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 ORCID: 0000-0002-2788-3822, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL, Abramowicz, H
et al (show 2815 more authors) (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, 07 (7). 223-.

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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 $\sqrt{s} = 8~\mathrm{TeV}$ performed by the ATLAS experiment at the LHC with integrated luminosities of $20.2~\mathrm{fb}^{-1}$ and $19.9~\mathrm{fb}^{-1}$, respectively. The analysis also considers the ATLAS measurements of differential $W^{\pm}$ and $Z$ boson production at $\sqrt{s} = 7~\mathrm{TeV}$ with an integrated luminosity of $4.6~\mathrm{fb}^{-1}$ and deep-inelastic-scattering data from $e^{\pm}p$ 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 $x \lesssim 0.02$ found by previous ATLAS analyses.

Item Type: Article
Additional Information: 43 pages in total, author list starts page 28, 11 figures, 4 tables. Published in JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2019-18
Uncontrolled Keywords: Hadron-Hadron scattering (experiments), QCD
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 31 Aug 2021 08:17
Last Modified: 18 Jan 2023 21:30
DOI: 10.1007/JHEP07(2021)223
Open Access URL: https://link.springer.com/article/10.1007%2FJHEP07...
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URI: https://livrepository.liverpool.ac.uk/id/eprint/3135314