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Probing the spin correlations of tt¯ production at NLO QCD+EW

Frederix, Rikkert LU orcid ; Tsinikos, Ioannis LU and Vitos, Timea LU (2021) In European Physical Journal C 81(9).
Abstract

In this work we investigate the NLO QCD+EW corrections to the top quark pair production and their effects on the spin correlation coefficients and asymmetries at fixed-order top quark pair production and LO decay in the dilepton channel, within the narrow-width approximation. The spin correlations are implicitly measured through the lepton kinematics. Moreover we study the EW effects to the leptonic differential distributions. We find that the EW corrections to the tt¯ production are within the NLO QCD theoretical uncertainties for the spin correlation coefficients and the leptonic asymmetries. On the other hand, for the differential distributions we find that the EW corrections exceed the NLO QCD scale uncertainty band in the high... (More)

In this work we investigate the NLO QCD+EW corrections to the top quark pair production and their effects on the spin correlation coefficients and asymmetries at fixed-order top quark pair production and LO decay in the dilepton channel, within the narrow-width approximation. The spin correlations are implicitly measured through the lepton kinematics. Moreover we study the EW effects to the leptonic differential distributions. We find that the EW corrections to the tt¯ production are within the NLO QCD theoretical uncertainties for the spin correlation coefficients and the leptonic asymmetries. On the other hand, for the differential distributions we find that the EW corrections exceed the NLO QCD scale uncertainty band in the high rapidity regimes and are of the order of the NLO QCD scale uncertainty in the case of invariant mass and transverse momentum distributions.

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Please use this url to cite or link to this publication:
author
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publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
81
issue
9
article number
817
publisher
Springer
external identifiers
  • scopus:85115072165
ISSN
1434-6044
DOI
10.1140/epjc/s10052-021-09612-9
language
English
LU publication?
yes
additional info
Funding Information: We thank Olivier Mattelaer for discussions regarding MadSpin. IT would like to thank Eleni Vryonidou for useful discussions on the spin correlation coefficient definitions. This work is done in the context of and supported by the Swedish Research Council under contract number 2016-05996. The work of IT is also supported by the MorePheno ERC grant agreement under number 668679. Computational resources to IT have been provided by the Consortium des Équipements de Calcul Intensif (CÉCI), funded by the Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under Grant No. 2.5020.11 and by the Walloon Region. Publisher Copyright: © 2021, The Author(s). Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
id
e3bed346-f30b-4a6c-8bff-25b5cb75bbf0
date added to LUP
2021-09-29 09:15:39
date last changed
2024-04-20 11:59:40
@article{e3bed346-f30b-4a6c-8bff-25b5cb75bbf0,
  abstract     = {{<p>In this work we investigate the NLO QCD+EW corrections to the top quark pair production and their effects on the spin correlation coefficients and asymmetries at fixed-order top quark pair production and LO decay in the dilepton channel, within the narrow-width approximation. The spin correlations are implicitly measured through the lepton kinematics. Moreover we study the EW effects to the leptonic differential distributions. We find that the EW corrections to the tt¯ production are within the NLO QCD theoretical uncertainties for the spin correlation coefficients and the leptonic asymmetries. On the other hand, for the differential distributions we find that the EW corrections exceed the NLO QCD scale uncertainty band in the high rapidity regimes and are of the order of the NLO QCD scale uncertainty in the case of invariant mass and transverse momentum distributions.</p>}},
  author       = {{Frederix, Rikkert and Tsinikos, Ioannis and Vitos, Timea}},
  issn         = {{1434-6044}},
  language     = {{eng}},
  number       = {{9}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C}},
  title        = {{Probing the spin correlations of tt¯ production at NLO QCD+EW}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-021-09612-9}},
  doi          = {{10.1140/epjc/s10052-021-09612-9}},
  volume       = {{81}},
  year         = {{2021}},
}