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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

CollaborationWith : Abdelalim Aly, Ahmed Aly / Alexandre, Gauthier / Backes, Moritz / Barone, Gaetano / Bell, Paul / Bell, William / Benhar Noccioli, Eleonora / Blondel, Alain / Bucci, Francesca / Clark, Allan Geoffrey / Dao, Valerio / Doglioni, Caterina / Ferrere, Didier / Gadomski, Szymon / Gonzalez Sevilla, Sergio / Goulette, Marc / Iacobucci, Giuseppe / La Rosa, Alessandro / Leger, Annie / Lister, Alison / Martin Dit Latour, Bertrand / Mermod, Philippe / Mora Herrera, Maria Clemencia Rosario / Nektarijevic, Snezana / Nikolics, Katalin / Pasztor, Arpad / Picazio, Attilio / Pohl, Martin / Rosbach, Kilian / Rosselet, Laurent / Wu, Xin
Published in Physical Review Letters. 2012, vol. 109, no. 01, p. 012001
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.
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ATLAS COLLABORATION. Determination of the Strange-Quark Density of the Proton from ATLAS Measurements of the W -> ℓν and Z -> ℓℓ Cross Sections. In: Physical Review Letters, 2012, vol. 109, n° 01, p. 012001. https://archive-ouverte.unige.ch/unige:40200

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Deposited on : 2014-09-12

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