Diphoton excess in phenomenological spin-2 resonance scenarios

TL;DR

This paper explores a spin-2 resonance model to explain the 750 GeV diphoton excess observed at the LHC, analyzing parameter space and potential for distinguishing couplings through kinematic distributions.

Contribution

It introduces a phenomenological spin-2 resonance framework with independent couplings to gluons, quarks, and photons, and identifies viable parameter regions consistent with experimental constraints.

Findings

A parameter space where the excess is explained without conflicting with dijet constraints.

Kinematic distributions can help determine the resonance's couplings to gluons and quarks.

The model provides a plausible explanation for the observed diphoton excess.

Abstract

We provide a possible explanation of a 750 GeV diphoton excess recently reported by both the ATLAS and CMS collaborations in the context of phenomenological spin-2 resonance scenarios, where the independent effective couplings of the resonance with gluons, quarks and photons are considered. We find a parameter region where the excess can be accounted for without conflicting with dijet constraints. We also show that the kinematical distributions might help to determine the couplings to gluons and quarks.