativistic heavy-ion collisions.
Measurement of the mass difference and the binding energy of the hypertriton and antihypertriton
STAR Collaboration, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, K. Barish, et al (330)
Apr 25 2019 hep-ex nucl-ex nucl-th arXiv:1904.10520v2

@misc{1904.10520, author = {STAR Collaboration and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and R.~Aoyama and A.~Aparin and D.~Arkhipkin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and K.~Barish and A.~J.~Bassill and A.~Behera and R.~Bellwied and A.~Bhasin and A.~K.~Bhati and J.~Bielcik and J.~Bielcikova and L.~C.~Bland and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and J.~Bryslawskyj and I.~Bunzarov and J.~Butterworth and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and J.~H.~Chen and X.~Chen and J.~Cheng and M.~Cherney and W.~Christie and H.~J.~Crawford and M.~Csanád and S.~Das and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and L.~Didenko and C.~Dilks and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and T.~Edmonds and N.~Elsey and J.~Engelage and G.~Eppley and R.~Esha and S.~Esumi and O.~Evdokimov and J.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and P.~Federic and J.~Fedorisin and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and A.~Gibson and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and J.~W.~Harris and L.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and L.~Holub and Y.~Hong and S.~Horvat and B.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and T.~J.~Humanic and P.~Huo and G.~Igo and W.~W.~Jacobs and A.~Jentsch and Y.~JI and J.~Jia and K.~Jiang and S.~Jowzaee and X.~Ju and E.~G.~Judd and S.~Kabana and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and T.~A.~Kinghorn and I.~Kisel and A.~Kisiel and M.~Kocan and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and K.~Krueger and N.~Kulathunga Mudiyanselage and L.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Liang and R.~Licenik and T.~Lin and A.~Lipiec and M.~A.~Lisa and F.~Liu and H.~Liu and P.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and M.~Lomnitz and R.~S.~Longacre and S.~Luo and X.~Luo and G.~L.~Ma and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and O.~Matonoha and J.~A.~Mazer and K.~Meehan and J.~C.~Mei and N.~G.~Minaev and S.~Mioduszewski and D.~Mishra and B.~Mohanty and M.~M.~Mondal and I.~Mooney and Z.~Moravcova and D.~A.~Morozov and Md.~Nasim and K.~Nayak and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and K.~Oh and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and Y.~Panebratsev and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and R.~L.~Pintér and J.~Pluta and J.~Porter and M.~Posik and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and A.~Quintero and S.~K.~Radhakrishnan and S.~Ramachandran and R.~L.~Ray and R.~Reed and H.~G.~Ritter and J.~B.~Roberts and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and O.~Rusnakova and N.~R.~Sahoo and P.~K.~Sahu and S.~Salur and J.~Sandweiss and J.~Schambach and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and F.~Shen and W.~Q.~Shen and S.~S.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and S.~Siejka and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and D.~Smirnov and N.~Smirnov and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and T.~Sugiura and M.~Sumbera and B.~Summa and X.~M.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and O.~D.~Tsai and B.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and P.~Wang and Y.~Wang and Y.~Wang and J.~C.~Webb and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and Y.~Wu and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~F.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and I.~-K.~Yoo and H.~Zbroszczyk and W.~Zha and D.~Zhang and L.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhong and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{M}easurement of the mass difference and the binding energy of the hypertriton and antihypertriton}, year = {2019}, eprint = {1904.10520}, doi = {10.1038/s41567-020-0799-7}, note = {arXiv:1904.10520v2} }
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According to the CPT theorem, which states that the combined operation of charge conjugation, parity transformation and time reversal must be conserved, particles and their antiparticles should have the same mass and lifetime but opposite charge and magnetic moment. Here, we test CPT symmetry in a nucleus containing a strange quark, more specifically in the hypertriton. This hypernucleus is the lightest one yet discovered and consists of a proton, a neutron, and a $\Lambda$ hyperon. With data recorded by the STAR detector\citeTPC,HFT,TOF at the Relativistic Heavy Ion Collider, we measure the $\Lambda$ hyperon binding energy $B_{\Lambda}$ for the hypertriton, and find that it differs from the widely used value\citeB_1973 and from predictions\cite2019_weak, 1995_weak, 2002_weak, 2014_weak, where the hypertriton is treated as a weakly bound system. Our results place stringent constraints on the hyperon-nucleon interaction\citeHammer2002, STAR-antiH3L, and have implications for understanding neutron star interiors, where strange matter may be present\citeChatterjee2016. A precise comparison of the masses of the hypertriton and the antihypertriton allows us to test CPT symmetry in a nucleus with strangeness for the first time, and we observe no deviation from the expected exact symmetry.
Disentangle contributions to small-system collectivity via scans of light nucleus-nucleus collisions
Shengli Huang, Zhenyu Chen, Jiangyong Jia, Wei Li
Apr 24 2019 nucl-ex hep-ph nucl-th arXiv:1904.10415v2

@misc{1904.10415, author = {Shengli Huang and Zhenyu Chen and Jiangyong Jia and Wei Li}, title = {{D}isentangle contributions to small-system collectivity via scans of light nucleus-nucleus collisions}, year = {2019}, eprint = {1904.10415}, note = {arXiv:1904.10415v2} }
PDF
The observation of multi-particle azimuthal correlations in high-energy small-system collisions has led to intense debate on its origin and the possible coexistence from two competing theoretical scenarios: one based on initial-state intrinsic momentum anisotropy (ISM), and the other based on final-state collective response to the collision geometry (FSM). To complement the previous scan of asymmetric collision systems ($p$+Au, $d$+Au and He+Au), we propose a scan of small symmetric collision systems at RHIC, such as C+C, O+O, Al+Al and Ar+Ar $\sqrt{s_{\mathrm{NN}}}=0.2$ TeV, to provide further insights in disentangling contributions from these two scenarios. These symmetric small systems have the advantage of providing a better controlled initial geometry dominated by the average shape of the overlap region, as opposed to fluctuation-driven geometries in asymmetric systems. A transport model is employed to investigate the expected geometry response in the FSM scenario. Different trends of elliptic flow with increasing charge particle multiplicity are observed between symmetric and asymmetric systems, while triangular flow appears to show a similar behavior. Furthermore, a comparison of O+O collisions at $\sqrt{s_{\mathrm{NN}}}=0.2$ TeV and at $\sqrt{s_{\mathrm{NN}}}=2.76-7$ TeV, as proposed at the LHC, provides a unique opportunity to disentangle the collision geometry effects at nucleon level from those arising from subnucleon fluctuations.
Beam energy dependence of (anti-)deuteron production in Au+Au collisions at RHIC
J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, K. Barish, A. J. Bassill, et al (328)
Mar 29 2019 nucl-ex hep-ex nucl-th arXiv:1903.11778v2

