A pseudoscalar decaying to photon pairs in the early LHC Run 2 data

Low, Matthew; Tesi, Andrea; Wang, Lian -Tao

doi:10.1007/JHEP03(2016)108

Title: A pseudoscalar decaying to photon pairs in the early LHC Run 2 data

Journal Article · Wed Mar 16 00:00:00 EDT 2016 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP03(2016)108· OSTI ID:1326988

Low, Matthew ^[1]; Tesi, Andrea ^[2]; Wang, Lian -Tao ^[3]

Inst. for Advanced Study, Princeton, NJ (United States). School of Natural Sciences
Univ. of Chicago, IL (United States). Dept. of Physics. Enrico Fermi Inst.
Univ. of Chicago, IL (United States). Dept. of Physics. Kavli Inst. for Cosmological Physics. Enrico Fermi Inst.

In this paper we explore the possibility of a pseudoscalar resonance to account for the 750 GeV diphoton excess observed both at ATLAS and at CMS. We analyze the ingredients needed from the low energy perspective to obtain a sufficiently large diphoton rate to explain the signal while avoiding constraints from other channels. Additionally, we point out composite Higgs models in which one can naturally obtain a pseudoscalar at the 750 GeV mass scale and we estimate the pseudoscalar couplings to standard model particles that one would have in such models. A generic feature of models that can explain the excess is the presence of new particles in addition to the 750 GeV state. In conclusion, we note that due to the origin of the coupling of the resonance to photons, one expects to see comparable signals in the Zγ, ZZ, and W W channels.

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Research Organization:: Univ. of Chicago, IL (United States); Institute for Advanced Study, Princeton, NJ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: SC0013642

OSTI ID:: 1326988

Journal Information:: Journal of High Energy Physics (Online), Vol. 2016, Issue 3; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 88 works

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Cited By (3)

750 GeV diphoton resonance in a vector-like extension of Hill model at a 100 TeV hadron collider Liu, Ning; Wang, Wenyu; Zhang, Mengchao International Journal of Modern Physics A, Vol. 31, Issue 25 https://doi.org/10.1142/s0217751x16501451	journal	September 2016
Interpreting 750 GeV diphoton excess with R -parity violating supersymmetry Ding, Ran; Huang, Li; Li, Tianjun International Journal of Modern Physics A, Vol. 32, Issue 02n03 https://doi.org/10.1142/s0217751x17500142	journal	January 2017
Scattering Light by Light at 750 GeV at the LHC Fichet, Sylvain; von Gersdorff, Gero; Royon, Christophe arXiv https://doi.org/10.48550/arxiv.1512.05751	text	January 2015

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