Search for Randall-Sundrum Gravitons in Dilepton and Diphoton Final States

TL;DR

This paper reports a direct search for Randall-Sundrum gravitons in dilepton and diphoton final states at the Fermilab Tevatron, setting new lower mass limits but finding no evidence of their existence.

Contribution

First direct search for Randall-Sundrum Kaluza-Klein gravitons using multiple final states at the Tevatron with new mass exclusion limits.

Findings

No evidence for graviton resonances was observed.

Lower mass limits between 250 and 785 GeV were established.

Constraints depend on the graviton coupling to Standard Model particles.

Abstract

We report the first direct search for the Kaluza-Klein (KK) modes of Randall-Sundrum gravitons using dielectron, dimuon, and diphoton events observed with the D0 detector operating at the Fermilab Tevatron ppbar Collider at sqrt(s) = 1.96 TeV. No evidence for resonant production of gravitons has been found in the data corresponding to an integrated luminosity of approximately 260 pb^-1. Lower limits on the mass of the first KK mode at the 95% C.L. have been set between 250 and 785 GeV, depending on its coupling to SM particles.