Determination of the strange quark density of the proton from ATLAS measurements of the W->l nu and Z->ll cross sections

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.

4 pages plus author list (18 pages total), 3 figures, revised author list, matches published PRL version

References in corpus (8)

• Parton distributions for the LHC
• New parton distributions for collider physics
• Vector boson production at hadron colliders: a fully exclusive QCD calculation at NNLO
• MCFM for the Tevatron and the LHC
• QCDNUM: Fast QCD Evolution and Convolution
• Heavy-quark mass dependence in global PDF analyses and 3- and 4-flavour parton distributions
• Measurement of Parton Distributions of Strange Quarks in the Nucleon from Charged-Kaon Production in Deep-Inelastic Scattering on the Deuteron
• Direct Measurement of the $W$ Production Charge Asymmetry in $\ppbar$ Collisions at $\sqrt{s}=1.96$ TeV

Cited by in corpus (19)

• Study of Monte Carlo approach to experimental uncertainty propagation with MSTW 2008 PDFs
• Constraints on parton distribution functions and extraction of the strong coupling constant from the inclusive jet cross section in pp collisions at sqrt(s) = 7 TeV
• Extended Parameterisations for MSTW PDFs and their effect on Lepton Charge Asymmetry from W Decays
• Determination of Strange Sea Quark Distributions from Fixed-target and Collider Data
• Flavor Structure of the Nucleon Sea
• Measurement of the low-mass Drell-Yan differential cross section at $\sqrt{s}$ = 7 TeV using the ATLAS detector
• The Quark and Gluon Structure of the Proton
• Simultaneous measurements of the $t\bar{t}$, $W^{+}{W}^{-}$, and $Z/{\gamma }^{\ast }\to \tau \tau$ production cross-sections in $pp$ collisions at $\sqrt{s}=7$ TeV with the ATLAS detector
• Constraining nucleon strangeness
• Review of single vector boson production in pp collisions at $\sqrt{s}=7$ TeV
• Progress in CTEQ-TEA PDF analysis
• Parton distribution functions at LO, NLO and NNLO with correlated uncertainties between orders
• LHC data and the proton strangeness
• Proton structure at the LHC
• Nucleon PDF separation with the collider and fixed-target data
• Progress in the dynamical parton distributions
• Electroweak Measurements with the ATLAS and CMS Experiments
• Physics potential of precision measurements of the LHC luminosity
• Comments on: "Measurement of Parton Distributions of Strange Quarks in the Nucleon from Charged-Kaon Production in Deep-Inelastic Scattering on the Deuteron" by the HERMES Collaboration