A measurement of the ratio of the W and Z cross sections with exactly one associated jet in pp collisions at root s=7 TeV with ATLAS
2012 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 708, no 3-5, 221-240 p.Article in journal (Refereed) Published
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 p(T) > 30 GeV to be 8.73 +/- 0.30(stat) +/- 0.40(syst) in the electron channel, and 8.49 +/- 0.23(stat) +/- 0.33(syst) in the muon channel.
Place, publisher, year, edition, pages
2012. Vol. 708, no 3-5, 221-240 p.
W boson, Z boson, Standard Model, Perturbative QCD
IdentifiersURN: urn:nbn:se:uu:diva-175039DOI: 10.1016/j.physletb.2012.01.042ISI: 000301556500002OAI: oai:DiVA.org:uu-175039DiVA: diva2:529897
With 3017 more authors from the ATLAS Collaboration.2012-05-312012-05-312012-05-31Bibliographically approved