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Scientific article
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English

Measurement of the production cross section for W-bosons in association with jets in pp collisions at √s=7 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 698, no. 5, p. 325-345
Publication date2011
Abstract

This Letter reports on a first measurement of the inclusive W+jets cross section in proton–proton collisions at a centre-of-mass energy of 7 TeV at the LHC, with the ATLAS detector. Cross sections, in both the electron and muon decay modes of the W-boson, are presented as a function of jet multiplicity and of the transverse momentum of the leading and next-to-leading jets in the event. Measurements are also presented of the ratio of cross sections σ(W+⩾n)/σ(W+⩾n−1) for inclusive jet multiplicities n=1–4. The results, based on an integrated luminosity of 1.3 pb−1, have been corrected for all known detector effects and are quoted in a limited and well-defined range of jet and lepton kinematics. The measured cross sections are compared to particle-level predictions based on perturbative QCD. Next-to-leading order calculations, studied here for n⩽2, are found in good agreement with the data. Leading-order multiparton event generators, normalized to the NNLO total cross section, describe the data well for all measured jet multiplicities.

Keywords
  • W-boson
  • Jets
  • ATLAS
  • LHC
  • Proton–proton
  • 7 TeV
Citation (ISO format)
ATLAS Collaboration. Measurement of the production cross section for <em>W</em>-bosons in association with jets in <em>pp</em> collisions at √s=7 TeV with the ATLAS detector. In: Physics letters. B, 2011, vol. 698, n° 5, p. 325–345. doi: 10.1016/j.physletb.2011.03.012
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ISSN of the journal0370-2693
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