Search for Scalar Top Quark Production in p-pbar Collisions at 1.8 TeV

TL;DR

This paper reports a search for scalar top quark production in proton-antiproton collisions at 1.8 TeV, analyzing specific decay signatures, and sets upper limits on production cross sections due to no observed evidence.

Contribution

First search for scalar top quark production at Fermilab with detailed analysis of decay channels and setting upper limits on production cross sections.

Findings

No evidence for scalar top production was observed.

Upper limits on production cross sections were established.

Analysis constrains possible scalar top quark properties.

Abstract

We have searched for direct production of scalar top quarks at the Collider Detector at Fermilab in 88 pb-1 of p anti-p collisions at s**(1/2) = 1.8 TeV. We assume the scalar top quark decays into either a bottom quark and a chargino or a bottom quark, a lepton, and a scalar neutrino. The event signature for both decay scenarios is a lepton, missing transverse energy, and at least two b-quark jets. For a chargino mass of 90 GeV/c2 and scalar neutrino masses of at least 40 GeV/c2, we find no evidence for scalar top production and present upper limits on the production cross section in both decay scenarios.