@misc{1903.11778, author = {J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and R.~Aoyama and A.~Aparin and D.~Arkhipkin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and K.~Barish and A.~J.~Bassill and A.~Behera and R.~Bellwied and A.~Bhasin and A.~K.~Bhati and J.~Bielcik and J.~Bielcikova and L.~C.~Bland and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and J.~Bryslawskyj and I.~Bunzarov and J.~Butterworth and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and J.~H.~Chen and X.~Chen and J.~Cheng and M.~Cherney and W.~Christie and H.~J.~Crawford and M.~Csanád and S.~Das and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and L.~Didenko and C.~Dilks and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and T.~Edmonds and N.~Elsey and J.~Engelage and G.~Eppley and R.~Esha and S.~Esumi and O.~Evdokimov and J.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and P.~Federic and J.~Fedorisin and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and A.~Gibson and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and J.~W.~Harris and L.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and L.~Holub and Y.~Hong and S.~Horvat and B.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and T.~J.~Humanic and P.~Huo and G.~Igo and W.~W.~Jacobs and A.~Jentsch and J.~Jia and K.~Jiang and S.~Jowzaee and X.~Ju and E.~G.~Judd and S.~Kabana and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and T.~A.~Kinghorn and I.~Kisel and A.~Kisiel and M.~Kocan and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and K.~Krueger and N.~Kulathunga Mudiyanselage and L.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Liang and R.~Licenik and T.~Lin and A.~Lipiec and M.~A.~Lisa and F.~Liu and H.~Liu and P.~Liu and P.~Liu and T.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and M.~Lomnitz and R.~S.~Longacre and S.~Luo and X.~Luo and G.~L.~Ma and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and O.~Matonoha and J.~A.~Mazer and K.~Meehan and J.~C.~Mei and N.~G.~Minaev and S.~Mioduszewski and D.~Mishra and B.~Mohanty and M.~M.~Mondal and I.~Mooney and Z.~Moravcova and D.~A.~Morozov and Md.~Nasim and K.~Nayak and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and K.~Oh and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and Y.~Panebratsev and B.~Pawlik and D.~Pawlowska and H.~Pei and C.~Perkins and R.~L.~Pintér and J.~Pluta and J.~Porter and M.~Posik and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and A.~Quintero and S.~K.~Radhakrishnan and S.~Ramachandran and R.~L.~Ray and R.~Reed and H.~G.~Ritter and J.~B.~Roberts and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and O.~Rusnakova and N.~R.~Sahoo and P.~K.~Sahu and S.~Salur and J.~Sandweiss and J.~Schambach and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and F.~Shen and W.~Q.~Shen and S.~S.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and S.~Siejka and R.~Sikora and M.~Simko and J.~Singh and S.~Singha and D.~Smirnov and N.~Smirnov and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and M.~Stefaniak and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and T.~Sugiura and M.~Sumbera and B.~Summa and X.~M.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and D.~Tlusty and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and O.~D.~Tsai and B.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and P.~Wang and Y.~Wang and Y.~Wang and J.~C.~Webb and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and Y.~Wu and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~F.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and N.~Yu and I.~-K.~Yoo and H.~Zbroszczyk and W.~Zha and D.~Zhang and L.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhong and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{B}eam energy dependence of (anti-)deuteron production in {A}u+{A}u collisions at {RHIC}}, year = {2019}, eprint = {1903.11778}, note = {arXiv:1903.11778v2} }
PDF
We report the energy dependence of mid-rapidity (anti-)deuteron production in Au+Au collisions at $\sqrt{s_\text{NN}} =\ $7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV, measured by the STAR experiment at RHIC. The yield of deuterons is found to be well described by the thermal model. The collision energy, centrality, and transverse momentum dependence of the coalescence parameter $B_2$ are discussed. We find that the values of $B_2$ for anti-deuterons are systematically lower than those for deuterons, indicating that the correlation volume of anti-baryons is larger than that of baryons at $\sqrt{s_\text{NN}}$ from 19.6 to 39 GeV. In addition, values of $B_2$ are found to vary with collision energy and show a broad minimum around $\sqrt{s_\text{NN}}=\ $20 to 40 GeV, which might imply a change of the equation of state of the medium in these collisions.
Azimuthal harmonics in small and large collision systems at RHIC top energies
STAR Collaboration, J. Adam, L. Adamczyk, J. R. Adams, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, F. Atetalla, A. Attri, G. S. Averichev, V. Bairathi, K. Barish, et al (324)
Jan 25 2019 nucl-ex nucl-th arXiv:1901.08155v1

