Bin-to-bin correlations in the extraction of proton's transverse structure
Abstract
We investigate the determination of non-perturbative QCD contributions, associated with proton's transverse structure, from high-precision experimental data for electroweak boson production at the LHC. We demonstrate that these determinations are strongly affected by correlated uncertainties across transverse-momentum bins in the region of low boson's transverse momenta. We illustrate our results through a detailed analysis of LHCb measurements of Z-boson spectra at forward rapidities, and a comparison with CMS measurements at central rapidities. We further examine the influence on the extraction of the non-perturbative parameters from final-state electromagnetic radiation, photon-induced background, large-x contributions to parton distributions in the forward region, matching to perturbative next-to-leading order. We comment on the comparison of our results with those from the underlying-event tuning of parton-shower Monte Carlo event generators.
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BibTeX
@misc{favart2026bintobin,
title = {{Bin-to-bin correlations in the extraction of proton's transverse structure}},
author = {Laurent Favart and Francesco Hautmann and Aleksandra Lelek and Louis Moureaux},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.25204},
eprint = {2609.25204},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.25204},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Bin-to-bin correlations in the extraction of proton's transverse structure
AU - Laurent Favart
AU - Francesco Hautmann
AU - Aleksandra Lelek
AU - Louis Moureaux
PY - 2026
DA - 2026/09/21
PB - arXiv
DO - 10.48550/arxiv.2609.25204
UR - https://arxiv.org/abs/2609.25204
AB - We investigate the determination of non-perturbative QCD contributions, associated with proton's transverse structure, from high-precision experimental data for electroweak boson production at the LHC. We demonstrate that these determinations are strongly affected by correlated uncertainties across transverse-momentum bins in the region of low boson's transverse momenta. We illustrate our results through a detailed analysis of LHCb measurements of Z-boson spectra at forward rapidities, and a comparison with CMS measurements at central rapidities. We further examine the influence on the extraction of the non-perturbative parameters from final-state electromagnetic radiation, photon-induced background, large-x contributions to parton distributions in the forward region, matching to perturbative next-to-leading order. We comment on the comparison of our results with those from the underlying-event tuning of parton-shower Monte Carlo event generators.
ER -