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Measurement of inclusive B semileptonic branching fractions at the Z resonance
This document presents a new measurement of inclusive b semileptonic branching fractions Bb→l and B&parl0;b→c→l&parr0; . The b→l and b→c→l are separated by a means that uses correlation between the final state lepton charge and that of its parent b quark as a constraint. Monte Carlo counts of electrons and muons are calibrated to the data using a newly developed technique based on pairs of mutually independent tests for each particle hypothesis separately. The data sample consists of about 550,000 hadronic Z decays collected at the SLD between 1993 and 1998. Upon analysis of electron and muon counts in 61602 hadronic event hemispheres tagged as containing either a b or a b¯, we report Bb→e=0.0 949±0.0049±0.0050 Bb→m =0.1066±0.0038±0.0049 combinedB b→l=0.1015±0.0 030±0.0035 Bb→c→e =0.0811±0.0053±0.0030 Bb→c→m =0.0717±0.0045±0.0024 combinedB b→c→l=0.0756± 0.0034±0.0019. ^
Physics, Elementary Particles and High Energy
"Measurement of inclusive B semileptonic branching fractions at the Z resonance"
(January 1, 2000).
Electronic Doctoral Dissertations for UMass Amherst.