@misc{1901.08155, author = {STAR Collaboration and J.~Adam and L.~Adamczyk and J.~R.~Adams and J.~K.~Adkins and G.~Agakishiev and M.~M.~Aggarwal and Z.~Ahammed and I.~Alekseev and D.~M.~Anderson and R.~Aoyama and A.~Aparin and D.~Arkhipkin and E.~C.~Aschenauer and M.~U.~Ashraf and F.~Atetalla and A.~Attri and G.~S.~Averichev and V.~Bairathi and K.~Barish and A.~J.~Bassill and A.~Behera and R.~Bellwied and A.~Bhasin and A.~K.~Bhati and J.~Bielcik and J.~Bielcikova and L.~C.~Bland and I.~G.~Bordyuzhin and J.~D.~Brandenburg and A.~V.~Brandin and J.~Bryslawskyj and I.~Bunzarov and J.~Butterworth and H.~Caines and M.~Calderón de la Barca Sánchez and D.~Cebra and I.~Chakaberia and P.~Chaloupka and B.~K.~Chan and F-H.~Chang and Z.~Chang and N.~Chankova-Bunzarova and A.~Chatterjee and S.~Chattopadhyay and J.~H.~Chen and X.~Chen and J.~Cheng and M.~Cherney and W.~Christie and H.~J.~Crawford and M.~Csanád and S.~Das and T.~G.~Dedovich and I.~M.~Deppner and A.~A.~Derevschikov and L.~Didenko and C.~Dilks and X.~Dong and J.~L.~Drachenberg and J.~C.~Dunlop and T.~Edmonds and N.~Elsey and J.~Engelage and G.~Eppley and R.~Esha and S.~Esumi and O.~Evdokimov and J.~Ewigleben and O.~Eyser and R.~Fatemi and S.~Fazio and P.~Federic and J.~Fedorisin and Y.~Feng and P.~Filip and E.~Finch and Y.~Fisyak and L.~Fulek and C.~A.~Gagliardi and T.~Galatyuk and F.~Geurts and A.~Gibson and D.~Grosnick and A.~Gupta and W.~Guryn and A.~I.~Hamad and A.~Hamed and J.~W.~Harris and L.~He and S.~Heppelmann and S.~Heppelmann and N.~Herrmann and L.~Holub and Y.~Hong and S.~Horvat and B.~Huang and H.~Z.~Huang and S.~L.~Huang and T.~Huang and X.~Huang and T.~J.~Humanic and P.~Huo and G.~Igo and W.~W.~Jacobs and A.~Jentsch and J.~Jia and K.~Jiang and S.~Jowzaee and X.~Ju and E.~G.~Judd and S.~Kabana and S.~Kagamaster and D.~Kalinkin and K.~Kang and D.~Kapukchyan and K.~Kauder and H.~W.~Ke and D.~Keane and A.~Kechechyan and M.~Kelsey and Y.~V.~Khyzhniak and D.~P.~Kikoła and C.~Kim and T.~A.~Kinghorn and I.~Kisel and A.~Kisiel and M.~Kocan and L.~Kochenda and L.~K.~Kosarzewski and L.~Kramarik and P.~Kravtsov and K.~Krueger and N.~Kulathunga Mudiyanselage and L.~Kumar and R.~Kunnawalkam Elayavalli and J.~H.~Kwasizur and R.~Lacey and J.~M.~Landgraf and J.~Lauret and A.~Lebedev and R.~Lednicky and J.~H.~Lee and C.~Li and W.~Li and W.~Li and X.~Li and Y.~Li and Y.~Liang and R.~Licenik and T.~Lin and A.~Lipiec and M.~A.~Lisa and F.~Liu and H.~Liu and P.~Liu and P.~Liu and X.~Liu and Y.~Liu and Z.~Liu and T.~Ljubicic and W.~J.~Llope and M.~Lomnitz and R.~S.~Longacre and S.~Luo and X.~Luo and G.~L.~Ma and L.~Ma and R.~Ma and Y.~G.~Ma and N.~Magdy and R.~Majka and D.~Mallick and S.~Margetis and C.~Markert and H.~S.~Matis and O.~Matonoha and J.~A.~Mazer and K.~Meehan and J.~C.~Mei and N.~G.~Minaev and S.~Mioduszewski and D.~Mishra and B.~Mohanty and M.~M.~Mondal and I.~Mooney and Z.~Moravcova and D.~A.~Morozov and Md.~Nasim and K.~Nayak and J.~M.~Nelson and D.~B.~Nemes and M.~Nie and G.~Nigmatkulov and T.~Niida and L.~V.~Nogach and T.~Nonaka and G.~Odyniec and A.~Ogawa and K.~Oh and S.~Oh and V.~A.~Okorokov and B.~S.~Page and R.~Pak and Y.~Panebratsev and B.~Pawlik and H.~Pei and C.~Perkins and R.~L.~Pintér and J.~Pluta and J.~Porter and M.~Posik and N.~K.~Pruthi and M.~Przybycien and J.~Putschke and A.~Quintero and S.~K.~Radhakrishnan and S.~Ramachandran and R.~L.~Ray and R.~Reed and H.~G.~Ritter and J.~B.~Roberts and O.~V.~Rogachevskiy and J.~L.~Romero and L.~Ruan and J.~Rusnak and O.~Rusnakova and N.~R.~Sahoo and P.~K.~Sahu and S.~Salur and J.~Sandweiss and J.~Schambach and W.~B.~Schmidke and N.~Schmitz and B.~R.~Schweid and F.~Seck and J.~Seger and M.~Sergeeva and R.~Seto and P.~Seyboth and N.~Shah and E.~Shahaliev and P.~V.~Shanmuganathan and M.~Shao and F.~Shen and W.~Q.~Shen and S.~S.~Shi and Q.~Y.~Shou and E.~P.~Sichtermann and S.~Siejka and R.~Sikora and M.~Simko and J Singh and S.~Singha and D.~Smirnov and N.~Smirnov and W.~Solyst and P.~Sorensen and H.~M.~Spinka and B.~Srivastava and T.~D.~S.~Stanislaus and D.~J.~Stewart and M.~Strikhanov and B.~Stringfellow and A.~A.~P.~Suaide and T.~Sugiura and M.~Sumbera and B.~Summa and X.~M.~Sun and Y.~Sun and Y.~Sun and B.~Surrow and D.~N.~Svirida and P.~Szymanski and A.~H.~Tang and Z.~Tang and A.~Taranenko and T.~Tarnowsky and J.~H.~Thomas and A.~R.~Timmins and T.~Todoroki and M.~Tokarev and C.~A.~Tomkiel and S.~Trentalange and R.~E.~Tribble and P.~Tribedy and S.~K.~Tripathy and O.~D.~Tsai and B.~Tu and T.~Ullrich and D.~G.~Underwood and I.~Upsal and G.~Van Buren and J.~Vanek and A.~N.~Vasiliev and I.~Vassiliev and F.~Videbæk and S.~Vokal and S.~A.~Voloshin and F.~Wang and G.~Wang and P.~Wang and Y.~Wang and Y.~Wang and J.~C.~Webb and L.~Wen and G.~D.~Westfall and H.~Wieman and S.~W.~Wissink and R.~Witt and Y.~Wu and Z.~G.~Xiao and G.~Xie and W.~Xie and H.~Xu and N.~Xu and Q.~H.~Xu and Y.~F.~Xu and Z.~Xu and C.~Yang and Q.~Yang and S.~Yang and Y.~Yang and Z.~Ye and Z.~Ye and L.~Yi and K.~Yip and I.~-K.~Yoo and H.~Zbroszczyk and W.~Zha and D.~Zhang and L.~Zhang and S.~Zhang and S.~Zhang and X.~P.~Zhang and Y.~Zhang and Z.~Zhang and J.~Zhao and C.~Zhong and C.~Zhou and X.~Zhu and Z.~Zhu and M.~Zurek and M.~Zyzak}, title = {{A}zimuthal harmonics in small and large collision systems at {RHIC} top energies}, year = {2019}, eprint = {1901.08155}, note = {arXiv:1901.08155v1} }
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The first ($v_1^{\text{even}}$), second ($v_2$) and third ($v_3$) harmonic coefficients of the azimuthal particle distribution at mid-rapidity, are extracted for charged hadrons and studied as a function of transverse momentum ($p_T$) and mean charged particle multiplicity density $\langle \mathrm{N_{ch}} \rangle$ in U+U ($\roots =193$~GeV), Au+Au, Cu+Au, Cu+Cu, $d$+Au and $p$+Au collisions at $\roots = 200$~GeV with the STAR Detector. For the same $\langle \mathrm{N_{ch}} \rangle$, the $v_1^{\text{even}}$ and $v_3$ coefficients are observed to be independent of collision system, while $v_2$ exhibits such a scaling only when normalized by the initial-state eccentricity ($\varepsilon_2$). The data also show that $\ln(v_2/\varepsilon_2)$ scales linearly with $\langle \mathrm{N_{ch}} \rangle^{-1/3}$. These measurements provide insight into initial-geometry fluctuations and the role of viscous hydrodynamic attenuation on $v_n$ from small to large collision systems.
Evidence for rotational to vibrational evolution along the yrast line in the odd-A rare-earth nuclei
H. B. Zhou, S. Huang, G. X. Dong, Z. X. Shen, H. J. Lu, L. L. Wang, X. J. Sun, F. R. Xu
Jan 31 2018 nucl-th arXiv:1801.09824v1

@misc{1801.09824, author = {H.~B.~Zhou and S.~Huang and G.~X.~Dong and Z.~X.~Shen and H.~J.~Lu and L.~L.~Wang and X.~J.~Sun and F.~R.~Xu}, title = {{E}vidence for rotational to vibrational evolution along the yrast line in the odd-{A} rare-earth nuclei}, year = {2018}, eprint = {1801.09824}, note = {arXiv:1801.09824v1} }
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The phase transition of nuclei to increasing angular momentum (or spin) and excitation energy is one of the most fundamental topics of nuclear structure research. The odd-N nuclei with A equal 160 are widely considered belonging to the well-deformed region, and their excitation spectra are energetically favored to exhibit the rotational characteristics. In the present work, however, there is evidence indicating that the nuclei can evolve from rotation to vibration along the yrast lines while increasing spin. The simple method, named as E-Gamma Over Spin (E-GOS) curves, would be used to discern the evolution from rotational to vibrational structure in nuclei as a function of spin. In addition, in order to get the insight into the rotational-like properties of nuclei, theoretical calculations have been performed for the yrast bands of the odd-A rare-earth nuclei using the total Routhian surfaces (TRS) model. The TRS plots indicate that the 165Yb and 157Dy isotopes have stable prolate shapes at low spin states. At higher rotational frequency (larger than 0.50 MeV), a distinct decrease in the quadrupole deformation is predicted by the calculations, and the isotopes becomes rigid in the gamma deformation.
Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+Au collisions at sqrt(s_NN) = 200 GeV
A. Adare, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander, K. Aoki, Y. Aramaki, E.T. Atomssa, R. Averbeck, T.C. Awes, B. Azmoun, V. Babintsev, M. Bai, G. Baksay, L. Baksay, K.N. Barish, B. Bassalleck, A.T. Basye, et al (366)
Mar 13 2012 nucl-ex nucl-th arXiv:1203.2644v1

