Measurements of Four-Lepton Production at the Z Resonance in pp Collisions at √s=7 and 8 TeV with ATLAS
| Data(s) |
2014
|
|---|---|
| Resumo |
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 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. |
| Formato |
application/pdf |
| Identificador |
http://boris.unibe.ch/68714/1/PhysRevLett.112231806.pdf Agustoni, Marco; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Gallo, Valentina; Haug, Sigve; Kruker, Tobias; Marti, Lukas; Meloni, Federico; Schneider, Basil; Sciacca, Gianfranco; Stramaglia, Maria; Stucci, Stefania Antonia; Weber, Michael (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(23), p. 231806. American Physical Society 10.1103/PhysRevLett.112.231806 <http://dx.doi.org/10.1103/PhysRevLett.112.231806> doi:10.7892/boris.68714 info:doi:10.1103/PhysRevLett.112.231806 urn:issn:0031-9007 |
| Idioma(s) |
eng |
| Publicador |
American Physical Society |
| Relação |
http://boris.unibe.ch/68714/ |
| Direitos |
info:eu-repo/semantics/openAccess |
| Fonte |
Agustoni, Marco; Beck, Hans Peter; Cervelli, Alberto; Ereditato, Antonio; Gallo, Valentina; Haug, Sigve; Kruker, Tobias; Marti, Lukas; Meloni, Federico; Schneider, Basil; Sciacca, Gianfranco; Stramaglia, Maria; Stucci, Stefania Antonia; Weber, Michael (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(23), p. 231806. American Physical Society 10.1103/PhysRevLett.112.231806 <http://dx.doi.org/10.1103/PhysRevLett.112.231806> |
| Palavras-Chave | #530 Physics |
| Tipo |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed |
