Determination of the (B)over-bar -> D(*)l(nu)over-bar decay width and vertical bar V-cb vertical bar Academic Article uri icon

abstract

  • In the standard model, the charged current of the weak interaction is governed by a unitary quark mixing matrix that also leads to CP violation. Measurement of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements is essential to searches for new physics, either through the structure of the CKM matrix, or a departure from unitarity. We determine the CKM matrix element |V cb | using a sample of 310 6 BB events in the CLEO detector at the Cornell Electron Storage Ring. We determine the yield of reconstructed B 0 D* + and B - D* 0 decays as a function of w, the boost of the D* in the B rest frame, and from this we obtain the differential decay rate d/dw. By extrapolating d/dw to w = 1, the kinematic end point at which the D* is at rest relative to the B, we extract the product |V cb |(1), where (1) is the form factor at w=1. We find |V cb |(1) = 0.04310.0013(stat) 0.0018(syst). We combine |V cb |(1) with theoretical results for (1) to determine |V cb | = 0.04690.0014(stat) 0.0020(syst)0.0018(theor). We also integrate the differential decay rate over w to obtain B(B 0 D * + = (6090.190.40)% and B(B - D* 0 ) = (6.500. 200.43)%. 2003 The American Physical Society.

published proceedings

  • PHYSICAL REVIEW D

author list (cited authors)

  • Adam, N. E., Alexander, J. P., Bebek, C., Berger, B. E., Berkelman, K., Blanc, F., ... Vogel, H.

citation count

  • 30

complete list of authors

  • Adam, NE||Alexander, JP||Bebek, C||Berger, BE||Berkelman, K||Blanc, F||Boisvert, V||Cassel, DG||Drell, PS||Duboscq, JE||Ecklund, KM||Ehrlich, R||Gibbons, L||Gittelman, B||Gray, SW||Hartill, DL||Heltsley, BK||Hsu, L||Jones, CD||Kandaswamy, J||Kreinick, DL||Magerkurth, A||Mahlke-Kruger, H||Meyer, TO||Mistry, NB||Nordberg, E||Palmer, M||Patterson, JR||Peterson, D||Pivarski, J||Riley, D||Sadoff, AJ||Schwarthoff, H||Shepherd, MR||Thayer, JG||Urner, D||Valant-Spaight, B||Viehhauser, G||Warburton, A||Weinberger, M||Athar, SB||Avery, P||Stoeck, H||Yelton, J||Brandenburg, G||Ershov, A||Kim, DYJ||Wilson, R||Benslama, K||Eisenstein, BI||Ernst, J||Gollin, GD||Hans, RM||Karliner, I||Lowrey, N||Marsh, MA||Plager, C||Sedlack, C||Selen, M||Thaler, JJ||Williams, J||Edwards, KW||Ammar, R||Besson, D||Zhao, X||Anderson, S||Frolov, VV||Kubota, Y||Lee, SJ||Li, SZ||Poling, R||Smith, A||Stepaniak, CJ||Urheim, J||Ahmed, S||Alam, MS||Jian, L||Saleem, M||Wappler, F||Eckhart, E||Gan, KK||Gwon, C||Hart, T||Honscheid, K||Hufnagel, D||Kagan, H||Kass, R||Pedlar, TK||Thayer, JB||von Toerne, E||Wilksen, T||Zoeller, MM||Richichi, SJ||Severini, H||Skubic, P||Dytman, SA||Nam, S||Savinov, V||Chen, S||Hinson, JW||Lee, J||Miller, DH||Pavlunin, V||Shibata, EI||Shipsey, IPJ||Cronin-Hennessy, D||Lyon, AL||Park, CS||Park, W||Thorndike, EH||Coan, TE||Gao, YS||Liu, F||Maravin, Y||Narsky, I||Stroynowski, R||Ye, J||Artuso, M||Boulahouache, C||Bukin, K||Dambasuren, E||Mountain, R||Skwarnicki, T||Stone, S||Wang, JC||Mahmood, AH||Csorna, SE||Danko, I||Xu, Z||Bonvicini, G||Cinabro, D||Dubrovin, M||McGee, S||Bornheim, A||Lipeles, E||Pappas, SP||Shapiro, A||Sun, WM||Weinstein, AJ||Masek, G||Paar, HP||Mahapatra, R||Briere, RA||Chen, GP||Ferguson, T||Tatishvili, G||Vogel, H

publication date

  • December 2003