@misc{1203.2644, author = {A.~Adare and S.~Afanasiev and C.~Aidala and N.N.~Ajitanand and Y.~Akiba and H.~Al-Bataineh and J.~Alexander and K.~Aoki and Y.~Aramaki and E.T.~Atomssa and R.~Averbeck and T.C.~Awes and B.~Azmoun and V.~Babintsev and M.~Bai and G.~Baksay and L.~Baksay and K.N.~Barish and B.~Bassalleck and A.T.~Basye and S.~Bathe and V.~Baublis and C.~Baumann and A.~Bazilevsky and S.~Belikov and R.~Belmont and R.~Bennett and A.~Berdnikov and Y.~Berdnikov and A.A.~Bickley and J.S.~Bok and K.~Boyle and M.L.~Brooks and H.~Buesching and V.~Bumazhnov and G.~Bunce and S.~Butsyk and C.M.~Camacho and S.~Campbell and C.-H.~Chen and C.Y.~Chi and M.~Chiu and I.J.~Choi and R.K.~Choudhury and P.~Christiansen and T.~Chujo and P.~Chung and O.~Chvala and V.~Cianciolo and Z.~Citron and B.A.~Cole and M.~Connors and P.~Constantin and M.~Csanád and T.~Csörgö and T.~Dahms and S.~Dairaku and I.~Danchev and K.~Das and A.~Datta and G.~David and A.~Denisov and A.~Deshpande and E.J.~Desmond and O.~Dietzsch and A.~Dion and M.~Donadelli and O.~Drapier and A.~Drees and K.A.~Drees and J.M.~Durham and A.~Durum and D.~Dutta and S.~Edwards and Y.V.~Efremenko and F.~Ellinghaus and T.~Engelmore and A.~Enokizono and H.~En'yo and S.~Esumi and B.~Fadem and D.E.~Fields and M.~Finger and M.~Finger and \ and Jr.~and F.~Fleuret and S.L.~Fokin and Z.~Fraenkel and J.E.~Frantz and A.~Franz and A.D.~Frawley and K.~Fujiwara and Y.~Fukao and T.~Fusayasu and I.~Garishvili and A.~Glenn and H.~Gong and M.~Gonin and Y.~Goto and R.~Granier de Cassagnac and N.~Grau and S.V.~Greene and M.~Grosse Perdekamp and T.~Gunji and H.-Å.~Gustafsson and J.S.~Haggerty and K.I.~Hahn and H.~Hamagaki and J.~Hamblen and R.~Han and J.~Hanks and E.P.~Hartouni and E.~Haslum and R.~Hayano and X.~He and M.~Heffner and T.K.~Hemmick and T.~Hester and J.C.~Hill and M.~Hohlmann and W.~Holzmann and K.~Homma and B.~Hong and T.~Horaguchi and D.~Hornback and S.~Huang and T.~Ichihara and R.~Ichimiya and J.~Ide and Y.~Ikeda and K.~Imai and M.~Inaba and D.~Isenhower and M.~Ishihara and T.~Isobe and M.~Issah and A.~Isupov and D.~Ivanischev and B.V.~Jacak and J.~Jia and J.~Jin and B.M.~Johnson and K.S.~Joo and D.~Jouan and D.S.~Jumper and F.~Kajihara and S.~Kametani and N.~Kamihara and J.~Kamin and J.H.~Kang and J.~Kapustinsky and K.~Karatsu and D.~Kawall and M.~Kawashima and A.V.~Kazantsev and T.~Kempel and A.~Khanzadeev and K.M.~Kijima and B.I.~Kim and D.H.~Kim and D.J.~Kim and E.~Kim and E.J.~Kim and S.H.~Kim and Y.J.~Kim and E.~Kinney and K.~Kiriluk and Á.~Kiss and E.~Kistenev and L.~Kochenda and B.~Komkov and M.~Konno and J.~Koster and D.~Kotchetkov and A.~Kozlov and A.~Král and A.~Kravitz and G.J.~Kunde and K.~Kurita and M.~Kurosawa and Y.~Kwon and G.S.~Kyle and R.~Lacey and Y.S.~Lai and J.G.~Lajoie and A.~Lebedev and D.M.~Lee and J.~Lee and K.~Lee and K.B.~Lee and K.S.~Lee and M.J.~Leitch and M.A.L.~Leite and E.~Leitner and B.~Lenzi and X.~Li and P.~Liebing and L.A.~Linden Levy and T.~Liška and A.~Litvinenko and H.~Liu and M.X.~Liu and B.~Love and R.~Luechtenborg and D.~Lynch and C.F.~Maguire and Y.I.~Makdisi and A.~Malakhov and M.D.~Malik and V.I.~Manko and E.~Mannel and Y.~Mao and H.~Masui and F.~Matathias and M.~McCumber and P.L.~McGaughey and N.~Means and B.~Meredith and Y.~Miake and A.C.~Mignerey and P.~Mikeš and K.~Miki and A.~Milov and M.~Mishra and J.T.~Mitchell and A.K.~Mohanty and Y.~Morino and A.~Morreale and D.P.~Morrison and T.V.~Moukhanova and J.~Murata and S.~Nagamiya and J.L.~Nagle and M.~Naglis and M.I.~Nagy and I.~Nakagawa and Y.~Nakamiya and T.~Nakamura and K.~Nakano and J.~Newby and M.~Nguyen and R.~Nouicer and A.S.~Nyanin and E.~O'Brien and S.X.~Oda and C.A.~Ogilvie and M.~Oka and K.~Okada and Y.~Onuki and A.~Oskarsson and M.~Ouchida and K.~Ozawa and R.~Pak and V.~Pantuev and V.~Papavassiliou and I.H.~Park and J.~Park and S.K.~Park and W.J.~Park and S.F.~Pate and H.~Pei and J.-C.~Peng and H.~Pereira and V.~Peresedov and D.Yu.~Peressounko and C.~Pinkenburg and R.P.~Pisani and M.~Proissl and M.L.~Purschke and A.K.~Purwar and H.~Qu and J.~Rak and A.~Rakotozafindrabe and I.~Ravinovich and K.F.~Read and K.~Reygers and V.~Riabov and Y.~Riabov and E.~Richardson and D.~Roach and G.~Roche and S.D.~Rolnick and M.~Rosati and C.A.~Rosen and S.S.E.~Rosendahl and P.~Rosnet and P.~Rukoyatkin and P.~Ružička and B.~Sahlmueller and N.~Saito and T.~Sakaguchi and K.~Sakashita and V.~Samsonov and S.~Sano and T.~Sato and S.~Sawada and K.~Sedgwick and J.~Seele and R.~Seidl and A.Yu.~Semenov and R.~Seto and D.~Sharma and I.~Shein and T.-A.~Shibata and K.~Shigaki and M.~Shimomura and K.~Shoji and P.~Shukla and A.~Sickles and C.L.~Silva and D.~Silvermyr and C.~Silvestre and K.S.~Sim and B.K.~Singh and C.P.~Singh and V.~Singh and M.~Slunečka and R.A.~Soltz and W.E.~Sondheim and S.P.~Sorensen and I.V.~Sourikova and N.A.~Sparks and P.W.~Stankus and E.~Stenlund and S.P.~Stoll and T.~Sugitate and A.~Sukhanov and J.~Sziklai and E.M.~Takagui and A.~Taketani and R.~Tanabe and Y.~Tanaka and K.~Tanida and M.J.~Tannenbaum and S.~Tarafdar and A.~Taranenko and P.~Tarján and H.~Themann and T.L.~Thomas and M.~Togawa and A.~Toia and L.~Tomášek and H.~Torii and R.S.~Towell and I.~Tserruya and Y.~Tsuchimoto and C.~Vale and H.~Valle and H.W.~van Hecke and E.~Vazquez-Zambrano and A.~Veicht and J.~Velkovska and R.~Vértesi and A.A.~Vinogradov and M.~Virius and V.~Vrba and E.~Vznuzdaev and X.R.~Wang and D.~Watanabe and K.~Watanabe and Y.~Watanabe and F.~Wei and R.~Wei and J.~Wessels and S.N.~White and D.~Winter and J.P.~Wood and C.L.~Woody and R.M.~Wright and M.~Wysocki and W.~Xie and Y.L.~Yamaguchi and K.~Yamaura and R.~Yang and A.~Yanovich and J.~Ying and S.~Yokkaichi and Z.~You and G.R.~Young and I.~Younus and I.E.~Yushmanov and W.A.~Zajc and C.~Zhang and S.~Zhou and L.~Zolin}, title = {{D}eviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in {A}u+{A}u collisions at sqrt(s_{NN}) = 200 {G}e{V}}, year = {2012}, eprint = {1203.2644}, note = {arXiv:1203.2644v1} }
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Measurements of the anisotropy parameter v_2 of identified hadrons (pions, kaons, and protons) as a function of centrality, transverse momentum p_T, and transverse kinetic energy KE_T at midrapidity (|\eta|<0.35) in Au+Au collisions at sqrt(s_NN) = 200 GeV are presented. Pions and protons are identified up to p_T = 6 GeV/c, and kaons up to p_T = 4 GeV/c, by combining information from time-of-flight and aerogel Cherenkov detectors in the PHENIX Experiment. The scaling of v_2 with the number of valence quarks (n_q) has been studied in different centrality bins as a function of transverse momentum and transverse kinetic energy. A deviation from previously observed quark-number scaling is observed at large values of KE_T/n_q in noncentral Au+Au collisions (20--60%), but this scaling remains valid in central collisions (0--10%).
The Equation of State and Quark Number Susceptibility in Hard-Dense-Loop Approximation
Yu Jiang, Hua Li, Shi-song Huang, Wei-min Sun, Hong-shi Zong
Jul 13 2010 hep-ph nucl-th arXiv:1007.1713v1

