Z boson pair production in e+e- collisions at sqrt(s) = 183 and 189 GeV
| dc.creator | The OPAL collaboration | |
| dc.creator | Abbiendi, G. | |
| dc.date | 2000-03-13 | |
| dc.date.accessioned | 2026-07-07T12:01:29Z | |
| dc.date.available | 2026-07-07T12:01:29Z | |
| dc.description | A study of Z boson pair production in e+e- annihilation at center-of-mass energies near 183 GeV and 189 GeV is reported. Final states containing only leptons, (l+l-l+l- and l+l-nu nubar), quark and lepton pairs, (q qbar l+l-, q qbar nu nubar) and the all-hadronic final state (q qbar q qbar) are considered. In all states with at least one Z boson decaying hadronically, q qbar and b bbar final states are considered separately using lifetime and event-shape tags, thereby improving the cross-section measurement. At sqrt(s) = 189 GeV the Z-pair cross section was measured to be 0.80 (+0.14-0.13, stat.) (+0.06-0.05, syst.) pb, consistent with the Standard Model prediction. At sqrt(s) = 183 GeV the 95% C.L. upper limit is 0.55 pb. Limits on anomalous ZZgamma and ZZZ couplings are derived. | |
| dc.description | 20 pages, 4 figures, submitted to Phys. Lett. B | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0003016 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0003016 | |
| dc.identifier | Phys.Lett.B476:256-272,2000 | |
| dc.identifier | doi:10.1016/S0370-2693(00)00197-0 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/207111 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Z boson pair production in e+e- collisions at sqrt(s) = 183 and 189 GeV | |
| dc.type | text |