Measurement of the Forward-Backward Asymmetries of e+e- -> Z -> b bbar and e+e- -> Z -> c cbar using prompt leptons
| dc.creator | The DELPHI Collaboration | |
| dc.creator | Abdallah, J. | |
| dc.date | 2004-03-27 | |
| dc.date.accessioned | 2026-07-07T11:57:50Z | |
| dc.date.available | 2026-07-07T11:57:50Z | |
| dc.description | The forward-backward asymmetries of the processes e+e- -> Z -> b bbar and e+e- -> Z -> c cbar were measured from a sample of hadronic Z decays collected by the DELPHI experiment between 1993 and 1995. Enriched samples of b bbar and c cbar events were obtained using lifetime information. The tagging of b and c quarks in these samples was based on the semileptonic decay channels b/c -> X + mu and b/c -> X + e combined with charge flow information from the hemisphere opposite to the lepton. Combining the A_{FB}^{b bbar} and A_{FB}^{c cbar} measurements presented in this paper with published results based on 1991 and 1992 DELPHI data samples, the following pole asymmetries were obtained: A_{FB}^{0,b} = 0.1021 +/- 0.0052 (stat) +/- 0.0024 (syst) A_{FB}^{0,c} = 0.0728 +/- 0.0086 (stat) +/- 0.0063 (syst) The effective value of the weak mixing angle derived from these measurements is sin^2 theta_{W,eff}^{lept} = 0.23170 +/- 0.00097 . | |
| dc.description | 27 pages, 5 figures, Accepted by Eur. Phys. J. C | |
| dc.identifier | https://arxiv.org/abs/hep-ex/0403041 | |
| dc.identifier | http://arxiv.org/abs/hep-ex/0403041 | |
| dc.identifier | Eur.Phys.J.C34:109-125,2004 | |
| dc.identifier | doi:10.1140/epjc/s2004-01708-6 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/206018 | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Measurement of the Forward-Backward Asymmetries of e+e- -> Z -> b bbar and e+e- -> Z -> c cbar using prompt leptons | |
| dc.type | text |