Single Top Quark Production at D{\O}

TL;DR

This paper reports new measurements of single top quark production at the Fermilab Tevatron, analyzing the data to probe the Lorentz structure of the Wtb coupling and searching for signs of physics beyond the Standard Model.

Contribution

It provides the first measurement of the single top quark production cross section at 1.96 TeV and constrains anomalous Wtb couplings using data from the D0 detector.

Findings

Measured the single top quark production cross section.

Found data favor the left-handed vector Wtb coupling.

Set upper limits on anomalous couplings.

Abstract

We present new measurements of the single top quark production cross section in \ppbar collisions at $\sqrt{s} = 1.96 TeV$ using data corresponding to 5.4 \ifb of integrated luminosity collected by the {\dzero} detector at the Fermilab Tevatron collider. The large mass of the top quark, close to the electroweak symmetry-breaking scale, makes it a good candidate for probing physics beyond the Standard Model, including possible anomalous couplings. We examine the data to study the Lorentz structure of the $Wtb$ coupling, and find that the data prefer the left-handed vector coupling, and set upper limits on the anomalous couplings.