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Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets

Aad, G; Abbott, B; Abbott, DC; Abed Abud, A; Abeling, K; Abhayasinghe, DK; Abidi, SH; ... Zwalinski, L; + view all (2021) Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets. Journal of High Energy Physics , Article 223. 10.1007/JHEP07(2021)223. Green open access

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Abstract

This article presents a new set of proton parton distribution functions, ATLASepWZVjet20, produced in an analysis at next-to-next-to-leading order in QCD. The new data sets considered are the measurements of W^{+} and W^{−} boson and Z boson production in association with jets in pp collisions at \sqrt{s} = 8 TeV performed by the ATLAS experiment at the LHC with integrated luminosities of 20.2 fb^{−1} and 19.9 fb^{−1}, respectively. The analysis also considers the ATLAS measurements of differential W± and Z boson production at \sqrt{s} = 7 TeV with an integrated luminosity of 4.6 fb^{−1} and deep-inelastic-scattering data from e±p collisions at the HERA accelerator. An improved determination of the sea-quark densities at high Bjorken x is shown, while confirming a strange-quark density similar in size to the up- and down-sea-quark densities in the range x ≲ 0.02 found by previous ATLAS analyses.

Type: Article
Title: Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets
Open access status: An open access version is available from UCL Discovery
DOI: 10.1007/JHEP07(2021)223
Publisher version: https://doi.org/10.1007/JHEP07(2021)223
Language: English
Additional information: © 2021 Springer Nature Switzerland AG. This article is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/).
Keywords: Hadron-Hadron scattering (experiments), QCD
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/10133212
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