Stop Squark Search at Tevatron in the Light Slepton Scenario

TL;DR

This paper investigates the potential to detect lighter stop squarks at the Tevatron collider within a light slepton scenario of supersymmetry, focusing on dilepton plus jets and missing energy signatures.

Contribution

It explores the detectability of lighter stop squarks in minimal supergravity models considering light sleptons, analyzing decay channels and experimental sensitivities at Tevatron.

Findings

Stop squark masses up to 140 GeV can be probed with current data.

Light slepton scenario enhances the detectability of lighter stop squarks.

Future upgrades could increase the number of observable events.

Abstract

In minimal supergravity based supersymmetry models the charged sleptons as well as the sneutrinos may be lighter than the squarks. In such light slepton scenario the search for lighter stop squark has been investigated in the dilepton + missing $p_T(\missingpt)$ +jets ($\ge 1$) channel at Tevatron. In this scenario semileptonic decay of lighter stop squark has been considered via off shell and on shell charginos. In the latter case the chargino undergoes pure leptonic 2-body decay. We observe that for some favourable region of the MSSM parameter space one can probe lighter stop squark mass upto 140 GeV with few events in the present data set for which the luminosity is 110 pb$^{-1}$. At the MI upgrade one is likely to end up with more events.