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Inclusive $W$ and $Z$ production in the forward region at $\sqrt{s} = 7$ TeV

Abstract

Measurements of inclusive and boson production cross-sections in collisions at TeV using final states containing muons are presented. The data sample corresponds to an integrated luminosity of 37 pb collected with the LHCb detector. The and bosons are reconstructed from muons with a transverse momentum above 20 GeV and pseudorapidity between 2.0 and 4.5, and, in the case of the cross-section, a dimuon invariant mass between 60 and 120 GeV. The cross-sections are measured to be { pb} for , { pb} for and { pb} for , where the first uncertainty is statistical, the second is systematic and the third is due to the luminosity. Differential cross-sections, and cross-section ratios and the lepton charge asymmetry are also measured in the same kinematic region. The ratios are determined to be {}, and {}. The results are in general agreement with theoretical predictions, performed at next-to-next-to-leading order in QCD using recently calculated parton distribution functions.