In 451000 hadronic Z0 decays, recorded with the ALEPH detector at LEP, the yields of lambda l- and lambdal+ combinations are measured. Semileptonic decays of b baryons result in a signal of 122 +/- 18(stat.)+22/-23(syst.) lambda l- combinations. From a fit to the impact parameter distribution of the leptons in the lambda l- sample, the lifetime of b baryons is measured to be 1.12+0.32/-0.29(stat.) +/- 0.16(syst.) ps.
A Measurement of the B Baryon Lifetime
G. BATIGNANI;CIOCCI, MARIA AGNESE;FERRANTE, ISIDORO;MESSINEO, ALBERTO MARIA;TONELLI, GUIDO EMILIO;G. TRIGGIANI;
1992-01-01
Abstract
In 451000 hadronic Z0 decays, recorded with the ALEPH detector at LEP, the yields of lambda l- and lambdal+ combinations are measured. Semileptonic decays of b baryons result in a signal of 122 +/- 18(stat.)+22/-23(syst.) lambda l- combinations. From a fit to the impact parameter distribution of the leptons in the lambda l- sample, the lifetime of b baryons is measured to be 1.12+0.32/-0.29(stat.) +/- 0.16(syst.) ps.File in questo prodotto:
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