New physics contributions to $Wtb$ anomalous couplings and top-quark decay

TL;DR

This paper investigates how anomalous $Wtb$ couplings, including CP-violating effects, influence top-quark decay at the LHC, providing sensitivity estimates and exploring potential signals at current and future collider energies.

Contribution

It introduces a comprehensive analysis of anomalous $Wtb$ interactions, including CP violation, in top-quark decays with sensitivity estimates for various collider energies.

Findings

Sensitivity estimates at 5σ CL for current and future LHC runs.

Inclusion of CP-violating asymmetries in $Wtb$ interactions.

Projected constraints for 14 TeV, 27 TeV, and 100 TeV colliders.

Abstract

In this work, we study the new physics effects arising due the presence of anomalous $Wtb$ vertex through the semileptonic decay modes of the top-quark at the Large Hadron Collider. An estimate on the sensitivities of the aforementioned interaction at 5$\sigma$ CL in the context of top-quark decay-width measurements and cross-section measurements would also be discussed for the pre-existing 13 TeV LHC data and its projections for the proposed LHC runs at 14 TeV, 27 TeV and 100 TeV. We also incorporate the $\mathcal CP$-violating effects to such interactions by constructing the $\mathcal CP$-violating asymmetries.