학술논문
Determination of the parton distribution functions of the proton from ATLAS measurements of differential W± and Z boson production in association with jets
Document Type
Original Paper
Author
Source
Journal of High Energy Physics. 2021(7)
Subject
Language
English
ISSN
1029-8479
Abstract
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 ss = 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 ss = 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.