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https://hdl.handle.net/2440/102358
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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 1079-7114 |
Statement of Responsibility: | 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 |
DOI: | 10.1103/PhysRevLett.112.231806 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1103/physrevlett.112.231806 |
Appears in Collections: | Aurora harvest 3 Chemistry and Physics publications |
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