Semileptonic decays of B meson into charmed meson

Conference · Fri Dec 15 00:00:00 EST 1989 · AIP Conference Proceedings (American Institute of Physics); (USA)

OSTI ID:7023395

Katayama, N ^[1]

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1. Laboratory of Nuclear Study, Cornell University, Ithaca, N.Y. 14853 (US)

Recent results on semileptonic decays of {ital B} meson into charmed meson using the CLEO detector at CESR are summarized. Ratios of the inclusive semileptonic branching fractions, B(B{sup {minus}}{r arrow}{ital D}{sup 0}{ital Xl}{sup {minus}}{bar {nu}}), B({ital {bar B}}{sup 0}{r arrow}{ital D}{sup +}{ital Xl}{sup {minus}}{bar {nu}}{ital Xl}{sup {minus}}{bar {nu}}), and B({ital {bar B}}{sup 0}{r arrow}{ital D}{sup +}) average {ital B} meson semileptonic branching fraction are reported. The branching fractions of the exclusive final states, {ital B}{sup {minus}}{r arrow}{ital D}{sup 0}{ital l}{sup {minus}}{bar {nu}}, {ital B}{sup {minus}}{r arrow}{ital D}{sup 0}{ital l}{sup {minus}}{bar {nu}}, and {ital {bar B}}{sup 0}{r arrow}{ital D}{sup +}{ital l}{sup {minus}}{bar {nu}} are measured. The ratio of B({ital B}{sup {minus}}{r arrow}{ital D}{sup 0}{ital l}{sup {minus}}{bar {nu}}) to B(B{sup {minus}}{r arrow}{ital D}{sup 0}{ital l}{sup {minus}}{bar {nu}}) and the polarization of the {ital D}*{sup +} are obtained and compared with theoretical models. The value of {vert bar}{ital V}{sub {ital c}{ital b}}{vert bar} is calculated from the exclusive branching fractions for various models. Finally, the lifetime ratio of the charged and neutral {ital B}'s ({tau}{sup +}/{tau}{sup 0}) is determined from the ratio of B({ital B}{sup {minus}}{r arrow}{ital D}{sup 0}{ital l}{sup {minus}}{bar {nu}}) to B({ital {bar B}}{sup 0}{r arrow}{ital D}{sup +}{ital l}{sup {minus}}{bar {nu}}) to be 0.85{plus minus}0.20{sup +0.22}{sub {minus}0.16}.

• OSTI ID: 7023395
• Report Number(s): CONF-8906204-; CODEN: APCPC; TRN: 90-010745
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (USA), Vol. 196:1; Conference: International symposium on heavy quark physics, Ithaca, NY (USA), 13-17 Jun 1989; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
SEMILEPTONIC DECAY
D MESONS
PARTICLE PRODUCTION
MISSING-MASS SPECTRA
ANGULAR DISTRIBUTION
ANTINEUTRINOS
BRANCHING RATIO
CORNELL 10-GEV SYNCHROTRON
EXPERIMENTAL DATA
KOBAYASHI-MASKAWA MATRIX
LEPTONS
LIFETIME
MONTE CARLO METHOD
ACCELERATORS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
CHARM PARTICLES
CHARMED MESONS
CYCLIC ACCELERATORS
DATA
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
HADRONS
INFORMATION
MASSLESS PARTICLES
MATRICES
MESONS
NEUTRINOS
NUMERICAL DATA
PARTICLE DECAY
PSEUDOSCALAR MESONS
SPECTRA
SYNCHROTRONS
UNIFIED-FIELD THEORIES
WEAK PARTICLE DECAY
645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties
645103 - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties