Higher-order corrections in $t{\bar t}\gamma$ cross sections
High Energy Physics - Phenomenology
2023-03-01 v1
Abstract
We study higher-order QCD corrections for the associated production of a top-antitop quark pair and a photon ( production) in proton-proton collisions. We calculate the approximate NNLO cross section, with second-order soft-gluon corrections added to the complete NLO result, including uncertainties from scale dependence and from parton distributions. We compare our results to recent measurements from the LHC, and find that the soft-gluon corrections provide improved agreement with the data. We also calculate differential distributions in top-quark transverse momentum and rapidity.
Keywords
Cite
@article{arxiv.2212.00096,
title = {Higher-order corrections in $t{\bar t}\gamma$ cross sections},
author = {Nikolaos Kidonakis and Alberto Tonero},
journal= {arXiv preprint arXiv:2212.00096},
year = {2023}
}
Comments
10 pages, 4 figures, 1 table