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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
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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

G. Aad, B. Abbott, D.C. Abbott, A. Abed Abud, K. Abeling, D.K. Abhayasinghe, S.H. Abidi, O.S. AbouZeid, N.L. Abraham, H. Abramowicz, …
Journal of High Energy Physics, 卷.2021(7), 223
07/2021

摘要

Hadron-Hadron scattering (experiments) QCD Nuclear and High Energy Physics
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 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.]

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https://doi.org/10.1007/JHEP07(2021)223檢視
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