Search for New Dielectron Resonances and Randall-Sundrum Gravitons at the Collider Detector at Fermilab

TL;DR

This paper reports a search for new dielectron resonances and Randall-Sundrum gravitons at Fermilab, finding no significant excess but setting the strongest lower mass limits to date for RS gravitons.

Contribution

First search for dielectron resonances at Fermilab with the highest dielectron mass observed and improved limits on RS graviton masses.

Findings

No significant excess over the standard model prediction.

Recorded the highest dielectron mass event at 960 GeV/c^2.

Set the strongest lower mass limit for RS gravitons at 1058 GeV/c^2.

Abstract

A search for new dielectron mass resonances using data recorded by the CDF II detector and corresponding to an integrated luminosity of 5.7/fb is presented. No significant excess over the expected standard model prediction is observed. In this dataset, an event with the highest dielectron mass ever observed (960 GeV/c^2) was recorded. The results are interpreted in the Randall-Sundrum (RS) model. Combined with the 5.4/fb diphoton analysis, the RS-graviton lower mass limit for the coupling k/\bar{M}_{Pl}=0.1 is 1058 GeV/c^2, making it the strongest limit to date.