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

Pagani, Davide ; Shao, Hua Sheng ; Tsinikos, Ioannis LU and Zaro, Marco (2021) In Journal of High Energy Physics 2021(9).
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.... (More)

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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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
NLO Computations
in
Journal of High Energy Physics
volume
2021
issue
9
article number
155
publisher
Springer
external identifiers
  • scopus:85116033669
ISSN
1029-8479
DOI
10.1007/JHEP09(2021)155
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021, The Author(s).
id
fac1db6f-6285-4c3b-b3d0-3c65e0a8df16
date added to LUP
2021-10-13 14:55:54
date last changed
2024-04-20 13:03:29
@article{fac1db6f-6285-4c3b-b3d0-3c65e0a8df16,
  abstract     = {{<p>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.</p>}},
  author       = {{Pagani, Davide and Shao, Hua Sheng and Tsinikos, Ioannis and Zaro, Marco}},
  issn         = {{1029-8479}},
  keywords     = {{NLO Computations}},
  language     = {{eng}},
  number       = {{9}},
  publisher    = {{Springer}},
  series       = {{Journal of High Energy Physics}},
  title        = {{Automated EW corrections with isolated photons : t t¯ γ, t t¯ γγ and tγj as case studies}},
  url          = {{http://dx.doi.org/10.1007/JHEP09(2021)155}},
  doi          = {{10.1007/JHEP09(2021)155}},
  volume       = {{2021}},
  year         = {{2021}},
}