Constraints on the Wtb vertex from early LHC data

TL;DR

This paper combines early LHC measurements of top quark decay asymmetries and single top production to set new limits on the Wtb vertex, improving constraints over individual measurements but still weaker than Tevatron results.

Contribution

It provides the first combined LHC limits on the Wtb vertex using multiple measurements, enhancing the precision of constraints.

Findings

Combined LHC data yields improved Wtb vertex limits.

LHC constraints are comparable but weaker than Tevatron results.

First such combined analysis using early LHC data.

Abstract

We use the recent measurements of top quark decay asymmetries in ATLAS and the t-channel single top cross section in CMS to set the first combined LHC limits on the Wtb vertex. This combination allows to obtain much better limits than the separate measurements. The resulting constraints are comparable, although still weaker, than the ones obtained using Tevatron data with much more statistics.