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

Davide Pagani; Hua Sheng Shao; Ioannis Tsinikos; Marco Zaro

doi:10.1007/JHEP09(2021)155

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

Davide Pagani, Hua Sheng Shao, Ioannis Tsinikos, Marco Zaro

Research output: Contribution to journal › Article › peer-review

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 (tt¯ γ). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons (tt¯ 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.

Original language	English
Article number	155
Journal	Journal of High Energy Physics
Volume	2021
Issue number	9
DOIs	https://doi.org/10.1007/JHEP09(2021)155
Publication status	Published - 2021 Sept

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Subatomic Physics

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NLO Computations

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10.1007/JHEP09(2021)155Licence: CC BY

Cite this

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

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 (tt¯ γ). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons (tt¯ 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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T2 - t t¯ γ, t t¯ γγ and tγj as case studies

AU - Pagani, Davide

AU - Shao, Hua Sheng

AU - Tsinikos, Ioannis

AU - Zaro, Marco

PY - 2021/9

Y1 - 2021/9

N2 - 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 (tt¯ γ). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons (tt¯ 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.

AB - 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 (tt¯ γ). We also compute NLO QCD+EW predictions for the similar case with at least two isolated photons (tt¯ 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.

KW - NLO Computations

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DO - 10.1007/JHEP09(2021)155

M3 - Article

AN - SCOPUS:85116033669

SN - 1029-8479

VL - 2021

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 9

M1 - 155

ER -

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

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