Investigation of the difference in the angular distributions of Z→ ℓ+ℓ− events produced in quark-antiquark, quark-gluon and gluon-gluon collisions
Abstract
Measurements of the angular distributions of Z boson-decay leptons at the Large Hadron Collider (LHC) are of interest in QCD studies and precision electroweak measurements. Z boson production at the LHC is dominated by quark-gluon processes and the quark-antiquark process accounts for only 40\% of the cross section. We investigate the theoretical predictions (using the POWHEG-minnlops event generator) for the difference in the angular distributions of $ pp \to γ^{*}/Z \to \ell^+\ell^-$ ($ μ^+μ^-$ or e+e−) events produced via quark-antiquark, quark-gluon , and gluon-gluon processes. The study is done for proton-proton collisions at the Large Hadron Collider (LHC) at √s = 13 TeV. We investigate the angular coefficients A0 and A2 (for θCS and ϕCS distributions in the Collins-Soper frame) for the different processes as a function of the Z boson rapidity, transverse momentum and final state jet multiplicity, and propose how these can be investigated experimentally at the LHC.
Related
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- Search for dark matter produced in association with a low-multiplicity jet in proton-proton collisions at √s = 13 TeV
BibTeX
@misc{bodek2026investigation,
title = {{Investigation of the difference in the angular distributions of $Z\to \ell^+\ell^-$ events produced in quark-antiquark, quark-gluon and gluon-gluon collisions}},
author = {Arie Bodek and Giulia-Maria Bulugean and Aran Garcia-Bellido and Hyon San Seo and Rhys Taus and Un-Ki Yang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.23552},
eprint = {2609.23552},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.23552},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Investigation of the difference in the angular distributions of Z→ ℓ^+ℓ^− events produced in quark-antiquark, quark-gluon and gluon-gluon collisions
AU - Arie Bodek
AU - Giulia-Maria Bulugean
AU - Aran Garcia-Bellido
AU - Hyon San Seo
AU - Rhys Taus
AU - Un-Ki Yang
PY - 2026
DA - 2026/09/20
PB - arXiv
DO - 10.48550/arxiv.2609.23552
UR - https://arxiv.org/abs/2609.23552
AB - Measurements of the angular distributions of Z boson-decay leptons at the Large Hadron Collider (LHC) are of interest in QCD studies and precision electroweak measurements. Z boson production at the LHC is dominated by quark-gluon processes and the quark-antiquark process accounts for only 40\% of the cross section. We investigate the theoretical predictions (using the POWHEG-minnlops event generator) for the difference in the angular distributions of $ pp \to γ^{*}/Z \to \ell^+\ell^-$ ($ μ^+μ^-$ or e^+e^−) events produced via quark-antiquark, quark-gluon , and gluon-gluon processes. The study is done for proton-proton collisions at the Large Hadron Collider (LHC) at √s = 13 TeV. We investigate the angular coefficients A_0 and A_2 (for θ_CS and ϕ_CS distributions in the Collins-Soper frame) for the different processes as a function of the Z boson rapidity, transverse momentum and final state jet multiplicity, and propose how these can be investigated experimentally at the LHC.
ER -