0000000000309691

AUTHOR

R.e. Carney

showing 3 related works from this author

Measurement of the b → τ-ν̄τX branching ratio

1993

The definitions of “anthropology” found in various dictionaries cover a whole range of terms and in this section we provide an overview of all its connotations. In this way a variety of reflections about the essence of man become possible, for instance as : summit of creation; source of his own values; specific biological reality; intelligence (but what is this, really?); knowing subject or object of knowledge; social being and product of a culture. Following these lines of thought one realises that all these preoccupations have already been taken up, or at least touched upon, by communication theory.

PhysicsNuclear and High Energy PhysicsParticle physicsgeographySummitgeography.geographical_feature_categoryE+E ANNIHILATION010308 nuclear & particles physicsSection (typography)Subject (philosophy)Variety (linguistics)01 natural sciencesObject (philosophy)DECAYSCommunication theoryEpistemologyProduct (mathematics)0103 physical sciencesCover (algebra)010306 general physics
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Measurement of the and B− meson lifetimes

1993

Abstract The lifetimes of the B 0 and B − mesons have been measured with the ALEPH detector at LEP. Semileptonic decays of B 0 and B − mesons were partially reconstructed by identifying events containing a lepton with an associated D ∗+ or D 0 meson. The proper time of the B meson was estimated from the measured decay length and the momentum and mass of the D -lepton system. A fit to the proper time of 77 D ∗+ l − and 77 D 0 l − candidates, combined with a constraint on the lifetime ratio ( τ − τ 0 ) arising from the relative rates of observed D ∗+ l − and D 0 l − events, yielded the following lifetimes: τ 0 =1.52 −0.18 +0.20 ( stat. ) −0.13 +0.07 ( syst. ) ps , τ − = 1.47 −0.19 +0.22 ( sta…

Semileptonic decayPhysicsNuclear and High Energy PhysicsParticle physicsMeson010308 nuclear & particles physicsElectron–positron annihilationNuclear TheoryHigh Energy Physics::Phenomenology01 natural sciencesNuclear physicsMomentum0103 physical sciencesDecay lengthProper timeHigh Energy Physics::ExperimentB mesonNuclear Experiment010306 general physicsLepton
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Measurement of the strong coupling constant using τ decays

1993

The strong coupling constant is determined from the leptonic branching ratios, the lifetime, and the invariant mass distribution of the hadronic final state of the tau lepton, using data accumulated at LEP with the ALEPH detector. The strong coupling constant measurement, alpha(s), (m(tau)2) = 0.330 +/-0.046, evolved to the Z mass, yields alpha(s)(M(Z)2) = 0. 1 18 +/- 0.005. The error includes experimental and theoretical uncertainties, the latter evaluated in the framework of the Shifman, Vainshtein and Zakharov (SVZ) approach. The method allows the non-perturbative contribution to the hadronic decay rate to be determined to be 0.3 +/- 0.5% . RI Perrier, Frederic/A-5953-2011; ANTONELLI, AN…

PhysicsCoupling constantNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsElectron–positron annihilationPhysicsknowledge discoveryHigh Energy Physics::PhenomenologyDetectorHadronStrong interaction01 natural sciencesALEPH ExperimentNuclear physics0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]High Energy Physics::ExperimentInvariant massbibliographic databases010306 general physicsALEPH experimentParticle Physics - ExperimentLepton
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