Diphoton Signals from Colorless Hidden Quarkonia
Sho Iwamoto, Gabriel Lee, Yael Shadmi, Robert Ziegler
TL;DR
This paper proposes that hidden quarkonium states from a new SU(N) gauge group can explain the 750 GeV diphoton excess, predicting various photon-related signals without multi-jet resonances.
Contribution
It introduces a novel hidden quarkonium model with modest hypercharge requirements to explain the diphoton excess observed at 750 GeV.
Findings
Explains the diphoton excess with hidden SU(N) quarkonia.
Predicts additional photon resonances and exotic decays.
No multi-jet resonances are expected in this scenario.
Abstract
We show that quarkonia-like states of a hidden SU(N) gauge group can account for the 750 GeV diphoton excess observed by ATLAS and CMS, even with constituents carrying standard model hypercharge only. The required hypercharge is modest, varying between about 1.3-1.6 for strong SU(N) coupling, to 2-3 for weak SU(N) coupling, for N=3, 4. This scenario predicts a variety of diphoton and multi-photon resonances, as well as photons from continuum pair production, and possibly exotic decays into standard model fermions, with no multi-jet resonances.
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