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

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 $\mathcal{C}P$-violating effects to such interactions by constructing the $\mathcal{C}P$-violating asymmetries.

Comments: 4 pages, 2 figures, 2 tables, To be published in the proceedings of International Conference on High Energy Physics (ICHEP 2022), Bologna (Itly)