Regular Article - Theoretical Physics
QCD corrections in production at hadron colliders
Department of Physics, Kennesaw State University, 30144, Kennesaw, GA, USA
2 Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Furocho, Chikusa, 464-8602, Nagoya, Aichi, Japan
3 Nishina Center for Accelerator-Based Science, RIKEN, 351-0198, Wako, Japan
Accepted: 26 July 2022
Published online: 4 August 2022
We study QCD corrections for the associated production of a single top quark and a photon ( production) at hadron colliders. We calculate the NLO cross section at LHC and future collider energies for a variety of kinematical cuts, and we estimate uncertainties from scale dependence and from parton distributions. We also calculate differential distributions in top-quark transverse-momentum and rapidity as well as photon energy. Finally, we study higher-order corrections from soft-gluon emission for this process, and we provide approximate NNLO (aNNLO) results for the cross section and top-quark differential distributions. We also compare our calculations with recent measurements from CMS and ATLAS at the LHC and find that the aNNLO corrections improve the comparison between the data and the Standard Model predictions.
© The Author(s) 2022
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