Signals of Warped Extra Dimensions at the LHC

TL;DR

This paper investigates how to identify spin-2 gravitons predicted by the Randall-Sundrum model at the LHC, using angular analysis to distinguish them from other particles in dilepton and diphoton events.

Contribution

It introduces a method to discriminate graviton signals from other spins using angular distributions, providing mass and coupling ranges for detection at the LHC.

Findings

Graviton identification possible up to 1.1-2.4 TeV at 14 TeV LHC with 10-100 fb^{-1} luminosity.

Angular analysis effectively distinguishes spin-2 gravitons from spin-1 and spin-0 particles.

Detection sensitivity depends on the graviton's coupling to quarks and leptons.

Abstract

We discuss the signatures of the spin-2 graviton excitations predicted by the Randall-Sundrum model with one warped extra dimension, in dilepton and diphoton production at LHC. By using a specific angular analysis, we assess the ranges in mass and coupling constant where such gravitons can be discriminated against competitor spin-1 and spin-0 objects, that potentially could manifest themselves in these processes with the same mass and rate of events. Depending on the value of the coupling constant to quarks and leptons, the numerical results indicate graviton identification mass ranges up to 1.1-2.4 TeV and 1.6-3.2 TeV for LHC nominal energy of 14 TeV and time-integrated luminosity of 10 and 100~${\rm fb}^{-1}$, respectively.