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) over bar gamma). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons (t (t) over bar gamma gamma) 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.

Automated EW corrections with isolated photons: t t¯ γ, t t¯ γγ and tγj as case studies / D. Pagani, H. Shao, I. Tsinikos, M. Zaro. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2021:9(2021), pp. 155.1-155.34. [10.1007/JHEP09(2021)155]

Automated EW corrections with isolated photons: t t¯ γ, t t¯ γγ and tγj as case studies

D. Pagani
;
M. Zaro
2021

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 (t) over bar gamma). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons (t (t) over bar gamma gamma) 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.
NLO Computations
Settore FIS/02 - Fisica Teorica, Modelli e Metodi Matematici
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/871180
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