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

María Josefina Alconada Verzini; Francisco Alonso; Xabier Sebastián Anduaga; María Teresa Dova; Fernando Gabriel Monticelli; Martín Fernando Tripiana; ATLAS Collaboration

doi:10.1103/PhysRevLett.112.231806

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

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

María Josefina Alconada Verzini, Francisco Alonso, Xabier Sebastián Anduaga, María Teresa Dova, Fernando Gabriel Monticelli, Martín Fernando Tripiana and ATLAS Collaboration

Physical review letters, Vol.112(23), 231806

01/01/2014

DOI: 10.1103/PhysRevLett.112.231806

PMID: 24972200

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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. La lista completa de autores que integran el documento puede consultarse en el archivo. Facultad de Ciencias Exactas Instituto de Física La Plata

Ciencias Exactas

Física

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Title: Subtitle: Measurements of four-lepton production at the Z resonance in pp collisions at √s = 7 and 8 TeV with ATLAS
Creators: María Josefina Alconada Verzini
Francisco Alonso
Xabier Sebastián Anduaga
María Teresa Dova
Fernando Gabriel Monticelli
Martín Fernando Tripiana
ATLAS Collaboration
Contributors: U Mallik (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Physical review letters, Vol.112(23), 231806
DOI: 10.1103/PhysRevLett.112.231806
PMID: 24972200
NLM abbreviation: Phys Rev Lett
ISSN: 0031-9007
eISSN: 1079-7114
Language: English
Date published: 01/01/2014
Academic Unit: Physics and Astronomy
Record Identifier: 9984199698402771

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