Measurement of the forward $W$ boson cross-section in $pp$ collisions at $\sqrt{s}=7\mathrm{TeV}$

Abstract

A measurement of the inclusive $W\to \mu \nu$ production cross-section using data from $pp$ collisions at a centre-of-mass energy of $\sqrt{s}=7\mathrm{TeV}$ is presented. The analysis is based on an integrated luminosity of about $1.0{\mathrm{fb}}^{-1}$ recorded with the LHCb detector. Results are reported for muons with a transverse momentum greater than $20\mathrm{Ge}\mathrm{V}/c$ and pseudorapidity between 2.0 and 4.5. The $W^{+}$ and $W^{-}$ production cross-sections are measured to be $${\sigma }_{W^{+}\to {\mu }^{+}\nu }=861.0\pm 2.0\pm 11.2\pm 14.7\mathrm{pb},$$ $${\sigma }_{W^{-}\to {\mu }^{-}\overline{\nu }}=675.8\pm 1.9\pm 8.8\pm 11.6\mathrm{pb},$$ where the first uncertainty is statistical, the second is systematic and the third is due to the luminosity determination. Cross-section ratios and differential distributions as functions of the muon pseudorapidity are also presented. The ratio of $W^{+}$ to $W^{-}$ cross-sections in the same fiducial kinematic region is determined to be $$\frac{{\sigma }_{W^{+}\to {\mu }^{+}\nu }}{{\sigma }_{W^{-}\to {\mu }^{-}\overline{\nu }}}=1.274\pm 0.005\pm 0.009,$$ where the uncertainties are statistical and systematic, respectively. Results are in good agreement with theoretical predictions at next-to-next-to-leading order in perturbative quantum chromodynamics.

References in corpus (7)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order
• Precision luminosity measurements at LHCb
• Inclusive $W$ and $Z$ production in the forward region at $\sqrt{s}=7$ TeV
• Measurement of the cross-section for Z->e+e- production in pp collisions at sqrt{s}=7TeV
• Parton Distributions and QCD at LHCb

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