Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets
AffiliationDepartment of Physics, University of Arizona
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CitationAad, G., Abbott, B., Abbott, D. C., Abed Abud, A., Abeling, K., Abhayasinghe, D. K., Abidi, S. H., AbouZeid, O. S., Abraham, N. L., Abramowicz, H., Abreu, H., Abulaiti, Y., Acharya, B. S., Achkar, B., Adam, L., Adam Bourdarios, C., Adamczyk, L., Adamek, L., Adelman, J., … The ATLAS collaboration. (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, 2021(7).
JournalJournal of High Energy Physics
RightsCopyright © CERN, for the benefit of the ATLAS Collaboration. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0).
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AbstractThis 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 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 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. [Figure not available: see fulltext.] © 2021, The Author(s).
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Except where otherwise noted, this item's license is described as Copyright © CERN, for the benefit of the ATLAS Collaboration. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0).