# Measurements of inclusive and differential fiducial cross-sections of $t\bar{t}\gamma$ production in leptonic final states at $\sqrt{s}$ = 13 TeV

## TL;DR

This paper reports on measurements of how often top-quark pairs are produced with an associated photon in proton-proton collisions at 13 TeV, providing detailed cross-section data in specific final states.

## Contribution

It presents the first measurements of inclusive and differential fiducial cross-sections for t-tbar gamma production at 13 TeV in leptonic final states.

## Key findings

- Measured inclusive cross-sections agree with Standard Model predictions.
- Provided differential cross-section distributions across various kinematic variables.
- Enhanced understanding of top-quark photon interactions in high-energy collisions.

## Abstract

The latest results of the ATLAS experiment for the production of a top-quark pair in association with a photon using proton-proton collision data from the LHC at a centre-of-mass energy of 13 TeV are summarised here. This includes inclusive and differential cross-sections measurements performed in single-lepton and dilepton final states in a fiducial volume corresponding to the experimental acceptance.