Exclusive and inclusive semileptonic decays of B mesons to D mesons

Journal Article · Fri Feb 01 00:00:00 EST 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.651· OSTI ID:6045668

Fulton, R; Jensen, T; Johnson, D R; Kagan, H; Kass, R; Morrow, F; Whitmore, J; Wilson, P; Bortoletto, D ^[1]; Chen, W; Dominick, J; McIlwain, R L; Miller, D H; Ng, C R; Schaffner, S F; Shibata, E I; Shipsey, I P.J.; Yao, W ^[2]; Battle, M; Sparks, K ; Thorndike, E H; Wang, C ^[3]; Alam, M S; Kim, I J; Li, W C; Romero, V; Sun, C R; Wang, P; Zoeller, M M ^[4]; Goldberg, M; Haupt, T; Horwitz, N; Jain, V; Mestayer, M D; Moneti, G C; Rozen, Y; Rubin, P; Sharma, V; Skwarnicki, T; Thulasidas, M; Zhu, G ^[5]; Csorna, S E; Letson, T ^[6]; Alexander, J; Artuso, M; Bebek, C; Berkelman, K; Browder, T; Cassel, D G; Cheu, E; Coffman, D M; Crawford, G; DeWire, J W; Drell, P S; Ehrlich, R; Galik,

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1. Ohio State University, Columbus, OH (USA)
2. Purdue University, West Lafayette, IN (USA)
3. University of Rochester, Rochester, NY (USA)
4. State University of New York at Albany, Albany, NY (USA)
5. Syracuse University, Syracuse, NY (USA)
6. Vanderbilt University, Nashville, TN (USA)

We report new measurements of the branching fractions {ital B}({ital B}{sup {minus}}{r arrow}{ital D}{sup 0}{ital l{minus}}{bar {nu}}), {ital B}({ital {bar B}}{sup 0}{r arrow}{ital D}{sup +}{ital l{minus}}{bar {nu}}), and {ital B}({ital B}{sup {minus}}{r arrow}{ital D}{sup *0}{ital l{minus}}{bar {nu}}). Combining these results with our previous measurement of {ital B}({ital {bar B}}{sup 0}{r arrow}{ital D}{sup *+}{ital l{minus}}{bar {nu}}), we find that the ratio of semileptonic widths for final states with a vector meson and pseudoscalar meson is (2.6{sub {minus}0.6{minus}0.8}{sup +1.1+1.0}) and the ratio of charged- to neutral-{ital B}-meson lifetimes is (0.89{plus minus}0.19{plus minus}0.13)({ital f}{sub 00}/{ital f}{sub +{minus}}) where ({ital f}{sub 00}/{ital f}{sub +{minus}}) is the ratio of neutral- to charged-{ital B}-meson production at the {Upsilon}(4{ital S}). From the {ital {bar B}}{r arrow}{ital Dl}{sup {minus}}{bar {nu}} branching fraction, we calculate {vert bar}{ital V}{sub {ital c}{ital b}}{vert bar}=0.040{plus minus}0.006 {plus minus}0.006, where the first error is statistical and the second is systematic and dominated by the uncertainty in the {ital B}-meson lifetime.

• OSTI ID: 6045668
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 43:3; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B MESONS
SEMILEPTONIC DECAY
BRANCHING RATIO
D NEUTRAL MESONS
EXPERIMENTAL DATA
LIFETIME
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
DATA
DECAY
ELEMENTARY PARTICLES
HADRONS
INFORMATION
MESONS
NUMERICAL DATA
PARTICLE DECAY
PSEUDOSCALAR MESONS
WEAK PARTICLE DECAY
645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties