Associated production of a top quark with a photon via anomalous couplings

Abstract

We discuss the associated production of a top quark with a photon via anomalous $t$-$q$-$\gamma$ couplings, and present higher-order corrections from soft-gluon emission for the processes $gq\to t\gamma$ at LHC energies. We perform soft-gluon resummation at next-to-leading-logarithm accuracy and derive approximate next-to-next-to-leading order (aNNLO) double-differential cross sections. We calculate at aNNLO the total $t\gamma$ production cross sections and the top-quark transverse-momentum and rapidity distributions for various LHC energies, and show that the soft-gluon corrections are large and dominant in these processes.

arXiv comment11 pages, 6 figures; published version

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• Soft anomalous dimensions for single-top production at three loops
• Resummation for $2\to n$ processes in single-particle-inclusive kinematics
• UV physics from IR features: new prospects from top flavor violation
• Soft-gluon corrections for the associated production of a single top quark and a Higgs boson
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• $t{Z}^{\prime }$ production at hadron colliders
• Soft-gluon corrections for single top quark production in association with electroweak bosons
• Theoretical predictions for top-quark production processes
• Total and differential cross sections for Higgs and top-quark production