New backgrounds in Trilepton, Dilepton and Dilepton plus Tau Jet SUSY Signals at the Tevatron

TL;DR

This paper evaluates the Tevatron's ability to detect supersymmetric signals in various multilepton channels, accounting for backgrounds and optimizing cuts to improve detection prospects within the minimal supergravity model.

Contribution

It provides a comprehensive analysis of supersymmetric signals at the Tevatron, including the impact of previously neglected backgrounds and optimized cut strategies.

Findings

The $W\gamma^\ast$ background dominates other backgrounds.

Optimized cuts significantly improve signal detection.

Tevatron's reach in supersymmetry parameter space is quantified.

Abstract

We determine the Tevatron's reach in supersymmetric parameter space in trilepton, like-sign dilepton, and dilepton plus tau-jet channels, taking all relevant backgrounds into account. We show results for the minimal supergravity model. With a standard set of cuts we find that the previously unaccounted for $W\gamma^\ast$ background is larger than all other backgrounds combined. We include cuts on the dilepton invariant mass and the $W$-boson transverse mass to reduce the $W\gamma^\ast$ background to a reasonable level. We optimize cuts at each point in supersymmetry parameter space in order to maximize signal-to-noise.