Production of and in Z decays and lifetime measurement of
The charmed strange baryon was searched for in the decay channel , and the beauty strange baryon in the inclusive channel , using the 3.5 million hadronic Z events collected by the DELPHI experiment in the years 1992-1995. The was reconstructed through the decay , using a constrained fit method for cascade decays. An iterative discriminant analysis was used for the and selection. The production rates were measured to be BR per hadronic Z decay, and BR BR for each lepton species (electron or muon). The lifetime of the baryon was measured to be ps. A combination with the previous DELPHI lifetime measurement gives ps.
© Springer-Verlag, 2005