Complete NLO corrections to $t\bar{t}\gamma$ and $t\bar{t}\gamma\gamma$

TL;DR

This paper presents comprehensive next-to-leading order (NLO) calculations for top-quark pair production with one or two photons, emphasizing the combined effects of higher-order corrections and photon radiation in production and decay.

Contribution

It introduces the first complete NLO corrections for $t\bar{t}\gamma$ and $t\bar{t}\gamma\gamma$ processes, including photon radiation in both production and decay.

Findings

Photon radiation significantly impacts decay processes.

Complete NLO corrections are essential for accurate predictions.

Higher-order effects alter cross-section estimates.

Abstract

In this contribution we discuss recent progress in associated top-quark pair production with one or two isolated photons, $pp\to t\bar{t}\gamma(\gamma)$. The focus is the simultaneous inclusion of higher-order effects and photon radiation in the production of the top-quark pair and in the decay processes. This allows us to quantify the importance of photon radiation in decay processes and the size of the so-called complete NLO corrections in realistic final states.