Abstract
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\( \overline{t} \)γ). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons (t\( \overline{t} \)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 MadGraph5_aMC@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.
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Pagani, D., Shao, HS., Tsinikos, I. et al. Automated EW corrections with isolated photons: t\( \overline{t} \)γ, t\( \overline{t} \)γγ and tγj as case studies. J. High Energ. Phys. 2021, 155 (2021). https://doi.org/10.1007/JHEP09(2021)155
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DOI: https://doi.org/10.1007/JHEP09(2021)155