Top, Polarization, LHC and New Physics

TL;DR

This paper explores how top quark polarization measurements at the LHC can reveal new physics beyond the Standard Model, especially in light of constraints from rare B decays, using an effective theory framework.

Contribution

It analyzes the relationship between indirect constraints from B physics and direct top polarization measurements at the LHC within an effective operator approach.

Findings

Top polarization observables are sensitive to new physics effects.

Constraints from B physics limit possible new physics contributions.

Effective operators can be classified to study their impact on top interactions.

Abstract

Polarization observables in top quark decays are sensitive probes of possible new physics contributions to the interactions of the heavy third generation quarks. Within an effective theory approach such new physics contributions can be classified in terms of several higher dimensional operators. We investigate the interplay between indirect constraints on such operators, coming mainly from rare B physics processes, and direct measurements of top polarization observables at the LHC.