@misc{1007.1713, author = {Yu Jiang and Hua Li and Shi-song Huang and Wei-min Sun and Hong-shi Zong}, title = {{T}he {E}quation of {S}tate and {Q}uark {N}umber {S}usceptibility in {H}ard-{D}ense-{L}oop {A}pproximation}, year = {2010}, eprint = {1007.1713}, note = {arXiv:1007.1713v1} }
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Based on the method proposed in [ H. S. Zong, W. M. Sun, Phys. Rev. \textbfD 78, 054001 (2008)], we calculate the equation of state (EOS) of QCD at zero temperature and finite quark chemical potential under the hard-dense-loop (HDL) approximation. A comparison between the EOS under HDL approximation and the cold, perturbative EOS of QCD proposed by Fraga, Pisarski and Schaffner-Bielich is made. It is found that the pressure under HDL approximation is generally smaller than the perturbative result. In addition, we also calculate the quark number susceptibility (QNS) at finite temperature and finite chemical potential under hard-thermal/dense-loop (HTL/HDL) approximation and compare our results with the corresponding ones in the previous literature.
Influence of the pion-nucleon interaction on the collective pion flow in heavy ion reactions
J. Zipprich, C. Fuchs, E. Lehmann, L. Sehn, S.W. Huang, Amand Faessler
Jun 10 1996 nucl-th arXiv:nucl-th/9606013v1

@misc{nucl-th/9606013, author = {J.~Zipprich and C.~Fuchs and E.~Lehmann and L.~Sehn and S.W.~Huang and Amand Faessler}, title = {{I}nfluence of the pion-nucleon interaction on the collective pion flow in heavy ion reactions}, year = {1996}, eprint = {nucl-th/9606013}, howpublished = {J.Phys. G23 (1997) L1}, doi = {10.1088/0954-3899/23/1/001}, note = {arXiv:nucl-th/9606013v1} }
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We investigate the influence of the real part of the in-medium pion optical potential on the pion dynamics in intermediate energy heavy ion reactions at 1 GeV/A. For different models, i.e. a phenomenological model and the $\Delta$--hole model, a pionic potential is extracted from the dispersion relation and used in Quantum Molecular Dynamics calculations. In addition with the inelastic scattering processes we thus take care of both, real and imaginary part of the pion optical potential. A strong influence of the real pionic potential on the pion in-plane flow is observed. In general such a potential has the tendency to reduce the anticorrelation of pion and nucleon flow in non-central collisions.
When Is A Semiclassical Approximation Self-consistent?
Suzhou Huang
Jun 03 1996 hep-ph hep-lat nucl-th arXiv:hep-ph/9605461v1

@misc{hep-ph/9605461, author = {Suzhou Huang}, title = {{W}hen {I}s {A} {S}emiclassical {A}pproximation {S}elf-consistent?}, year = {1996}, eprint = {hep-ph/9605461}, howpublished = {Phys.Rev. D54 (1996) 5280-5289}, doi = {10.1103/PhysRevD.54.5280}, note = {arXiv:hep-ph/9605461v1} }
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A general condition for the self-consistency of a semiclassical approximation to a given system is suggested. It is based on the eigenvalue distribution of the relevant Hessian evaluated at the streamline configurations (configurations that almost satisfy the classical equations of motion). The semiclassical approximation is consistent when there exists a gap that separates small and large eigenvalues and the spreading among the small eigenvalues is much smaller than the gap. The idea is illustrated in the case of the double-well potential problem in quantum mechanics. The feasibility of the present idea to test instanton models of QCD vacuum is also briefly discussed.
A Study of the $\pi B \to Y K $ reactions for Kaon Production in Heavy Ion Collisions
K. Tsushima, S.W. Huang, Amand Faessler
Feb 06 1996 nucl-th hep-ph arXiv:nucl-th/9602005v2

@misc{nucl-th/9602005, author = {K.~Tsushima and S.W.~Huang and Amand Faessler}, title = {{A} {S}tudy of the $\pi {B} \to {Y} {K} $ reactions for {K}aon {P}roduction in {H}eavy {I}on {C}ollisions}, year = {1996}, eprint = {nucl-th/9602005}, howpublished = {Austral.J.Phys.50:35-43,1997}, note = {arXiv:nucl-th/9602005v2} }
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Parametrizations of total cross sections sufficient for all channels of the $\pi B \rightarrow Y K$ reactions are completed using a resonance model. As well as discussing the $\pi N \rightarrow \Lambda K$ reactions, which were not presented in our previous publications, we present the differential cross section for $\pi N \rightarrow \Lambda K$. This report also aims at presenting supplementary discussions to our previous work.
The Dimensionally Reduced Effective Theory for Quarks in High Temperature QCD
Suzhou Huang, Marcello Lissia
Nov 22 1995 hep-ph hep-lat nucl-th arXiv:hep-ph/9511383v2

