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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

ContributorsATLAS Collaboration
Published inPhysical review letters, vol. 109, no. 01, 012001
Publication date2012
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 Q2=1.9  GeV2 and x=0.023.

Citation (ISO format)
ATLAS Collaboration. Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W -&gt; <em>ℓν</em> and Z -&gt; <em>ℓℓ</em> Cross Sections. In: Physical review letters, 2012, vol. 109, n° 01, p. 012001. doi: 10.1103/PhysRevLett.109.012001
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ISSN of the journal0031-9007
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