0000000000460514

AUTHOR

Z. D. Thomé

showing 2 related works from this author

J / psi production in the hadronic decays of the Z.

1994

Abstract: J/psi mesons have been reconstructed from their decay to mu(+)mu(-) and e(+)e(-), using the data collected by the DELPHI experiment during 1991 and 1992 at the LEP collider. From about 1 million hadronic Z decays 153 +/- 17 J/psi were found, 5.4 +/- 2.3 psi' were obtained in the channel J/psi(--> mu(+)mu(-))pi(+)pi(-) and 6.4 +/- 2.7 chi(c) in the channel J/psi(--> mu(+)mu(-))gamma. As the dominant source of J/psi mesons is from b quarks, the following branching ratios: Br(b-->J/psi X) = (1.12 +/- 0.12 (stat.) +/- 0.10 (syst.))%, Br(b --> psi' X) = (0.48 +/- 0.22 (stat.) +/- 0.10 (syst.))%, Br(b-->chi(cl) X) = (1.4 +/- 0.6 (stat.)(-0.2)(+0.4) (syst.))% were measured. From the prop…

Nuclear and High Energy PhysicsParticle physicsMesonLUND MONTE-CARLO; B-MESON DECAYS; HEAVY-QUARKONIUM; JET FRAGMENTATION; TRANSITIONS; CHARMONIUM; PHYSICS; SYSTEMS; BOSONLUND MONTE-CARLOElectron–positron annihilationHadronTRANSITIONSAstrophysics::Cosmology and Extragalactic AstrophysicsB meson01 natural sciencesb taggingJET FRAGMENTATIONPartícules (Física nuclear)law.inventionNuclear physicsPHYSICSB-MESON DECAYSlawSYSTEMSCHARMONIUM0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]B mesonNuclear Experiment010306 general physicsColliderBosonDELPHIHEAVY-QUARKONIUMPhysics010308 nuclear & particles physicsPhysicsHigh Energy Physics::PhenomenologyZ0 decayBOSONb-taggingHigh Energy Physics::ExperimentDELPHI; B meson; b tagging; Z0 decayParticle Physics - Experiment
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Advances in Technology for High-Energy Subnuclear Physics. Contribution of the LAA Project.

1990

PhysicsHigh energy[PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]010308 nuclear & particles physics0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]General Physics and Astronomy010306 general physics01 natural sciencesEngineering physics
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