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Scientific article
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English

A measurement of the ratio of the W and Z cross sections with exactly one associated jet in pp collisions at √es=7 TeV with ATLAS

ContributorsATLAS Collaboration
Published inPhysics letters. B, vol. 708, no. 4-5, p. 221-240
Publication date2012
Abstract

The ratio of production cross sections of the W and Z bosons with exactly one associated jet is presented as a function of jet transverse momentum threshold. The measurement has been designed to maximise cancellation of experimental and theoretical uncertainties, and is reported both within a particle-level kinematic range corresponding to the detector acceptance and as a total cross-section ratio. Results are obtained with the ATLAS detector at the LHC in pp collisions at a centre-of-mass energy of 7 TeV using an integrated luminosity of 33 pb−1. The results are compared with perturbative leading-order, leading-log, and next-to-leading-order QCD predictions, and are found to agree within experimental and theoretical uncertainties. The ratio is measured for events with a single jet with pT>30 GeVpT>30 GeV to be 8.73±0.30(stat)±0.40(syst)8.73±0.30(stat)±0.40(syst) in the electron channel, and 8.49±0.23(stat)±0.33(syst)8.49±0.23(stat)±0.33(syst) in the muon channel.

Keywords
  • W boson
  • Z boson
  • Standard Model
  • Perturbative QCD
Citation (ISO format)
ATLAS Collaboration. A measurement of the ratio of the <em>W</em> and <em>Z</em> cross sections with exactly one associated jet in <em>pp</em> collisions at √es=7 TeV with ATLAS. In: Physics letters. B, 2012, vol. 708, n° 4-5, p. 221–240. doi: 10.1016/j.physletb.2012.01.042
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ISSN of the journal0370-2693
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