Measurement of the B^¯→D*lν^¯ branching fractions and ‖V_cb‖

Barish, B. et al. (1995) Measurement of the B^¯→D*lν^¯ branching fractions and ‖V_cb‖. Physical Review D, 51(3), pp. 1014-1033. (doi: 10.1103/PhysRevD.51.1014)

Abstract

We study the exclusive semileptonic B meson decays B^-→D*⁰l^-ν^¯ and B^¯0→D*⁺l^-ν^¯ using data collected with the CLEO II detector at the Cornell Electron-positron Storage Ring (CESR). We present measurements of the branching fractions scrB(B^¯0→D*⁺l^-ν^¯)= (0.5/f₀₀)[4.49±0.32(stat.)±0.39 (syst.)]% and scrB(B^-→D*⁰l^-(ν^¯)= (0.5/f_+-)[5.13±0.54 (stat)±0.64 (syst)]%, where f₀₀ and f_+- are the neutral and charged B meson production fractions at the Υ(4S) resonance, respectively. Assuming isospin invariance and taking the ratio of charged to neutral B meson lifetimes measured at higher energy machines, we determine the ratio f_+-/f₀₀=1.04±0.13 (stat) ±0.12 (syst) ±0.10 (lifetime); further assuming f_+-+f₀₀=1 we also determine the partial width Γ(B^¯→D*lν^¯)=[29.9±1.9 (stat)±2.7 (syst.)±2.0 (lifetime)] ns^-1 (independent of f_+-/f₀₀).

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Britton, Professor David
• Authors: Barish, B., Chadha, M., Chan, S., Cowen, D., Eigen, G., Miller, J., O’Grady, C., Urheim, J., Weinstein, A., Acosta, D., Athanas, M., Masek, G., Paar, H., Gronberg, J., Kutschke, R., Menary, S., Morrison, R., Nakanishi, S., Nelson, H., Nelson, T., Qiao, C., Richman, J., Ryd, A., Tajima, H., Sperka, D., Witherell, M., Procario, M., Balest, R., Cho, K., Daoudi, M., Ford, W., Johnson, D., Lingel, K., Lohner, M., Rankin, P., Smith, J., Alexander, J., Bebek, C., Berkelman, K., Bloom, K., Browder, T., Cassel, D., Cho, H., Coffman, D., Crowcroft, D., Drell, P., Ehrlich, R., Gaidarev, P., Galik, R., Garcia-Sciveres, M., Geiser, B., Gittelman, B., Gray, S., Hartill, D., Heltsley, B., Jones, C., Jones, S., Kandaswamy, J., Katayama, N., Kim, P., Kreinick, D., Ludwig, G., Masui, J., Mevissen, J., Mistry, N., Ng, C., Nordberg, E., Patterson, J., Peterson, D., Riley, D., Salman, S., Sapper, M., Würthwein, F., Avery, P., Freyberger, A., Rodriguez, J., Yang, S., Yelton, J., Cinabro, D., Henderson, S., Liu, T., Saulnier, M., Wilson, R., Yamamoto, H., Bergfeld, T., Eisenstein, B., Gollin, G., Ong, B., Palmer, M., Selen, M., Thaler, J., Edwards, K., Ogg, M., Bellerive, A., Britton, D., Hyatt, E., MacFarlane, D., Patel, P., Spaan, B., Sadoff, A., Ammar, R., Ball, S., Baringer, P., Bean, A., Besson, D., Coppage, D., Copty, N., Davis, R., Hancock, N., Kelly, M., Kotov, S., Kravchenko, I., Kwak, N., Lam, H., Kubota, Y., Lattery, M., Momayezi, M., Nelson, J., Patton, S., Perticone, D., Poling, R., Savinov, V., Schrenk, S., Wang, R., Alam, M., Kim, I., Nemati, B., Ling, Z., O’Neill, J., Severini, H., Sun, C., Wappler, F., Crawford, G., Daubenmier, C., Fulton, R., Fujino, D., Gan, K., Honscheid, K., Kagan, H., Kass, R., Lee, J., Malchow, R., Skovpen, Y., Sung, M., White, C., Zoeller, M., Butler, F., Fu, X., Kalbfleisch, G., Ross, W., Skubic, P., Wood, M., Fast, J., McIlwain, R., Miao, T., Miller, D., Modesitt, M., Payne, D., Shibata, E., Shipsey, I., Wang, P., Battle, M., Ernst, J., Gibbons, L., Kwon, Y., Roberts, S., Thorndike, E., Wang, C., Dominick, J., Lambrecht, M., Sanghera, S., Shelkov, V., Skwarnicki, T., Stroynowski, R., Volobouev, I., Wei, G., Zadorozhny, P., Artuso, M., Goldberg, M., He, D., Horwitz, N., Kennett, R., Mountain, R., Moneti, G., Muheim, F., Mukhin, Y., Playfer, S., Rozen, Y., Stone, S., Thulasidas, M., Vasseur, G., Xing, X., Zhu, G., Bartelt, J., Csorna, S., Egyed, Z., Jain, V., Gibaut, D., and Kinoshita, K.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review D
• ISSN: 1550-7998
• ISSN (Online): 1550-2368