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Type: Journal article
Title: Measurements of four-lepton production at the Z resonance in pp collisions at √s = 7 and 8 TeV with ATLAS
Other Titles: Measurements of four-lepton production at the Z resonance in pp collisions at root s = 7 and 8 TeV with ATLAS
Author: Aad, G.
ATLAS Collaboration
Citation: Physical Review Letters, 2014; 112(23):231806-1-231806-18
Publisher: American Physical Society
Issue Date: 2014
ISSN: 0031-9007
Statement of
G. Aad … P. Jackson … L. Lee … A. Petridis … N. Soni … M. White .. The ATLAS Collaboration
Abstract: Measurements of four-lepton (4ℓ, ℓ=e,μ) production cross sections at the Z resonance in pp collisions at the LHC with the ATLAS detector are presented. For dilepton and four-lepton invariant mass regions m(ℓ+ℓ(-)) > 5 GeV and 80<m(4ℓ) < 100 GeV, the measured cross sections are 76 ± 18(stat) ± 4(syst) ± 1.4(lumi) fb and 107 ± 9(stat) ± 4(syst) ± 3.0(lumi) fb at sqrt[s] = 7 and 8 TeV, respectively. By subtracting the nonresonant 4ℓ production contributions and normalizing with Z → μ(+)μ(-) events, the branching fraction for the Z boson decay to 4ℓ is determined to be (3.20 ± 0.25(stat) ± 0.13(syst)) × 10(-6), consistent with the standard model prediction.
Keywords: ATLAS Collaboration
Rights: © 2014 CERN, for the ATLAS Collaboration
RMID: 0030013041
DOI: 10.1103/PhysRevLett.112.231806
Appears in Collections:Chemistry and Physics publications

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