Automatic computations at next-to-leading order in QCD for top-quark flavor-changing neutral processes

TL;DR

This paper develops an automated framework for next-to-leading order QCD calculations involving top-quark flavor-changing neutral processes within the effective field theory, enabling precise predictions for LHC experiments.

Contribution

It introduces a novel automated method for NLO QCD computations with higher-dimensional operators in top-quark effective field theory, including flavor-changing neutral interactions.

Findings

First complete NLO QCD results for top-quark flavor-changing processes

Inclusion of parton shower effects in the predictions

Enhanced precision for LHC top-quark studies

Abstract

Computations at next-to-leading order in the Standard Model offer new technical challenges in presence of higher dimensional operators. We introduce a framework that, starting from the top-quark effective field theory at dimension six, allows to make predictions for cross sections as well as distributions in a fully automatic way. As an application, we present the first complete results at NLO in QCD for flavor changing neutral interactions including parton shower effects, for $tZ$, $th$, $t\gamma$ associated production at the LHC.