@misc{hep-ph/9511383, author = {Suzhou Huang and Marcello Lissia}, title = {{T}he {D}imensionally {R}educed {E}ffective {T}heory for {Q}uarks in {H}igh {T}emperature {QCD}}, year = {1995}, eprint = {hep-ph/9511383}, howpublished = {Nucl.Phys.B480:623-654,1996}, doi = {10.1016/S0550-3213(96)00463-4}, note = {arXiv:hep-ph/9511383v2} }
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We show that QCD undergoes dimensional reduction at high temperatures also in the quark sector. In the kinematic region relevant to screening physics, where the lowest Matsubara modes are close to their ``mass-shells'', all static Green's functions involving both quarks and gluons, are reproducible in the high-$T$ limit by a renormalizable three dimensional Lagrangian up to order $\tilde{g}^2(T)\sim 1/ln T$. This three dimensional theory only contains explicitly the lightest bosonic and fermionic Matsubara modes, while the heavier modes correct the tree-level couplings and generate extra local vertices. We also find that the quark degrees of freedom that have been retained in the reduced theory are nonrelativistic in the high-$T$ limit. We then improve our result to order $\tilde{g}^4(T)$ through an explicit nonrelativistic expansion, in the spirit of the heavy quark effective theory. This effective theory is relevant for studying QCD screening phenomena with observables made from quarks, e.g. mesonic and baryonic currents, already at temperatures not much higher than the chiral transition temperature $T_c$.
Contrasting Real-time Dynamics with Screening Phenomena at Finite Temperature
Suzhou Huang, Marcello Lissia
Sep 25 1995 hep-ph hep-lat hep-th nucl-th arXiv:hep-ph/9509360v3

@misc{hep-ph/9509360, author = {Suzhou Huang and Marcello Lissia}, title = {{C}ontrasting {R}eal-time {D}ynamics with {S}creening {P}henomena at {F}inite {T}emperature}, year = {1995}, eprint = {hep-ph/9509360}, howpublished = {Phys.Rev.D53:7270-7285,1996}, doi = {10.1103/PhysRevD.53.7270}, note = {arXiv:hep-ph/9509360v3} }
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We discuss the interpretation of Euclidean correlation functions at finite temperature ($T$) and their relationship with the corresponding real-time Green's functions. The soluble 2+1 dimensional Gross-Neveu model in the large-$N$ limit is used throughout as a working example. First, the real-time bound state, identified as an elementary excitation at finite $T$, is solved. The bound state mass, the dispersion relation at low momenta, the coupling constant and decay constant are calculated. To characterize the structure of the bound state the on-shell form factor is carefully introduced and calculated. Then we examine the corresponding screening state and contrast the screening mass, coupling constant, decay constant and the screening Bethe-Salpeter amplitude with the real-time quantities. We find that, although they can be used as qualitative indicators in the low-$T$ regime, the screening states at finite $T$ in general do not reflect the properties of the corresponding real-time bound states. Besides, other relevant issues, such as the subtlety of the real-time manifestation of conservation laws due to some internal symmetries at $T\ne 0$, the temperature dependence of the pseudoscalar spectral function and its sum rule, and the high-$T$ limit of the screening state and its implications to the dimensional reduction, are also discussed in detail.
Heavy Ion Collisions and the Density Dependence of the Local Mean Field
T. Kubo, E. Lehmann, Amand Faessler, Rajeev K. Puri, N. Ohtsuka, K. Tsushima, J. Zipprich, S.W. Huang
Aug 04 1995 nucl-th arXiv:nucl-th/9508007v1

@misc{nucl-th/9508007, author = {T.~Kubo and E.~Lehmann and Amand Faessler and Rajeev K.~Puri and N.~Ohtsuka and K.~Tsushima and J.~Zipprich and S.W.~Huang}, title = {{H}eavy {I}on {C}ollisions and the {D}ensity {D}ependence of the {L}ocal {M}ean {F}ield}, year = {1995}, eprint = {nucl-th/9508007}, note = {arXiv:nucl-th/9508007v1} }
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We study the effect of the density dependence of the scalar and the vector part of the nucleonic self-energy in Relativistic Quantum Molecular Dynamics (RQMD) on observables like the transversal flow and the rapidity distribution. The stability of nuclei in RQMD is greatly improved if the density dependence is included in the self-energies compared to a calculation assuming always saturation density of nuclear matter. Different approaches are studied: The main results are calculated with self-energies extracted from a Dirac-Brückner-Hartree-Fock G-matrix of a one boson exchange model, i.e. the Bonn potential. These results are compared with those obtained by a generalization of static Skyrme force, with calculations in the simple linear Walecka model and results of the Brückner-Hartree-Fock G-matrix of the Reid soft core potential. The transversal flow is very sensitive to these different approaches. A comparison with the data is given.
DIMENSIONAL REDUCTION AT HIGH TEMPERATURE FOR FERMIONS
Suzhou Huang, Marcello Lissia
Mar 14 1995 hep-ph hep-lat nucl-th arXiv:hep-ph/9503304v1

@misc{hep-ph/9503304, author = {Suzhou Huang and Marcello Lissia}, title = {{DIMENSIONAL} {REDUCTION} {AT} {HIGH} {TEMPERATURE} {FOR} {FERMIONS}}, year = {1995}, eprint = {hep-ph/9503304}, howpublished = {Phys.Lett.B349:484-490,1995}, doi = {10.1016/0370-2693(95)00296-W}, note = {arXiv:hep-ph/9503304v1} }
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The concept of dimensional reduction in the high temperature regime is generalized to static Green's functions of composite operators that contain fermionic fields. The recognition of a natural kinematic region where the lowest Matsubara modes are close to their mass-shell, and the ultraviolet behavior of the running coupling constant of the original theory are crucial for providing the necessary scale hierarchy. The general strategy is illustrated in the asymptotically-free Gross-Neveu model in 1+1 dimensions, where we verify that dimensional reduction occurs to the leading order in $g^2(T)$. We also find, in the same model, that the scale parameter characterizing the dependence on temperature of the coupling constant in the reduced theory, $\Lambda_T$, is considerably smaller than $\Lambda_{\bar{\text{MS}}}$. Implications of our results for QCD are also discussed.
Sensitivity of the nuclear equation of state towards relativistic effects
Rajeev K. Puri, E. Lehmann, Amand Faessler, S.W. Huang
Feb 06 1995 nucl-th arXiv:nucl-th/9502009v1

@misc{nucl-th/9502009, author = {Rajeev K.~Puri and E.~Lehmann and Amand Faessler and S.W.~Huang}, title = {{S}ensitivity of the nuclear equation of state towards relativistic effects}, year = {1995}, eprint = {nucl-th/9502009}, howpublished = {J.Phys. G21 (1995) 583-588}, doi = {10.1088/0954-3899/21/4/010}, note = {arXiv:nucl-th/9502009v1} }
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We analyze relativistic effects in transverse momentum using Quantum Molecular Dynamics [QMD] and its covariant extension Relativistic Quantum Molecular Dynamics [RQMD]. The strength of the relativistic effects is found to increase with the bombarding energy and with an averaged impact parameter. The variation in the intensity of the relativistic effects with variation in the mass of the colliding nuclei is not systematic. Furthermore, the hard EOS is affected drastically by the relativistic effects whereas the soft EOS is affected less. Our analysis shows that up to the bombarding energy of 1 GeV/nucl., the influence of relativistic effects is small. Whereas at higher energies, relativistic effects become naturally very important.
Study of non-equilibrium effects and thermal properties of heavy ion collisions using a covariant approach
Rajeev K. Puri, E. Lehmann, Amand Faessler, S.W. Huang
Feb 06 1995 nucl-th arXiv:nucl-th/9502010v1

