Abstract
We consider the diphoton excess observed by ATLAS and CMS using the most up-to-date data and estimate the preferred enhancement in the production rate between 8 TeV and 13 TeV. Within the framework of effective field theory (EFT), we then show that for both spin-0 and spin-2 Standard Model (SM) gauge-singlet resonances, two of the three processes S → ZZ, S → Zγ, and S → W W must occur with a non-zero rate. Moreover, we demonstrate that these branching ratios are highly correlated in the EFT. Couplings of S to additional SM states may be constrained and differentiated by comparing the S production rates with and without the vector-boson fusion (VBF) cuts. We find that for a given VBF to inclusive production ratio there is maximum rate of S to gauge bosons, \( b\overline{b} \), and lighter quark anti-quark pairs. Simultaneous measurements of the width and the VBF ratio may be able to point towards the existence of hidden decays.
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ATLAS collaboration, Search for resonances decaying to photon pairs in 3.2 fb−1 of pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, ATLAS-CONF-2015-081, CERN, Geneva Switzerland (2015).
ATLAS collaboration, Diphoton searches in ATLAS, presented at the 51st Rencontres de Moriond EW 2016, ATL-PHYS-PROC-2016-046, La Thuile Italy (2016).
CMS collaboration, Search for new physics in high mass diphoton events in proton-proton collisions at \( \sqrt{s}=13 \) TeV, CMS-PAS-EXO-15-004, CERN, Geneva Switzerland (2015).
CMS collaboration, Search for high mass diphoton resonances at CMS, presented at the 51st Rencontres de Moriond EW 2016, La Thuile Italy (2016).
CMS collaboration, Search for new physics in high mass diphoton events in 3.3 fb−1 of proton-proton collisions at \( \sqrt{s}=13 \) TeV and combined interpretation of searches at 8 TeV and 13 TeV, CMS-PAS-EXO-16-018, CERN, Geneva Switzerland (2016).
R. Franceschini et al., What is the γγ resonance at 750 GeV?, JHEP 03 (2016) 144 [arXiv:1512.04933] [INSPIRE].
S. Knapen, T. Melia, M. Papucci and K. Zurek, Rays of light from the LHC, Phys. Rev. D 93 (2016) 075020 [arXiv:1512.04928] [INSPIRE].
J. Liu, X.-P. Wang and W. Xue, LHC diphoton excess from colorful resonances, arXiv:1512.07885 [INSPIRE].
F.P. Huang, C.S. Li, Z.L. Liu and Y. Wang, 750 GeV diphoton excess from cascade decay, arXiv:1512.06732 [INSPIRE].
M. Low, A. Tesi and L.-T. Wang, A pseudoscalar decaying to photon pairs in the early LHC Run 2 data, JHEP 03 (2016) 108 [arXiv:1512.05328] [INSPIRE].
I. Low and J. Lykken, Implications of gauge invariance on a heavy diphoton resonance, arXiv:1512.09089 [INSPIRE].
A. Alves, A.G. Dias and K. Sinha, The 750 GeV S-cion: where else should we look for it?, Phys. Lett. B 757 (2016) 39 [arXiv:1512.06091] [INSPIRE].
W. Altmannshofer, J. Galloway, S. Gori, A.L. Kagan, A. Martin and J. Zupan, 750 GeV diphoton excess, Phys. Rev. D 93 (2016) 095015 [arXiv:1512.07616] [INSPIRE].
S. Di Chiara, L. Marzola and M. Raidal, First interpretation of the 750 GeV diphoton resonance at the LHC, Phys. Rev. D 93 (2016) 095018 [arXiv:1512.04939] [INSPIRE].
J. Ellis, S.A.R. Ellis, J. Quevillon, V. Sanz and T. You, On the interpretation of a possible ∼ 750 GeV particle decaying into γγ, JHEP 03 (2016) 176 [arXiv:1512.05327] [INSPIRE].
C. Petersson and R. Torre, 750 GeV diphoton excess from the goldstino superpartner, Phys. Rev. Lett. 116 (2016) 151804 [arXiv:1512.05333] [INSPIRE].
