Measurement of lepton momentum moments in the decay (B)over-bar -> Xl(nu)over-bar and determination of the heavy quark expansion parameters and vertical bar V-cb vertical bar Academic Article uri icon

abstract

  • We measure the primary lepton momentum spectrum in BX v decays, for p 1.5 GeV/c in the B rest frame. From this, we calculate various moments of the spectrum. In particular, we find R0 1.7GeV(d/dE sl)dE/1.5GeV(d/ dEsl)dE=0.61870.0014stat0. 0016sys and R11.5GeVE (d/dEsl)dE/ 1.5GeV(d/dEsl)dE=(1. 78100.0007stat0.0009sys) GeV. We use these moments to determine non-perturbative parameters governing the semileptonic width. In particular, we extract the heavy quark expansion parameters =(0.390.03stat0.06 sys0.12th) GeV and 1 = (-0.250.02stat0.05sys 0.14 th) GeV2. The theoretical constraints used are evaluated through order 1/MB3 in the non-perturbative expansion and 0s2 in the perturbative expansion. We use these parameters to extract |Vcb| from the world average of the semileptonic width and find |Vcb| = (40.80.5 sl0.4 (1,)exp0.9th) 10 -3. In addition, we extract the short range b-quark mass m b1S=(4.820.070exp0.11 th) GeV/c2. Finally, we discuss the implications of our measurements for the theoretical understanding of inclusive semileptonic processes. 2003 The American Physical Society.

published proceedings

  • PHYSICAL REVIEW D

author list (cited authors)

  • Mahmood, A. H., Csorna, S. E., Danko, I., Bonvicini, G., Cinabro, D., Dubrovin, M., ... Wang, J. C.

citation count

  • 15

complete list of authors

  • Mahmood, AH||Csorna, SE||Danko, I||Bonvicini, G||Cinabro, D||Dubrovin, M||McGee, S||Bornheim, A||Lipeles, E||Pappas, SP||Shapiro, A||Sun, WM||Weinstein, AJ||Briere, RA||Chen, GP||Ferguson, T||Tatishvili, G||Vogel, H||Adam, NE||Alexander, JP||Berkelman, K||Boisvert, V||Cassel, DG||Drell, PS||Duboscq, JE||Ecklund, KM||Ehrlich, R||Galik, RS||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||Patterson, JR||Peterson, D||Pivarski, J||Richichi, SJ||Riley, D||Sadoff, AJ||Schwarthoff, H||Shepherd, MR||Thayer, JG||Urner, D||Wilksen, T||Warburton, A||Weinberger, M||Athar, SB||Avery, P||Breva-Newell, L||Potlia, V||Stoeck, H||Yelton, J||Benslama, K||Eisenstein, BI||Gollin, GD||Karliner, I||Lowrey, N||Plager, C||Sedlack, C||Selen, M||Thaler, JJ||Williams, J||Edwards, KW||Ammar, R||Besson, D||Zhao, X||Anderson, S||Frolov, VV||Gong, DT||Kubota, Y||Li, SZ||Poling, R||Smith, A||Stepaniak, CJ||Urheim, J||Metreveli, Z||Seth, KK||Tomaradze, A||Zweber, P||Ahmed, S||Alam, MS||Ernst, J||Jian, L||Saleem, M||Wappler, F||Arms, K||Eckhart, E||Gan, KK||Gwon, C||Honscheid, K||Hufnagel, D||Kagan, H||Kass, R||Pedlar, TK||von Toerne, E||Zoeller, MM||Severini, H||Skubic, P||Dytman, SA||Mueller, JA||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||Thayer, JB||Thorndike, EH||Coan, TE||Gao, YS||Liu, F||Maravin, Y||Stroynowski, R||Artuso, M||Boulahouache, C||Blusk, S||Bukin, K||Dambasuren, E||Mountain, R||Muramatsu, H||Nandakumar, R||Skwarnicki, T||Stone, S||Wang, JC

publication date

  • April 2003