Search for Electroweak Production of Single Top Quarks in ppbar Collisions

Abstract

We present 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 between 1992 and 1995. 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.

Figures (2)

• Figure 1: Leading order Feynman diagrams for single top quark production at the Tevatron, where (a) shows the $s$-channel mode, and (b) the $t$-channel mode.
• Figure 2: Variable used to reject $t\bar{t}$ background.