Search for Randall-Sundrum gravitons with 1 fb-1 of data from ppbar collisions at sqrt(s)=1.96 TeV

TL;DR

This study searches for Randall-Sundrum gravitons in proton-antiproton collisions at Fermilab, setting mass limits based on decay channels to electrons and photons, thereby constraining extra-dimensional models.

Contribution

First search for Randall-Sundrum gravitons at the Tevatron using 1 fb-1 data, establishing new mass limits for various coupling strengths.

Findings

Excluded graviton masses between 300 and 900 GeV.

Set 95% confidence level upper limits on production cross sections.

Constrained parameters of the Randall-Sundrum model.

Abstract

Using 1 fb-1 of data from ppbar collisions at sqrt(s)=1.96 TeV at the Fermilab Tevatron collider collected by the D0 detector, we search for decays of Kaluza-Klein excitations of the graviton in the Randall-Sundrum model of extra dimensions to e+e- and diphotons. We set 95% confidence level upper limits on the production cross section times branching fraction which translate into lower limits on the mass of the lightest excitation between 300 and 900 GeV for values of the coupling k/M(Planck) between 0.01 and 0.1.