Q.-H. Cao, Y. Liu, K.-P. Xie, B. Yan and D.-M. Zhang, A boost test of anomalous diphoton resonance at the LHC, arXiv:1512.05542 [INSPIRE].
A. Kobakhidze, F. Wang, L. Wu, J.M. Yang and M. Zhang, 750 GeV diphoton resonance in a top and bottom seesaw model, Phys. Lett. B 757 (2016) 92 [arXiv:1512.05585] [INSPIRE].
S. Fichet, G. von Gersdorff and C. Royon, Scattering light by light at 750 GeV at the LHC, Phys. Rev. D 93 (2016) 075031 [arXiv:1512.05751] [INSPIRE].
H. Han, S. Wang and S. Zheng, Scalar explanation of diphoton excess at LHC, Nucl. Phys. B 907 (2016) 180 [arXiv:1512.06562] [INSPIRE].
T.-F. Feng, X.-Q. Li, H.-B. Zhang and S.-M. Zhao, The LHC 750 GeV diphoton excess in supersymmetry with gauged baryon and lepton numbers, arXiv:1512.06696 [INSPIRE].
J.J. Heckman, 750 GeV diphotons from a D3-brane, Nucl. Phys. B 906 (2016) 231 [arXiv:1512.06773] [INSPIRE].
L. Berthier, J.M. Cline, W. Shepherd and M. Trott, Effective interpretations of a diphoton excess, JHEP 04 (2016) 084 [arXiv:1512.06799] [INSPIRE].
N. Craig, P. Draper, C. Kilic and S. Thomas, Shedding light on diphoton resonances, Phys. Rev. D 93 (2016) 115023 [arXiv:1512.07733] [INSPIRE].
P.S.B. Dev, R.N. Mohapatra and Y. Zhang, Quark seesaw, vectorlike fermions and diphoton excess, JHEP 02 (2016) 186 [arXiv:1512.08507] [INSPIRE].
D. Stolarski and R. Vega-Morales, Probing a virtual diphoton excess, Phys. Rev. D 93 (2016) 055008 [arXiv:1601.02004] [INSPIRE].
S. Fichet, G. von Gersdorff and C. Royon, Measuring the diphoton coupling of a 750 GeV resonance, Phys. Rev. Lett. 116 (2016) 231801 [arXiv:1601.01712] [INSPIRE].
D. Buttazzo, A. Greljo and D. Marzocca, Knocking on new physics’ door with a scalar resonance, Eur. Phys. J. C 76 (2016) 116 [arXiv:1512.04929] [INSPIRE].
R.S. Gupta, S. Jäger, Y. Kats, G. Perez and E. Stamou, Interpreting a 750 GeV diphoton resonance, arXiv:1512.05332 [INSPIRE].
P. Agrawal, J. Fan, B. Heidenreich, M. Reece and M. Strassler, Experimental considerations motivated by the diphoton excess at the LHC, JHEP 06 (2016) 082 [arXiv:1512.05775] [INSPIRE].
NNPDF collaboration, R.D. Ball et al., Parton distributions for the LHC Run II, JHEP 04 (2015) 040 [arXiv:1410.8849] [INSPIRE].
J. Alwall et al., The automated computation of tree-level and next-to-leading order differential cross sections and their matching to parton shower simulations, JHEP 07 (2014) 079 [arXiv:1405.0301] [INSPIRE].
C. Csáki, J. Hubisz, S. Lombardo and J. Terning, Gluon versus photon production of a 750 GeV diphoton resonance, Phys. Rev. D 93 (2016) 095020 [arXiv:1601.00638] [INSPIRE].
L.A. Harland-Lang, V.A. Khoze and M.G. Ryskin, The photon PDF in events with rapidity gaps, Eur. Phys. J. C 76 (2016) 255 [arXiv:1601.03772] [INSPIRE].
M. Ababekri, S. Dulat, J. Isaacson, C. Schmidt and C.P. Yuan, Implication of CMS data on photon PDFs, arXiv:1603.04874 [INSPIRE].
