Searches for new physics in top decays at the LHC

TL;DR

This paper reviews searches for new physics in top quark decays at the LHC, covering Standard Model measurements, W boson polarization, Wtb vertex structure, and potential beyond Standard Model decays involving gauge bosons.

Contribution

It provides a comprehensive overview of experimental results from ATLAS and CMS on top quark decays, including Standard Model tests and searches for new physics beyond it.

Findings

Measurements of W boson polarization consistent with Standard Model

Constraints on top quark couplings to gauge bosons

Limits set on top decays beyond the Standard Model

Abstract

The search for new physics in top quark decays at the LHC is reviewed in this paper. Results from ATLAS and CMS experiments on top quark decays within the Standard Model are presented together with the measurements of the W boson polarizations and the study of the structure of the Wtb vertex. As a natural step forward, the experimental status on measurements sensitive to top quark couplings to gauge bosons (\gamma, Z, W and H) is reviewed as well as possible top quark decays Beyond the Standard Model (MSSM and FCNC).