@misc{nucl-th/9502010, author = {Rajeev K.~Puri and E.~Lehmann and Amand Faessler and S.W.~Huang}, title = {{S}tudy of non-equilibrium effects and thermal properties of heavy ion collisions using a covariant approach}, year = {1995}, eprint = {nucl-th/9502010}, howpublished = {J.Phys. G20 (1994) 1817-1828}, doi = {10.1088/0954-3899/20/11/010}, note = {arXiv:nucl-th/9502010v1} }
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Non-equilibrium effects are studied using a full Lorentz-invariant formalism. Our analysis shows that in reactions considered here, no global or local equilibrium is reached. The heavier masses are found to be equilibrated more than the lighter systems. The local temperature is extracted using hot Thomas Fermi formalism generalized for the case of two interpenetrating pieces of nuclear matter. The temperature is found to vary linearly with bombarding energy and impact parameter whereas it is nearly independent of the mass of the colliding nuclei. This indicates that the study of temperature with medium size nuclei is also reliable. The maximum temperatures obtained in our approach are in a nice agreement with earlier calculations of other approaches. A simple parametrization of maximal temperature as a function of the bombarding energy is also given.
Consequences of a covariant Description of Heavy Ion Reactions at intermediate Energies
E. Lehmann, Rajeev K. Puri, Amand Faessler, G. Batko, S.W. Huang
Feb 06 1995 nucl-th arXiv:nucl-th/9502011v1

@misc{nucl-th/9502011, author = {E.~Lehmann and Rajeev K.~Puri and Amand Faessler and G.~Batko and S.W.~Huang}, title = {{C}onsequences of a covariant {D}escription of {H}eavy {I}on {R}eactions at intermediate {E}nergies}, year = {1995}, eprint = {nucl-th/9502011}, howpublished = {Phys.Rev.C51:2113-2124,1995}, doi = {10.1103/PhysRevC.51.2113}, note = {arXiv:nucl-th/9502011v1} }
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Heavy ion collisions at intermediate energies are studied by using a new RQMD code, which is a covariant generalization of the QMD approach. We show that this new implementation is able to produce the same results in the nonrelativistic limit (i.e. 50MeV/nucl.) as the non-covariant QMD. Such a comparison is not available in the literature. At higher energies (i.e. 1.5 GeV/nucl. and 2 GeV/nucl.) RQMD and QMD give different results in respect to the time evolution of the phase space, for example for the directed transverse flow. These differences show that consequences of a covariant description of heavy ion reactions within the framework of RQMD are existing even at intermediate energies.
Relativistic Effects in Heavy-Ion Collisions at SIS Energies
Rajeev K. Puri, E. Lehmann, Amand Faessler, S.W. Huang
Feb 06 1995 nucl-th arXiv:nucl-th/9502012v1

@misc{nucl-th/9502012, author = {Rajeev K.~Puri and E.~Lehmann and Amand Faessler and S.W.~Huang}, title = {{R}elativistic {E}ffects in {H}eavy-{I}on {C}ollisions at {SIS} {E}nergies}, year = {1995}, eprint = {nucl-th/9502012}, note = {arXiv:nucl-th/9502012v1} }
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The covariant and non-covariant Quantum Molecular Dynamics models are applied to investigate possible relativistic effects in heavy ion collisions at SIS energies. These relativistic effects which arise due to the full covariant treatment of the dynamics are studied at bombarding energies E$_{lab.}$ = 50, 250, 500, 750, 1000, 1250, 1500, 1750 and 2000 MeV/nucl.. A wide range of the impact parameter from b = 0 fm to b = 10 fm is also considered. In the present study, five systems $^{12}$C-$^{12}$C, $^{16}$O-$^{16}$O, $^{20}$Ne-$^{20}$Ne, $^{28}$Si-$^{28}$Si and $^{40}$Ca-$^{40}$Ca are investigated. The full covariant treatment at low energies shows quite good agreement with the corresponding non-covariant approach whereas at higher energies it shows less stopping and hence less thermal equilibrium as compared to the non-covariant approach. The collisions dynamics is less affected. The density using RQMD rises and drops faster than with QMD. The relativistic effects show some influence on the resonance matter production. Overall, the relativistic effects at SIS energies ($\leq$ 2000 MeV/nucl.) are less significant.
A Resonance Model for pi N -> Y K and pi Delta -> Y K Reactions for Kaon Production in Heavy Ion Collisions
S. W. Huang, K. Tsushima, A Faessler, E. Lehmann, R. K. Puri
Dec 08 1994 nucl-th arXiv:nucl-th/9412011v1

@misc{nucl-th/9412011, author = {S.~W.~Huang and K.~Tsushima and A Faessler and E.~Lehmann and R.~K.~Puri}, title = {{A} {R}esonance {M}odel for pi {N} -> {Y} {K} and pi {D}elta -> {Y} {K} {R}eactions for {K}aon {P}roduction in {H}eavy {I}on {C}ollisions}, year = {1994}, eprint = {nucl-th/9412011}, note = {arXiv:nucl-th/9412011v1} }
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In a resonance model the reactions pi N -> Y K and pi Delta -> Y K are studied. For the reactions pi N -> Lambda K and pi Delta -> Lambda K, the resonances N(1650)(J^P=1/2^-), N(1710)(1/2^+) and N(1720)(3/2^+) are included as intermediate states. For the reactions pi N -> Sigma K, the resonances N(1710)(1/2^+), N(1720)(3/2^+) and Delta(1920)(3/2^+) are considered, while for the pi Delta -> Sigma K reactions the intermediate resonances are N(1710)(1/2^+) and N(1720)(3/2^+). Besides these resonances in the s-channel, the t-channel K^*(892) exchanges are also taken into account as a smooth background. The relevant coupling constants for the meson-baryon vertices are obtained (except for Delta(1920)) from the experimental decay branching ratios of the relevant resonances. All isospin channels of the pi N -> Y K and pi Delta -> Y K cross sections are calculated. By comparing the calculated results with the available experimental data, we find that the total cross sections of the pi N -> Y K reactions can be explained by the resonance model. The pi Delta -> Y K cross sections, for which no experimental data are available, are predicted theoretically. Parametrizations of the calculated total cross sections for all different isospin channels are given for the use of kaon productions in heavy ion collisions. The differential cross sections are also studied.
The Relevant Scale Parameter in the High Temperature Phase of QCD
Suzhou Huang, Marcello Lissia
Nov 15 1994 hep-ph hep-lat nucl-th arXiv:hep-ph/9411293v1

@misc{hep-ph/9411293, author = {Suzhou Huang and Marcello Lissia}, title = {{T}he {R}elevant {S}cale {P}arameter in the {H}igh {T}emperature {P}hase of {QCD}}, year = {1994}, eprint = {hep-ph/9411293}, howpublished = {Nucl.Phys.B438:54-66,1995}, doi = {10.1016/0550-3213(95)00007-F}, note = {arXiv:hep-ph/9411293v1} }
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We introduce the running coupling constant of QCD in the high temperature phase, $\tilde{g}^2(T)$, through a renormalization scheme where the dimensional reduction is optimal at the one-loop level. We then calculate the relevant scale parameter, $\Lambda_T$, which characterizes the running of $\tilde{g}^2(T)$ with $T$, using the background field method in the static sector. It is found that $\Lambda_T/\Lambda_{\overline{\text{MS}}} =e^{(\gamma_E+1/22)}/(4\pi)\approx 0.148$. We further verify that the coupling $\tilde{g}^2(T)$ is also optimal for lattice perturbative calculations. Our result naturally explains why the high temperature limit of QCD sets in at temperatures as low as a few times the critical temperature. In addition, our $\Lambda_T$ agrees remarkably well with the scale parameter determined from the lattice measurement of the spatial string tension of the SU(2) gauge theory at high $T$.
Dimensional Reduction for Fermions
S. Huang, M. Lissia
Aug 23 1994 hep-ph hep-lat nucl-th arXiv:hep-ph/9408347v1