L.A. Harland-Lang, V.A. Khoze and M.G. Ryskin, The production of a diphoton resonance via photon-photon fusion, JHEP 03 (2016) 182 [arXiv:1601.07187] [INSPIRE].
ATLAS collaboration, Search for an additional, heavy Higgs boson in the H → ZZ decay channel at \( \sqrt{s}=8 \) TeV in pp collision data with the ATLAS detector, Eur. Phys. J. C 76 (2016) 45 [arXiv:1507.05930] [INSPIRE].
ATLAS collaboration, A search for resonant Higgs-pair production in the \( b\overline{b}b\overline{b} \) final state in pp collisions at \( \sqrt{s}=8 \) TeV, ATLAS-CONF-2014-005, CERN, Geneva Switzerland (2014).
CMS collaboration, Search for a Higgs boson in the mass range from 145 to 1000 GeV decaying to a pair of W or Z bosons, JHEP 10 (2015) 144 [arXiv:1504.00936] [INSPIRE].
ATLAS collaboration, Search for a high-mass Higgs boson decaying to a W boson pair in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, JHEP 01 (2016) 032 [arXiv:1509.00389] [INSPIRE].
CMS collaboration, Search for a heavy scalar boson decaying into a pair of Z bosons in the 2ℓ2ν final state, CMS-PAS-HIG-16-001, CERN, Geneva Switzerland (2016).
ATLAS collaboration, Search for heavy resonances decaying to a Z boson and a photon in pp collisions at \( \sqrt{s}=13 \) TeV with the ATLAS detector, ATLAS-CONF-2016-010, CERN, Geneva Switzerland (2016).
ATLAS collaboration, Search for new resonances in W γ and Zγ final states in pp collisions at \( \sqrt{s}=8 \) TeV with the ATLAS detector, Phys. Lett. B 738 (2014) 428 [arXiv:1407.8150] [INSPIRE].
A. Falkowski, O. Slone and T. Volansky, Phenomenology of a 750 GeV singlet, JHEP 02 (2016) 152 [arXiv:1512.05777] [INSPIRE].
F. Goertz, J.F. Kamenik, A. Katz and M. Nardecchia, Indirect constraints on the scalar di-photon resonance at the LHC, JHEP 05 (2016) 187 [arXiv:1512.08500] [INSPIRE].
Particle Data Group collaboration, K.A. Olive et al., Review of particle physics, Chin. Phys. C 38 (2014) 090001 [INSPIRE].
K. Yagyu, Higgs sectors with exotic scalar fields, in 1st Toyama International Workshop on Higgs as a Probe of New Physics 2013 (HPNP2013), Toyama Japan February 13-16 2013 [arXiv:1304.6338] [INSPIRE].
I.L. Buchbinder, D.M. Gitman, V.A. Krykhtin and V.D. Pershin, Equations of motion for massive spin-2 field coupled to gravity, Nucl. Phys. B 584 (2000) 615 [hep-th/9910188] [INSPIRE].
A. Angelescu, A. Djouadi and G. Moreau, Scenarii for interpretations of the LHC diphoton excess: two Higgs doublets and vector-like quarks and leptons, Phys. Lett. B 756 (2016) 126 [arXiv:1512.04921] [INSPIRE].
D. Aloni, K. Blum, A. Dery, A. Efrati and Y. Nir, On a possible large width 750 GeV diphoton resonance at ATLAS and CMS, arXiv:1512.05778 [INSPIRE].
L.A. Harland-Lang, A.D. Martin, P. Motylinski and R.S. Thorne, Parton distributions in the LHC era: MMHT 2014 PDFs, Eur. Phys. J. C 75 (2015) 204 [arXiv:1412.3989] [INSPIRE].
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Kamenik, J.F., Safdi, B.R., Soreq, Y. et al. Comments on the diphoton excess: critical reappraisal of effective field theory interpretations. J. High Energ. Phys. 2016, 42 (2016). https://doi.org/10.1007/JHEP07(2016)042
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DOI: https://doi.org/10.1007/JHEP07(2016)042