Determination of the strange-quark density of the proton from ATLAS measurements of the W → ℓν and Z → ℓℓ cross sections

Aad, G.ATLAS Collaboration,2016-10-192016-10-192012Physical Review Letters, 2012; 109(1):012001-1-012001-171079-71141079-7114http://hdl.handle.net/2440/101924A QCD analysis is reported of ATLAS data on inclusive W± and Z boson production in pp collisions at the LHC, jointly with ep deep-inelastic scattering data from HERA. The ATLAS data exhibit sensitivity to the light quark sea composition and magnitude at Bjorken x∼0.01. Specifically, the data support the hypothesis of a symmetric composition of the light quark sea at low x. The ratio of the strange-to-down sea quark distributions is determined to be 1.00+0.25−0.28 at absolute four-momentum transfer squared Q2=1.9 GeV2 and x=0.023.en© 2012 CERN, for the ATLAS Collaboration.Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.ATLAS CollaborationDetermination of the strange-quark density of the proton from ATLAS measurements of the W → ℓν and Z → ℓℓ cross sectionsDetermination of the strange-quark density of the proton from ATLAS measurements of the W -> l nu and Z -> l l cross sectionsJournal article002013267210.1103/PhysRevLett.109.0120010003063234000022-s2.0-8486371093217499