Allbrooke, B M M, Asquith, L, Cerri, A, Chavez Barajas, C A, De Santo, A, Salvatore, F, Santoyo Castillo, I, Suruliz, K, Sutton, M R, Vivarelli, I and The ATLAS Collaboration, et al. (2014) Measurements of four-lepton production at the Z resonance in pp collisions at √s=7 and 8 TeV with ATLAS. Physical Review Letters, 112 (231806). ISSN 0031-9007
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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 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.
Item Type: | Article |
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Schools and Departments: | School of Mathematical and Physical Sciences > Physics and Astronomy |
Research Centres and Groups: | Experimental Particle Physics Research Group |
Subjects: | Q Science > QC Physics |
Depositing User: | Billy Wichaidit |
Date Deposited: | 02 May 2017 12:16 |
Last Modified: | 02 Jul 2019 19:37 |
URI: | http://sro.sussex.ac.uk/id/eprint/67598 |
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📧 Request an updateProject Name | Sussex Project Number | Funder | Funder Ref |
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ATLAS | G0275 | STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL | ST/I006048/1 |