CERN Accelerating science

Article
Report number arXiv:1010.2130 ; CERN-PH-EP-2010-037 ; CERN-PH-EP-2010-037
Title Measurement of the Wlν and Z/γll production cross sections in proton-proton collisions at s = 7 TeV with the ATLAS detector
Related titleMeasurement of the W -> lnu and Z/gamma* -> ll production cross sections in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector
Author(s) ATLAS Collaboration  Prikaži svih 3179 autora
Affiliation (CERN)
Publication 2010
Imprint 12 Oct 2010
Number of pages 55
Note Comments: 38 pages plus author list (57 pages total), 16 figures, 15 tables
38 pages plus author list (57 pages total), 16 figures, 15 tables
In: JHEP 12 (2010) 060
DOI 10.1007/JHEP12(2010)060
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Abstract First measurements of the W -> lnu and Z/gamma* -> ll (l = e, mu) production cross sections in proton-proton collisions at sqrt(s) = 7 TeV are presented using data recorded by the ATLAS experiment at the LHC. The results are based on 2250 W -> lnu and 179 Z/gamma* -> ll candidate events selected from a data set corresponding to an integrated luminosity of approximately 320 nb-1. The measured total W and Z/gamma*-boson production cross sections times the respective leptonic branching ratios for the combined electron and muon channels are \stotW * BR(W -> lnu) = 9.96 +- 0.23(stat) +- 0.50(syst) +- 1.10(lumi) nb and \stotZg * BR(Z/gamma* -> ll) = 0.82 +- 0.06(stat) +- 0.05(syst) +- 0.09(lumi) nb (within the invariant mass window 66 < m_ll < 116 GeV). The W/Z cross-section ratio is measured to be 11.7 +- 0.9(stat) +- 0.4(syst). In addition, measurements of the W+ and W- production cross sections and of the lepton charge asymmetry are reported. Theoretical predictions based on NNLO QCD calculations are found to agree with the measurements.
Copyright/License preprint: © 2010-2024 CERN (License: CC-BY-3.0)
publication: © 2010-2024 CERN (License: CC-BY-3.0)



Corresponding record in: Inspire
Email contact: giuseppe.iacobucci@cern.ch


 Zapis kreiran 2010-10-12, zadnja izmjena 2024-03-14


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