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Phys. Rev. D 61, 072002 (2000) [6 pages]

Charged track multiplicity in B meson decay

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G. Brandenburg et al. CLEO Collaboration
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Received 8 September 1999; published 7 March 2000

We have used the CLEO II detector to study the multiplicity of charged particles in the decays of B mesons produced at the Υ(4S) resonance. Using a sample of 1.5×106 B meson pairs, we find the mean inclusive charged particle multiplicity to be 10.71±0.02-0.15+0.21 for the decay of the pair. This corresponds to a mean multiplicity of 5.36±0.01-0.08+0.11 for a single B meson. Using the same data sample, we have also extracted the mean multiplicities in semileptonic and nonleptonic decays. We measure a mean of 7.82±0.05-0.19+0.21 charged particles per BB̅ decay when both mesons decay semileptonically. When neither B meson decays semileptonically, we measure a mean charged particle multiplicity of 11.62±0.04-0.18+0.24 per BB̅ pair.

© 2000 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.61.072002
DOI:
10.1103/PhysRevD.61.072002
PACS:
14.40.Nd, 13.20.He, 13.25.Hw