Probing of $Wtb$ Anomalous Couplings via the $tW$ Channel of Single Top Production

TL;DR

This paper investigates the potential of the LHC to probe anomalous $Wtb$ couplings via the $tW$ single top production channel, providing bounds on non-Standard Model interactions without contamination from FCNC.

Contribution

It introduces a method to study $Wtb$ couplings through the $tW$ channel at the LHC, focusing on separating signal from background at parton level and estimating bounds on anomalous couplings.

Findings

Estimated 68% C.L. bounds on non-Standard Model $Wtb$ couplings.

Demonstrated the feasibility of studying $Wtb$ vertex without FCNC contamination.

Analyzed signal-background separation for leptonic $W$ decays.

Abstract

The potential of LHC for investigation of the $W$-$t$-$b$ vertex through the $tW$ channel of single top quark production is studied. Unlike the other two single top quark production processes ($t-$channel and $s-$channel), the $tW$ channel provides the possibility to study the $Wtb$ vertex without receiving contamination from FCNC. This study has been done at parton level but is involved the separation of signal from backgrounds when both $W$-bosons decay to leptons. In this study $\mathcal{CP}$ is assumed to be conserved. The 68% C.L. bounds on the non-Standard Model couplings are estimated.