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Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W→ℓν and Z→ℓℓ Cross Sections

Author(s)
Taylor, Frank E.
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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.
Date issued
2012-07
URI
http://hdl.handle.net/1721.1/73509
Department
Massachusetts Institute of Technology. Department of Physics
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
ISSN
0031-9007
1079-7114

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