750 GeV Diphoton Resonance in Warped Geometries

TL;DR

This paper explores a warped extra-dimensional model with a spin-2 graviton that could explain the 750 GeV diphoton excess, consistent with existing constraints and relevant to TeV-scale physics.

Contribution

It demonstrates that a warped geometry with localized brane terms can produce a graviton compatible with the diphoton excess and existing experimental constraints.

Findings

A spin-2 graviton model explains the 750 GeV excess.

The IR-brane scale is around a few TeV.

The model remains flexible to satisfy precision measurement constraints.

Abstract

We examine the scenario of a warped extra dimension containing bulk SM fields in light of the observed diphoton excess at 750 GeV. We demonstrate that a spin-2 graviton whose action contains localized kinetic brane terms for both gravity and gauge fields is compatible with the excess, while being consistent with all other constraints. The graviton sector of this model contains a single free parameter, once the mass of the graviton is fixed. The scale of physics on the IR-brane is found to lie in the range of a $\sim$ few TeV, relevant to the gauge hierarchy. There remains significant flexibility in the coupled gauge/fermion KK sectors to address the strong constraints arising from precision measurements.