0000000001249963

AUTHOR

C. Vannini-castaldi

showing 2 related works from this author

Measurement of the B hadron lifetime

1991

The average lifetime of B hadrons has been measured by the ALEPH experiment at LEP. Events containing B hadrons are selected by the identification of leptons with high transverse momentum in hadronic Z decays, and the lifetime is extracted from a fit to the impact parameter distribution of the lepton tracks. From a sample of 1.7×105 hadronic Z decays a lifetime of 1.29±0.06±0.10 ps is measured.

PhysicsNuclear and High Energy PhysicsParticle physicsMesonElectron–positron annihilationHigh Energy Physics::PhenomenologyHadronElementary particleNuclear physicsHigh Energy Physics::ExperimentB mesonImpact parameterNuclear ExperimentALEPH experimentParticle Physics - ExperimentLeptonPhysics Letters B
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Measurement of B- mixing at the Z

1991

Abstract From more than 175 000 hadronic Z decays observed with the ALEPH detector at LEP, we select 823 events with pairs of leptons in the final state. From these we measure χ , the probability thata b hadron which is observed to decay originated as a b hadron. We find χ =0.132 −0.026 +0.027 .

PhysicsNuclear and High Energy PhysicsParticle physicsAlephElectron–positron annihilationHigh Energy Physics::PhenomenologyHadronDecision makerMeasure (mathematics)Nuclear physicsHigh Energy Physics::ExperimentNuclear ExperimentMixing (physics)LeptonPhysics Letters B
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