Supersymmetry Reach of the Tevatron via Trilepton, Like-Sign Dilepton and Dilepton plus Tau Jet Signatures

TL;DR

This paper evaluates the Tevatron's ability to detect supersymmetry through various multilepton signatures, highlighting the importance of optimized cuts and background analysis to improve detection reach.

Contribution

It introduces an invariant mass cut and a parameter space-specific cut optimization method to enhance supersymmetry detection sensitivity at the Tevatron.

Findings

Larger backgrounds reduce the Tevatron's supersymmetry reach.

Invariant mass cuts improve signal-to-noise ratio.

Optimized cuts significantly extend the detection reach.

Abstract

We determine the Tevatron's reach in supersymmetric parameter space in trilepton, like-sign dilepton, and two lepton one tau-jet channels. We critically study the standard model background processes. We find larger backgrounds and, hence, significantly smaller reach regions than recent analyses. We identify the major cause of the background discrepancy. We improve signal-to-noise by introducing an invariant mass cut which takes advantage of a sharp edge in the signal dilepton invariant mass distribution. Also, we independently vary the cuts at each point in SUSY parameter space to determine the set which yields the maximal reach. We find that this cut optimization can significantly enhance the Tevatron reach.