Charged track multiplicity in $B$ meson decay

Brandenburg, G.; Ershov, A.; Gao, Y.S.; Kim, D.Y.J.; Wilson, R.; Browder, T.E.; Li, Y.; Rodriguez, J.L.; Yamamoto, H.; Bergfeld, T.

doi:10.1103/PhysRevD.61.072002

Charged track multiplicity in $B$ meson decay

CLEO

Collaboration

•

G. Brandenburg
(
- Harvard U.
)

Jul, 1999

11 pages

Published in:

Phys.Rev.D 61 (2000) 072002

e-Print:

hep-ex/9907057 [hep-ex]

DOI:

10.1103/PhysRevD.61.072002

Report number:

SLAC-REPRINT-1999-103,
CLNS-99-1626,
CLEO-99-7

Experiments:

CESR-CLEO-II

View in:

datasets

reference search32 citations

Citations per year

Abstract:

We have used the CLEO II detector to study the multiplicity of charged particles in the decays of B mesons produced at the

\Upsilon(4S)

resonance. Using a sample of 1.5 x 10^6 B meson pairs, we find the mean inclusive charged particle multiplicity to be 10.71 +- 0.02 +0.21/-0.15 for the decay of the pair. This corresponds to a mean multiplicity of 5.36 +- 0.01 +0.11/-0.08 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 +0.21/-0.19 charged particles per

B\bar{B}

decay when both mesons decay semileptonically. When neither B meson decays semileptonically, we measure a mean charged particle multiplicity of 11.62 +- 0.04 +0.24/-0.18 per