This letter reports a measurement of the muon charge asymmetry from W bosons produced in proton-proton collisions at a center-of-mass energy of 7 TeV with the ATLAS experiment at the LHC. The asymmetry is measured in the W→μν 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 u and d quark momentum fractions in the proton.
|Original language||English (US)|
|Number of pages||22|
|Journal||Physics Letters B|
|State||Published - 2011|