Inclusive semileptonic branching ratios of b hadrons produced in Z decays |
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Authors: | A Heister |
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Institution: | (1) Physikalisches Institut das RWTH-Aachen, 52056 Aachen, Germany , DE |
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Abstract: | A measurement of the inclusive semileptonic branching ratios of b hadrons produced in Z decay is presented, using four million
hadronic events collected by the ALEPH detector from 1991 to 1995. Electrons and muons are selected opposite to b-tagged hemispheres.
Two different methods are explored to distinguish the contributions from direct and cascade decays to the total lepton yield. One is based on the lepton transverse momentum spectrum, the other makes use of the correlation
between the charge of the lepton and charge estimators built from tracks in the opposite hemisphere of the event. The latter
method reduces the dependence on the modelling of semileptonic b decays. The results obtained by averaging the two techniques
are
Received: 1 August 2001 / Published online: 14 December 2001 |
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Keywords: | |
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