Model-independent combination of diphoton constraints at 750 GeV
Jong Soo Kim, Krzysztof Rolbiecki, Roberto Ruiz de Austri
TL;DR
This paper combines diphoton search results at 8 and 13 TeV from the LHC in a model-independent way, analyzing potential 750 GeV resonances with spin-0 or spin-2, and discusses tensions in the excess signals.
Contribution
It provides a novel model-independent combination of diphoton constraints at different energies for a 750 GeV resonance, considering both spin hypotheses.
Findings
ATLAS excess slightly in tension with other measurements for spin-2 hypothesis
Combined results constrain possible resonance properties
Analysis applicable to future diphoton resonance searches
Abstract
Motivated by the recent diphoton excess reported by both the ATLAS and CMS collaborations, we provide a model-independent combination of diphoton results obtained at and 13 TeV at the LHC. We consider resonant s-channel production of a spin-0 and spin-2 particle with a mass of 750 GeV that subsequently decays to two photons. The size of the excess reported by ATLAS appears to be in slight tension with other measurements under the spin-2 particle hypothesis.
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