0000000000640635

AUTHOR

P Comas-illas

showing 2 related works from this author

Search for a very light CP-odd neutral Higgs boson of the MSSM

1992

Abstract The reactions e + e − → hZ ∗ and e + e − → hA have been used to search for the neutral Higgs bosons h and A of the MSSM in the case where the CP -odd A is lighter than 2 m μ , taking into account the large h → AA decay branching ratio. No signal was found in the data sample collected until the end of 1991 by the ALEPH experiment at LEP. For tan β ⩾, m A m μ is excluded at 95% CL for any m h .

PhysicsNuclear physicsNuclear and High Energy PhysicsParticle physicsBranching fractionHiggs bosonLEPALEPH experimentParticle Physics - ExperimentBoson
researchProduct

Updated measurement of the average b hadron lifetime

1992

An improved measurement of the average lifetime of b hadrons has been performed with the ALEPH detector. From a sample of 260000 hadronic Z0 decays, recorded during the 1991 LEP run with the silicon vertex detector fully operational, a fit to the impact parameter distribution of lepton tracks coming from semileptonic decays yields an average b hadron lifetime of 1.49 +/- 0.03 +/- 0.06 ps.

PhysicsNuclear and High Energy PhysicsAlephParticle physicsElectron–positron annihilationDetectorHadronHigh Energy Physics::PhenomenologySilicon vertex detectorALEPH detectorNuclear physicsHigh Energy Physics::ExperimentImpact parameterParticle Physics - ExperimentLepton
researchProduct