Global Constraints on Top Quark Anomalous Couplings

TL;DR

This paper combines recent top quark measurements from Tevatron and LHC to set new constraints on possible anomalous couplings at the Wtb vertex, enhancing sensitivity to new physics beyond the Standard Model.

Contribution

It provides the first comprehensive analysis combining multiple top quark measurements to constrain anomalous Wtb couplings.

Findings

Significant sensitivity improvements over previous constraints.

Enhanced potential for discovering new physics at the High Luminosity LHC.

Quantified limits on Lorentz structure deviations in top quark interactions.

Abstract

The latest results on top quark physics, namely single top quark production cross sections, $W$-boson helicity and asymmetry measurements are used to probe the Lorentz structure of the $Wtb$ vertex. The increase of sensitivity to new anomalous physics contributions to the top quark sector of the Standard Model is quantified by combining the relevant results from Tevatron and the Large Hadron Collider. The results show that combining an increasing set of available precision measurements in the search for new physics phenomena beyond the Standard Model leads to significant sensitivity improvements, especially when compared with the current expectation for the High Luminosity run at the LHC.