Semileptonic decays of B meson into charmed meson

Conference · Fri Dec 15 04:00:00 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--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (USA) Journal Volume: 196:1
• Country of Publication: United States
• Language: English

Related Subjects

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