@misc{hep-ph/9408347, author = {S.~Huang and M.~Lissia}, title = {{D}imensional {R}eduction for {F}ermions}, year = {1994}, eprint = {hep-ph/9408347}, note = {arXiv:hep-ph/9408347v1} }
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We generalize the concept of dimensional reduction to operators involving fermion fields in high temperature field theories. It is found that the ultraviolet behavior of the running coupling constant plays a crucial role. The general concept is illustrated explicitly in the Gross-Neveu model.
Exact Sum Rules at Finite Temperature and Chemical Potential and their Application to QCD
S. Huang, M. Lissia
Aug 23 1994 hep-ph hep-lat nucl-th arXiv:hep-ph/9408348v1

@misc{hep-ph/9408348, author = {S.~Huang and M.~Lissia}, title = {{E}xact {S}um {R}ules at {F}inite {T}emperature and {C}hemical {P}otential and their {A}pplication to {QCD}}, year = {1994}, eprint = {hep-ph/9408348}, note = {arXiv:hep-ph/9408348v1} }
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Within the framework of the operator product expansion (OPE) and the renormalization group equation (RGE), we show that the temperature and chemical potential dependence of the zeroth moment of a spectral function (SF) in an asymptotically free theory is completely determined by the one-loop structure of the theory. This exact result constrains the qualitative shape of SF's, and implies striking phenomenological effects near phase transitions.
Resonance Model of $\pi \Delta \rightarrow Y K$ for Kaon Production in Heavy Ion Collisions
K. Tsushima, S.W. Huang, Amand Faessler
Jul 13 1994 nucl-th arXiv:nucl-th/9407020v3

@misc{nucl-th/9407020, author = {K.~Tsushima and S.W.~Huang and Amand Faessler}, title = {{R}esonance {M}odel of $\pi \{D}elta \rightarrow {Y} {K}$ for {K}aon {P}roduction in {H}eavy {I}on {C}ollisions}, year = {1994}, eprint = {nucl-th/9407020}, howpublished = {J.Phys. G21 (1995) 33-42}, doi = {10.1088/0954-3899/21/1/005}, note = {arXiv:nucl-th/9407020v3} }
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The elementary production cross sections $\pi \Delta \rightarrow Y K$ $(Y=\Sigma,\,\, \Lambda)$ and $\pi N \rightarrow Y K$ are needed to describe kaon production in heavy ion collisions. The $\pi N \rightarrow Y K$ reactions were studied previously by a resonance model. The model can explain the experimental data quite well \citetsu. In this article, the total cross sections $\pi \Delta \rightarrow Y K$ at intermediate energies (from the kaon production threshold to3 GeV of $\pi \Delta$ center-of-mass energy) are calculated for the first time using the same resonance model. The resonances, $N(1710)\,I(J^P) = \frac{1}{2}(\frac{1}{2}^+)$ and $N(1720)\, \frac{1}{2} (\frac{3}{2}^+)$ for the $\pi \Delta \rightarrow \Sigma K$ reactions, and $N(1650)\, \frac{1}{2} (\frac{1}{2}^-)$, $N(1710)\, \frac{1}{2} (\frac{1}{2}^+)$ and $N(1720)\, \frac{1}{2} (\frac{3}{2}^+)$ for the $\pi \Delta \rightarrow \Lambda K$ reactions are taken into account coherently as the intermediate states in the calculations. Also t-channel $K^*(892) \frac{1}{2}(1^-)$ vector meson exchange is included. The results show that $K^*(892)$ exchange is neglegible for the $\pi \Delta \rightarrow \Sigma K$ reactions, whereas this meson does not contribute to the $\pi \Delta \rightarrow \Lambda K$ reactions. Furthemore, the $\pi \Delta \rightarrow Y K$ contributions to kaon production in heavy ion collisions are not only non-neglegible but also very different from the $\pi N \rightarrow Y K$ reactions. An argument valid for $\pi N \rightarrow Y K$ cannot be extended to $\pi \Delta \rightarrow Y K$ reactions. Therefore, cross sections for $\pi \Delta \rightarrow Y K$ including correctly the different isospins must be
The Role of the $\Delta(1920)$ Resonance for Kaon Production in Heavy Ion Collisions
K. Tsushima, S.W. Huang, Amand Faessler
Jul 13 1994 nucl-th arXiv:nucl-th/9407021v3

@misc{nucl-th/9407021, author = {K.~Tsushima and S.W.~Huang and Amand Faessler}, title = {{T}he {R}ole of the $\{D}elta(1920)$ {R}esonance for {K}aon {P}roduction in {H}eavy {I}on {C}ollisions}, year = {1994}, eprint = {nucl-th/9407021}, howpublished = {Phys.Lett. B337 (1994) 245-253}, doi = {10.1016/0370-2693(94)90971-7}, note = {arXiv:nucl-th/9407021v3} }
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The long mean free path of $K^+$ mesons in nuclear matter makes this particle a suitable messenger for the dynamics of nucleus-nucleus reactions at intermediate energies (100 MeV to 3 GeV per nucleon). A prerequisite for this is the knowledge of the elementary production cross sections $\pi N \rightarrow \Sigma K$. Here these cross sections are studied for the first time with the explicite inclusion of the relevant baryon resonances up to 2 GeV as intermediate states. The baryon resonances -- $N(1710)\, I(J^P) = \frac{1}{2} (\frac{1}{2}^+),\, N(1720)\, \frac{1}{2} (\frac{3}{2}^+)$ and $\Delta(1920)\, \frac{3}{2} (\frac{3}{2}^+)\,$ -- are taken into account coherently in the calculations of the $\pi N \rightarrow \Sigma K$ process. (We refer to this model as the `resonance model'.) Also $K^*(892)\frac{1}{2} (1^-)$ vector meson exchange is included. It is shown that the total cross sections for different channels of the $\pi N \rightarrow \Sigma k$ reactions, i.e. $\pi^+ p \rightarrow \Sigma^+ K^+$, $\pi^- p \rightarrow \Sigma^- K^+$, $\pi^+ n \rightarrow \Sigma^0 K^+$ ($\pi^- p \rightarrow \Sigma^- K^+$) and $\pi^0 p \rightarrow \Sigma^0 K^+$ differ not only by absolute values but also by their energy dependence. This shape differences are due to the mixture of the isospin $I = 3/2$ $\Delta(1920)$ with isospin $I = 1/2$ nucleon resonances. However, this $I = 3/2$ resonance does not give a contribution to the $\pi N \rightarrow \Lambda K$ reactions. So the shapes of the total cross sections $\pi N \rightarrow \Lambda K$ for different isospin projections are the same. In spite of this, such cross sections averaged over different isospin projections in the same multiplet
Nucleon Solution of the Faddeev Equation in the Nambu-Jona-Lasinio Model
Suzhou Huang, John Tjon
Aug 31 1993 hep-ph nucl-th arXiv:hep-ph/9308362v1

@misc{hep-ph/9308362, author = {Suzhou Huang and John Tjon}, title = {{N}ucleon {S}olution of the {F}addeev {E}quation in the {N}ambu-{J}ona-{L}asinio {M}odel}, year = {1993}, eprint = {hep-ph/9308362}, howpublished = {Phys.Rev.C49:1702-1708,1994}, doi = {10.1103/PhysRevC.49.1702}, note = {arXiv:hep-ph/9308362v1} }
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Given the phenomenological success of the Nambu-Jona-Lasinio model in describing the meson physics in the low energy limit, it is tempting to find the fully relativistically structured nucleon solution in the same model under the similar approximation employed in the mesonic sector. To achieve this goal we need to solve a relativistic Faddeev equation. The factorizability of the two-body T-matrix reduces the three-body Faddeev equation to a tractable two-body Bethe-Salpeter equation. The reduced equation is then solved numerically. Our result indicates that the nucleon consists of three loosely bound constituent quarks.