LHC constraints on hidden gravitons

TL;DR

This paper uses LHC data to set new constraints on hypothetical heavy spin-2 particles called hidden gravitons, which are predicted in various extensions of the Standard Model and gravity theories.

Contribution

It extends existing bounds on heavy hidden gravitons (mass > 1 GeV) by analyzing multiple LHC channels at 8 TeV, including WW, Drell-Yan, and diphoton processes.

Findings

New bounds on hidden graviton parameters for masses above 1 GeV.

Constraints derived from ATLAS and CMS data at 8 TeV.

Enhanced understanding of hidden gravitons' phenomenology at collider energies.

Abstract

We analyze LHC data in order to constrain the parameter space of new spin-2 particles universally coupled to the energy-momentum tensor. These new hypothetical particles are the so-called hidden gravitons, whose phenomenology at low energies is determined by two parameters: its mass and its dimensional coupling constant. Hidden gravitons arise in many different extensions of the Standard Model of particles and interactions and General Relativity. Their phenomenology has been studied mainly in relation to modifications of gravity and astrophysical signatures. In this work, we extend the constraints for heavy hidden gravitons, with masses larger than $1$ GeV, by taking into account events collected by ATLAS and CMS in the WW channel, Drell-Yan processes, and the diphoton channel from proton-proton collisions at $\sqrt{s}=8$ TeV.