Exclusive and inclusive semileptonic decays of B mesons to D mesons

• Published in: Physical review. D, Particles and fields Particles and fields, 1991-02, Vol.43 (3), p.651-663
• Main Authors: Fulton, R, Jensen, T, Johnson, DR, Kagan, H, Kass, R, Morrow, F, Whitmore, J, Wilson, P, Bortoletto, D, Chen, W, Dominick, J, McIlwain, RL, Miller, DH, Ng, CR, Schaffner, SF, Shibata, EI, Shipsey, IP, Yao, W, Battle, M, Sparks, K, Thorndike, EH, Wang, C, Alam, MS, Kim, IJ, Li, WC, Romero, V, V, Sun, CR, Wang, P, Zoeller, MM, Goldberg, M, Haupt, T, Horwitz, N, Jain, V, V, Mestayer, MD, Moneti, GC, Rozen, Y, Rubin, P, Sharma, V, V, Skwarnicki, T, Thulasidas, M, Zhu, G, Csorna, SE, Letson, T, Alexander, J, Artuso, M, Bebek, C, Berkelman, K, Browder, T, Cassel, DG, Cheu, E, Coffman, DM, Crawford, G, DeWire, JW, Drell, PS, Ehrlich, R, Galik, RS, Garcia-Sciveres, M, Geiser, B, Gittelman, B, Gray, SW, Halling, AM, Hartill, DL, Heltsley, BK, Honscheid, K
• Format: Article
• Language: English
• Subjects: 645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties; B MESONS; BOSONS; BRANCHING RATIO; CHARM PARTICLES; CHARMED MESONS; D MESONS; D NEUTRAL MESONS; DATA; DECAY; ELEMENTARY PARTICLES; EXPERIMENTAL DATA; HADRONS; INFORMATION; LIFETIME; MESONS; NUMERICAL DATA; PARTICLE DECAY; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PSEUDOSCALAR MESONS; SEMILEPTONIC DECAY; WEAK PARTICLE DECAY
• ISSN: 0556-2821; 1089-4918
• DOI: 10.1103/PhysRevD.43.651

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.