QCD corrections in production at hadron colliders

Nikolaos Kidonakis; Nodoka Yamanaka

doi:10.1140/epjc/s10052-022-10643-z

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2022) 82: 670
https://doi.org/10.1140/epjc/s10052-022-10643-z

Regular Article - Theoretical Physics

QCD corrections in $t q γ$ $tq\gamma$ production at hadron colliders

Nikolaos Kidonakis¹^a and Nodoka Yamanaka²^,3

¹ 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

^a nkidonak@kennesaw.edu

Received: 17 June 2022
Accepted: 26 July 2022
Published online: 4 August 2022

Abstract

We study QCD corrections for the associated production of a single top quark and a photon ( $t q γ$ $tq\gamma$ 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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