Search results for "B-HADRONS"

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MEASUREMENT OF THE GAMMA(B-B-OVER-BAR)/GAMMA(HAD) BRANCHING RATIO OF THE Z BY DOUBLE HEMISPHERE TAGGING

1995

Two measurements of {Mathematical expression} are presented. Both measurements use 250000 Z decays taken with the DELPHI detector in 1991 and rely mainly on the precision of the microvertex detector. One tagging method is as simple as possible so that background rates can be reliably predicted by simulation. The other one uses a more involved tagging technique and reduces the dependence on simulation as much as possible. Combining both results, {Mathematical expression} is found to be 0.2209±0.0041(stat.)±0.0042(syst.)±0.0018 {Mathematical expression}. © 1995 Springer-Verlag.

Particle physicsPhysics and Astronomy (miscellaneous)LUND MONTE-CARLOB-HADRONSElectron–positron annihilationHadronElementary particle01 natural sciencesPartícules (Física nuclear)b taggingJET FRAGMENTATIONNuclear physics0103 physical sciences[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]010306 general physicsEngineering (miscellaneous)Detectors de radiacióDELPHIPhysicsE+E-PHYSICS010308 nuclear & particles physicsBranching fractionDetectormicrovertex detectorLUND MONTE-CARLO; JET FRAGMENTATION; HADRONIC DECAYS; E+E-PHYSICS; B-HADRONSb-taggingParticle accelerationDELPHI; microvertex detector; b taggingHADRONIC DECAYSParticle Physics - Experiment
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