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Electroweak corrections to the angular coefficients in finite- pT Z-boson production and dilepton decay

Frederix, Rikkert LU orcid and Vitos, Timea LU (2020) In European Physical Journal C 80(10).
Abstract

We present next-to-leading order (NLO) electroweak corrections to the dominant five angular coefficients parametrizing the Drell–Yan process in the Z-boson mass peak range for finite-pT vector boson production. The results are presented differentially in the vector boson transverse momentum. The Lam–Tung violating difference A- A2 is examined alongside the coefficients. A single lepton transverse momentum cut is needed in the case of electroweak corrections to avoid a double singularity in the photon induced diagrams, and the dependence on the value of this cut is examined. We compare the electroweak corrections to the angular coefficients to the NLO QCD corrections, including the single lepton cut. The size of the... (More)

We present next-to-leading order (NLO) electroweak corrections to the dominant five angular coefficients parametrizing the Drell–Yan process in the Z-boson mass peak range for finite-pT vector boson production. The results are presented differentially in the vector boson transverse momentum. The Lam–Tung violating difference A- A2 is examined alongside the coefficients. A single lepton transverse momentum cut is needed in the case of electroweak corrections to avoid a double singularity in the photon induced diagrams, and the dependence on the value of this cut is examined. We compare the electroweak corrections to the angular coefficients to the NLO QCD corrections, including the single lepton cut. The size of the single lepton cut is found to affect the two coefficients A and A2 to largest extent. The relative size of the electroweak corrections to the coefficients is moderate for all single lepton cut values, and by extrapolation to the inclusive results, is moderate also for the full dilepton phase space case. However, for the Lam–Tung violation, there is a significant contribution from the electroweak corrections for low pT of the lepton pair.

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type
Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
80
issue
10
article number
939
publisher
Springer
external identifiers
  • scopus:85092275682
ISSN
1434-6044
DOI
10.1140/epjc/s10052-020-08513-7
language
English
LU publication?
yes
id
95483625-ba6d-4cc7-810d-f1716f4a9e04
date added to LUP
2020-11-02 15:23:57
date last changed
2024-03-20 18:55:39
@article{95483625-ba6d-4cc7-810d-f1716f4a9e04,
  abstract     = {{<p>We present next-to-leading order (NLO) electroweak corrections to the dominant five angular coefficients parametrizing the Drell–Yan process in the Z-boson mass peak range for finite-p<sub>T</sub> vector boson production. The results are presented differentially in the vector boson transverse momentum. The Lam–Tung violating difference A- A<sub>2</sub> is examined alongside the coefficients. A single lepton transverse momentum cut is needed in the case of electroweak corrections to avoid a double singularity in the photon induced diagrams, and the dependence on the value of this cut is examined. We compare the electroweak corrections to the angular coefficients to the NLO QCD corrections, including the single lepton cut. The size of the single lepton cut is found to affect the two coefficients A and A<sub>2</sub> to largest extent. The relative size of the electroweak corrections to the coefficients is moderate for all single lepton cut values, and by extrapolation to the inclusive results, is moderate also for the full dilepton phase space case. However, for the Lam–Tung violation, there is a significant contribution from the electroweak corrections for low p<sub>T</sub> of the lepton pair.</p>}},
  author       = {{Frederix, Rikkert and Vitos, Timea}},
  issn         = {{1434-6044}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{10}},
  publisher    = {{Springer}},
  series       = {{European Physical Journal C}},
  title        = {{Electroweak corrections to the angular coefficients in finite- p<sub>T</sub> Z-boson production and dilepton decay}},
  url          = {{http://dx.doi.org/10.1140/epjc/s10052-020-08513-7}},
  doi          = {{10.1140/epjc/s10052-020-08513-7}},
  volume       = {{80}},
  year         = {{2020}},
}