Simulations of 11 and 22 GeV PVDIS pseudodata indicate potential constraints on low-Q² sin²θ_W and high-x strange quark and d/u PDFs, with strong correlations requiring simultaneous QCD-electroweak analysis.
Determination of the strange quark density of the proton from ATLAS measurements of the W->l nu and Z->ll cross sections
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abstract
A 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 Q^2 = 1.9 GeV^2 and x = 0.023.
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NNLO global fits to HERA and ATLAS data extract ar u > ar d asymmetry in the proton sea and yield a revised Gottfried sum rule.
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Impact of parity-violating deep-inelastic scattering on the weak mixing angle and high-$x$ parton distributions
Simulations of 11 and 22 GeV PVDIS pseudodata indicate potential constraints on low-Q² sin²θ_W and high-x strange quark and d/u PDFs, with strong correlations requiring simultaneous QCD-electroweak analysis.
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Redetermination of proton sea distributions
NNLO global fits to HERA and ATLAS data extract ar u > ar d asymmetry in the proton sea and yield a revised Gottfried sum rule.