DELPHI Collaboration, The and Borissov, Guennadi V. and Sopczak, Andre (2005) Production of Ξ0c and Ξb in Z decays and lifetime measurement of Ξb. European Physical Journal C: Particles and Fields, 44 (3). pp. 299-309. ISSN 1434-6044
Full text not available from this repository.Abstract
The charmed strange baryon Ξ0c was searched for in the decay channel Ξ0c → Ξ−π+, and the beauty strange baryon Ξb in the inclusive channel Ξb → Ξ−−¯νX, using the 3.5 million hadronic Z events collected by the DELPHI experiment in the years 1992–1995. The Ξ− was reconstructed through the decay Ξ− → Λπ−, using a constrained fit method for cascade decays. An iterative discriminant analysis was used for the Ξ0c and Ξb selection. The production rates were measured to be fΞ0c ×BR(Ξ0c → Ξ−π+) = (4.7 ± 1.4(stat.) ± 1.1(syst.)) × 10−4 per hadronic Z decay, and BR(b → Ξb)×BR(Ξb → Ξ−−X) = (3.0 ± 1.0(stat.) ± 0.3(syst.)) × 10−4 for each lepton species (electron or muon). The lifetime of the Ξb baryon was measured to be τΞb = 1.45+0.55 −0.43(stat.) ± 0.13(syst.) ps. A combination with the previous DELPHI lifetime measurement gives τΞb = 1.48+0.40 −0.31(stat.) ± 0.12(syst.) ps.
| Item Type: | Article |
|---|---|
| Journal or Publication Title: | European Physical Journal C: Particles and Fields |
| Additional Information: | Author list is partial - see original article for full author list. |
| Subjects: | Q Science > QC Physics |
| Departments: | Faculty of Science and Technology > Physics |
| ID Code: | 10057 |
| Deposited By: | Ms Margaret Calder |
| Deposited On: | 30 Jun 2008 14:07 |
| Refereed?: | Yes |
| Published?: | Published |
| Last Modified: | 26 Jul 2012 14:43 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/10057 |
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