aNNLO results for $t\bar{t}\gamma$ cross sections

Abstract

We present theoretical calculations of total cross sections and top-quark transverse-momentum and rapidity distributions in the associated production of a top-antitop pair with a photon ($t\bar{t}\gamma$ production). We include complete QCD and electroweak corrections at NLO as well as soft-gluon corrections at approximate NNLO (aNNLO). The aNNLO corrections are very significant, they decrease theoretical uncertainties, and they are needed for better comparison with data from the LHC.

Comments: 6 pages, 2 figures; presented at DIS2023, XXX International Workshop on Deep-Inelastic Scattering and Related Subjects, 27-31 March 2023