Search for Randall-Sundrum gravitons in the dielectron and diphoton final states with 5.4 fb-1 of data from ppbar collisions at sqrt(s)=1.96 TeV

TL;DR

This study searches for Randall-Sundrum gravitons in dielectron and diphoton final states using Tevatron data, setting mass limits between 560 GeV and 1050 GeV based on observed collision events.

Contribution

First search for Randall-Sundrum gravitons in ee and gammagamma channels at Tevatron, establishing new mass exclusion limits for various coupling values.

Findings

Excluded graviton masses between 560 GeV and 1050 GeV.

Set 95% confidence level lower limits on graviton mass.

Provided constraints on the coupling parameter k/Mbar_pl.

Abstract

Using 5.4 fb-1 of integrated luminosity from ppbar collisions at sqrt(s)=1.96 TeV collected by the D0 detector at the Fermilab Tevatron Collider, we search for decays of the lightest Kaluza-Klein mode of the graviton in the Randall-Sundrum model to ee and gammagamma. We set 95% C.L. lower limits on the mass of the lightest graviton between 560 GeV and 1050 GeV for values of the coupling k/Mbar_pl between 0.01 and 0.1.