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https://hdl.handle.net/1822/31781| Título: | Measurements of Four-Lepton Production at the Z Resonance in pp Collisions at s√=7 and 8 TeV with ATLAS |
| Autor(es): | Onofre, A. Castro, Nuno Filipe Silva Fernandes ATLAS Collaboration |
| Data: | 2014 |
| Editora: | American Physical Society |
| Revista: | Physical Review Letters |
| Citação: | Aad, G., Abbott, B., Abdallah, J., Khalek, S. A., Abdinov, O., Aben, R., . . . Collaboration, A. (2014). Measurements of Four-Lepton Production at the Z Resonance in pp Collisions at root s=7 and 8 TeV with ATLAS. Physical Review Letters, 112(23). doi: 10.1103/PhysRevLett.112.231806 |
| Resumo(s): | 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. |
| Tipo: | Artigo |
| URI: | https://hdl.handle.net/1822/31781 |
| DOI: | 10.1103/PhysRevLett.112.231806 |
| ISSN: | 0031-9007 1079-7114 |
| Arbitragem científica: | yes |
| Acesso: | Acesso aberto |
| Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
| Ficheiro | Descrição | Tamanho | Formato | |
|---|---|---|---|---|
| 1403.5657.pdf | 670,11 kB | Adobe PDF | Ver/Abrir |
