Abstract
We consider the immediate or near-term experimental opportunities offered by some scenarios that could explain the new diphoton excess at the LHC. If the excess is due to a new particle X s at 750 GeV, additional new particles are required, providing further signals. If connected with naturalness, the X s may be produced in top partner decays. Then a \( t^{\prime}\overline{t}^{\prime } \) signal, with t ′ → tX s and X s → gg dominantly, might be discovered by reinterpreting 13 TeV SUSY searches in multijet events with low MET and/or a lepton. If X s is a bound state of quirks, the signal events may be accompanied by an unusual number of soft tracks or soft jets. Other resonances including dilepton and photon+jet as well as dijet may lie at or above this mass, and signatures of hidden glueballs might also be observable. If the “photons” in the excess are actually long-lived particles decaying to photon pairs or to electron pairs, there are opportunities for detecting overlapping photons and/or unusual patterns of apparent photon-conversions in either X s or 125 GeV Higgs decays. There is also the possibility of events with a hard “photon” recoiling against a narrow isolated HCAL-only “jet”, which, after the jet’s energy is corrected for its electromagnetic origin, would show a peak at 750 GeV.
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Agrawal, P., Fan, J., Heidenreich, B. et al. Experimental considerations motivated by the diphoton excess at the LHC. J. High Energ. Phys. 2016, 82 (2016). https://doi.org/10.1007/JHEP06(2016)082
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DOI: https://doi.org/10.1007/JHEP06(2016)082