Measurement of the $W$ Charge Asymmetry in the $W\to \mu \nu$ Decay Mode in $pp$ Collisions at $\sqrt{s}=7$ TeV with the ATLAS detector

Abstract

This letter reports a measurement of the muon charge asymmetry from $W$ bosons produced in proton-proton collisions at a centre-of-mass energy of 7 TeV with the ATLAS experiment at the LHC. The asymmetry is measured in the $W\to \mu \nu$ decay mode as a function of the muon pseudorapidity using a data sample corresponding to a total integrated luminosity of 31 pb${}^{-1}$. The results are compared to predictions based on next-to-leading order calculations with various parton distribution functions. This measurement provides information on the $u$ and $d$ quark momentum fractions in the proton.

22 pages in total, author list starting from page 10, 4 figure, 3 tables, final version published in Phys. Lett. B. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2010-16/

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Cited by in corpus (28)

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