Effective-Field-Theory Approach to Top-Quark Production and Decay

TL;DR

This paper employs an effective field theory framework to analyze potential new physics effects in top-quark production and decay, systematically identifying operators and deviations from the Standard Model to guide future searches.

Contribution

It introduces a comprehensive set of 15 dimension-six operators affecting top-quark processes and calculates their impact on observables, providing a systematic approach for new physics searches.

Findings

Identified 15 relevant dimension-six operators for top-quark interactions.

Calculated deviations from the Standard Model due to these operators.

Provided a framework for constraining new physics through top-quark measurements.

Abstract

We discuss new physics in top-quark interactions, using an effective field theory approach. We consider top-quark decay, single top production, and top-quark pair production. We identify 15 dimension-six operators that contribute to these processes, and we compute the deviation from the Standard Model induced by these operators. The results provide a systematic way of searching for (or obtaining bounds on) physics beyond the Standard Model.