A Search for Single Top Quark Production at DZero

TL;DR

This paper reports a search for single top quark production at Fermilab's Tevatron collider, setting upper limits on production cross sections using data from the DZero detector in electron+jets and muon+jets channels.

Contribution

It provides the first upper limits on the electroweak production cross sections of single top quarks at Tevatron energies.

Findings

Upper limit for s-channel process: 39 pb

Upper limit for t-channel process: 58 pb

Data collected from 90 pb^-1 of Run 1 at 1.8 TeV

Abstract

We present details of a search for electroweak production of single top quarks in the electron+jets and muon+jets decay channels. The measurements use \~90 pb^-1 of data from Run 1 of the Fermilab Tevatron collider, collected at 1.8 TeV with the DZero detector. We use events that include a tagging muon, implying the presence of a b jet, to set an upper limit at the 95% confidence level on the cross section for the s-channel process ppbar->tb+X of 39 pb. The upper limit for the t-channel process ppbar->tqb+X is 58 pb.