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

Document type: Articulo

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.

Notes

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General information

Issue date: 2014
Document language: English
Journal: Physical Review Letters; vol. 112, no. 23
Origin: Facultad de Ciencias Exactas; Instituto de Física La Plata
Others identifiers: eid:2-s2.0-84902440821
ISSN: 0031-9007
xmlui.dri2xhtml.METS-1.0.item-dc-subject: proton-proton collisions ; ATLAS detector ; Four-Lepton Production
Subjects: Ciencias Exactas ; Física

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Created: 7 de noviembre de 2019
Available since: 7 de noviembre de 2019
Please, use one of this identificators(URI) for cite o linking this item:
  • http://sedici.unlp.edu.ar/handle/10915/85175
  • https://doi.org/10.1103/PhysRevLett.112.231806

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