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Measurements of four-lepton production at Z resonance in pp collisions at √s=7 and 8 TeV with ATLAS

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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 mℓ+ℓ−>5 GeV and 80<m4ℓ<100 GeV, the measured cross sections are 76±18(stat)±4(syst)±1.4...

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Main Authors: Aad, Georges (Author) , Anders, Christoph (Author) , Andrei, George Victor (Author) , Brandt, Oleg (Author) , Colombo, Tommaso (Author) , Davygora, Yuriy (Author) , Dietzsch, Thorsten (Author) , Dunford, Monica (Author) , Giulini, Maddalena (Author) , Hanke, Paul (Author) , Jongmanns, Jan (Author) , Kasieczka, Gregor (Author) , Khomich, Andrei (Author) , Kluge, Eike-Erik (Author) , Kretz, Moritz (Author) , Kugel, Andreas (Author) , Laier, Heiko (Author) , Lang, Valerie (Author) , Meier, Karlheinz (Author) , Müller, Felix (Author) , Narayan, Rohin T. (Author) , Poddar, Sahill (Author) , Schätzel, Sebastian (Author) , Scharf, Veit (Author) , Schmitt, Sebastian (Author) , Schöning, André (Author) , Schultz-Coulon, Hans-Christian (Author) , Stamen, Rainer (Author) , Wessels, Martin (Author)
Corporate Author: ATLAS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 13 June 2014
In: Physical review letters
Year: 2014, Volume: 112, Issue: 23
ISSN:1079-7114
DOI:10.1103/PhysRevLett.112.231806
Online Access:lizenzpflichtig
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Author Notes:G. Aad et al. (ATLAS Collaboration); G. Aad, C.F. Anders, V. Andrei, O. Brandt, T. Colombo, Y. Davygora, T.A. Dietzsch, M.Dunford, M. Giulini, P. Hanke, J. Jongmanns, G. Kasieczka, A. Khomich, E.-E. Kluge, M. Kretz, A. Kugel, H. Laier, V.S. Lang, K. Meier, F. Mueller, R. Narayan, s. Poddar, S. Schaetzel, V. Scharf, S. Schmitt, A. Schoening, H.-C. Schultz-Coulon, R. Stamen, M. Wessels und weitere 2869
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Summary: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 mℓ+ℓ−>5 GeV and 80<m4ℓ<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 √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.
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Physical Description:Online Resource
ISSN:1079-7114
DOI:10.1103/PhysRevLett.112.231806

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