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

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Cited by in corpus (35)

• The Large Hadron-Electron Collider at the HL-LHC
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• 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
• CTEQ-TEA parton distribution functions and HERA Run I and II combined data
• NNLO nuclear parton distribution functions with electroweak-boson production data from the LHC
• Strange sea determination from collider data
• The Quark and Gluon Structure of the Proton
• Measurements of top-quark pair to $Z$-boson cross-section ratios at $\sqrt{s}=13,8,7$TeV with the ATLAS detector
• Charm jets as a probe for strangeness at the future Electron-Ion Collider
• 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
• The photon PDF determination within the xFitter framework
• The photon PDF from high-mass Drell Yan data at the LHC using xFitter
• Probing the Sea Quark Content of the Proton with One-Particle-Inclusive Processes
• Measurements of $W$ and $Z/{\gamma }^{\ast }$ cross sections and their ratios in $p+p$ collisions at RHIC
• Constraining nucleon strangeness
• Strong Interaction Physics at the Luminosity Frontier with 22 GeV Electrons at Jefferson Lab
• Limits on contact interactions and leptoquarks at HERA
• Vector Bosons and Jets in Proton Collisions
• 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
• Implementation of target mass corrections and higher-twist effects in the xFitter framework
• LHC data and the proton strangeness
• Proton structure at the LHC
• Electroweak Measurements with the ATLAS and CMS Experiments
• Nucleon PDF separation with the collider and fixed-target data
• The Forward Physics Facility at the High-Luminosity LHC
• Progress in the dynamical parton distributions
• 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
• Reinterpretation of proton strangeness between ATLAS and CMS measurements
• Physics potential of precision measurements of the LHC luminosity