QCD corrections in $tq\gamma$ production at hadron colliders

Abstract

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

15 pages, 7 figures, 10 tables; v2 has a lot of additional new material

References in corpus (13)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• Two-loop soft anomalous dimensions for single top quark associated production with a W- or H-
• Measurement of the permanent electric dipole moment of the neutron
• Next-to-next-to-leading-order collinear and soft gluon corrections for t-channel single top quark production
• NNLL resummation for s-channel single top quark production
• Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs
• The Path to Proton Structure at One-Percent Accuracy
• Next-to-next-to-leading soft-gluon corrections for the top quark cross section and transverse momentum distribution
• Two-loop soft anomalous dimensions and NNLL resummation for heavy quark production
• Soft anomalous dimensions for single-top production at three loops
• Automated EW corrections with isolated photons: $t\bar{t}\gamma$, $t\bar{t}\gamma \gamma$ and $t\gamma j$ as case studies
• Soft-gluon corrections for the associated production of a single top quark and a Higgs boson

Cited by in corpus (8)

• Higher-order corrections in $t\bar{t}\gamma$ cross sections
• Observation of Single-Top-Quark Production in Association with a Photon Using the ATLAS Detector
• Soft-gluon corrections for $tqZ$ production
• Soft-gluon corrections in $t\bar{t}W$ production
• SMEFT chromomagnetic dipole operator contributions to $t\bar{t}$ production at approximate NNLO in QCD
• Resummation for $s$-channel single-top production
• Single-top quark physics at the LHC: from precision measurements to rare processes and top quark properties
• Higher-order QCD and electroweak corrections for $t\bar{t}H$ production