Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W→ℓν and Z→ℓℓ Cross Sections
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Aad-2012-Determination of the Strange-Quark Density of.pdf
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Author(s)
Taylor, Frank E.
Date Issued
July 2012
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aad, G. et al. “Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W→ℓν and Z→ℓℓ Cross Sections.” Physical Review Letters 109.1 (2012): 012001.
Version
Final published version
Abstract
A QCD analysis is reported of ATLAS data on inclusive W[superscript ±] 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[subscript -0.28][superscript +0.25] at absolute four-momentum transfer squared Q[superscript 2]=1.9 GeV[superscript 2] and x=0.023.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.109.012001
