0000000000765425

AUTHOR

S. Salomone

showing 2 related works from this author

Inclusive π±, K± and(p,p¯) differential cross-sections at the Z resonance

1995

Inclusive π±, K± and $$(p,\bar p)$$ differential cross-sections in hadronic decays of the Z have been measured as a function ofz=P hadron/P beam, the scaled momentum. The results are based on approximately 520 000 events measured by the ALEPH detector at LEP during 1992. Charged particles are identified by their rate of ionization energy loss in the ALEPH Time Projection Chamber. The position, ξ*, of the peak in the ln(1/z) distribution is determined, and the evolution of the peak position with centre-of-mass energy is compared with the prediction of QCD.

Quantum chromodynamicsPhysicsParticle physicsTime projection chamberPhysics and Astronomy (miscellaneous)Electron–positron annihilationHigh Energy Physics::PhenomenologyHadronResonance (particle physics)Charged particleNuclear physicsMomentumALEPH ExperimentHigh Energy Physics::ExperimentEngineering (miscellaneous)ALEPH experiment
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Measurement of the branching ratio and an upper limit on

1995

Abstract Using 1.45 million hadronic Z decays collected by the ALEPH experiment at LEP, the b → τ − ν - τ X branching ratio is measured to be 2.75 ± 0.30 ± 0.37%. In addition an upper limit of 1.8 × 10 −3 at 90% confidence level is placed upon the exclusive branching ratio of B − → τ − ν - τ . These measurements are consistent with SM expectations, and put the constraint tan β M h ± GeV −1 at 90% confidence level on all Type II two Higgs doublet models (such as the MSSM).

ALEPH ExperimentNuclear physicsPhysicsNuclear and High Energy PhysicsBranching fractionElectron–positron annihilationHadronHiggs bosonLimit (mathematics)SupersymmetryALEPH experimentPhysics Letters B
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