2021/06/30 by Davide Pagani, Hua-Sheng Shao, Ioannis Tsinikos +1
Physics and Astronomy · #Hadron #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Photon #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #hep-ex #hep-ph
paper · pdf · doi:10.1007/jhep09(2021)155
published as JHEP09(2021)155 · 32 pages, 4 figures, 5 tables. This version matches the one published
openalex publication_date 2021/09/01 · arxiv created 2021/10/01 · arxiv updated 2021/10/04 · openalex created_date 2021/10/11 · openalex updated_date 2026/08/04
A bstract In this work we compute for the first time the so-called Complete-NLO predictions for top-quark pair hadroproduction in association with at least one isolated photon ( t t <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> γ ). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons ( t t <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mi>t</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> γγ ) and for single-top hadroproduction in association with at least one isolated photon. In addition, we complement our results with NLO QCD+EW predictions of the hadronic and leptonic decays of top-quark including an isolated photon. All these results have been obtained in a completely automated approach, by extending the capabilities of the M ad G raph 5_ a MC@NLO framework and enabling the Complete-NLO predictions for processes with isolated photons in the final state. We discuss the technical details of the implementation, which involves a mixed EW renormalisation scheme for such processes.