U.S. Department of EnergyOffice of Scientific and Technical Information
Measurement of the and Production Cross Sections in Proton-Proton Collisions at TeV with the ATLAS Detector
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 sigma_W^tot * BR(W -> lnu) = 9.96 +- 0.23(stat) +- 0.50(syst) +- 1.10(lumi) nb and sigma_Z/gamma*^tot * 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. Numerical values supplied by M Vincter.
- Authors:
-
- OSTI
- Publication Date:
- Research Org.:
- USDOE Office of Science (SC) (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Collaborations:
- The ATLAS collaboration; The ATLAS collaboration
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
- OSTI Identifier:
- 1889810
- DOI:
- https://doi.org/10.17182/hepdata.56744
Citation Formats
Aad, G. Measurement of the W → ℓ ν and Z / γ ∗ → ℓ ℓ Production Cross Sections in Proton-Proton Collisions at s = 7 TeV with the ATLAS Detector. United States: N. p., 2010.
Web. doi:10.17182/hepdata.56744.
Aad, G. Measurement of the W → ℓ ν and Z / γ ∗ → ℓ ℓ Production Cross Sections in Proton-Proton Collisions at s = 7 TeV with the ATLAS Detector. United States. doi:https://doi.org/10.17182/hepdata.56744
Aad, G. 2010.
"Measurement of the W → ℓ ν and Z / γ ∗ → ℓ ℓ Production Cross Sections in Proton-Proton Collisions at s = 7 TeV with the ATLAS Detector". United States. doi:https://doi.org/10.17182/hepdata.56744. https://www.osti.gov/servlets/purl/1889810. Pub date:Fri Oct 01 04:00:00 UTC 2010
@article{osti_1889810,
title = {Measurement of the W → ℓ ν and Z / γ ∗ → ℓ ℓ Production Cross Sections in Proton-Proton Collisions at s = 7 TeV with the ATLAS Detector},
author = {Aad, G.},
abstractNote = {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 sigma_W^tot * BR(W -> lnu) = 9.96 +- 0.23(stat) +- 0.50(syst) +- 1.10(lumi) nb and sigma_Z/gamma*^tot * 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. Numerical values supplied by M Vincter.},
doi = {10.17182/hepdata.56744},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Oct 01 04:00:00 UTC 2010},
month = {Fri Oct 01 04:00:00 UTC 2010}
}