Improved measurement of /V(cb)/ using B-->D*l nu decays

R A Briere; G P Chen; T Ferguson; G Tatishvili; H Vogel; N E Adam; J P Alexander; C Bebek; B E Berger; K Berkelman; F Blanc; V Boisvert; D G Cassel; P S Drell; J E Duboscq; K M Ecklund; R Ehrlich; L Gibbons; B Gittelman; S W Gray; D L Hartill; B K Heltsley; L Hsu; C D Jones; J Kandaswamy; D L Kreinick; A Magerkurth; H Mahlke-Krüger; T O Meyer; N B Mistry; E Nordberg; M Palmer; J R Patterson; D Peterson; J Pivarski; D Riley; A J Sadoff; H Schwarthoff; M R Shepherd; J G Thayer; D Urner; B Valant-Spaight; G Viehhauser; A Warburton; M Weinberger; S B Athar; P Avery; H Stoeck; J Yelton; G Brandenburg; A Ershov; D Y-J Kim; R Wilson; K Benslama; B I Eisenstein; J Ernst; G D Gollin; R M Hans; I Karliner; N Lowrey; M A Marsh; C Plager; C Sedlack; M Selen; J J Thaler; J Williams; K W Edwards; R Ammar; D Besson; X Zhao; S Anderson; V V Frolov; Y Kubota; S J Lee; S Z Li; R Poling; A Smith; C J Stepaniak; J Urheim; S Ahmed; M S Alam; L Jian; M Saleem; F Wappler; E Eckhart; K K Gan; C Gwon; T Hart; K Honscheid; D Hufnagel; H Kagan; R Kass; T K Pedlar; J B Thayer; E von Toerne; T Wilksen; M M Zoeller; S J Richichi; H Severini; P Skubic; S A Dytman; S Nam; V Savinov; S Chen; J W Hinson; J Lee; D H Miller; V Pavlunin; E I Shibata; I P J Shipsey; D Cronin-Hennessy; A L Lyon; C S Park; W Park; E H Thorndike; T E Coan; Y S Gao; F Liu; Y Maravin; I Narsky; R Stroynowski; J Ye; M Artuso; C Boulahouache; K Bukin; E Dambasuren; R Mountain; T Skwarnicki; S Stone; J C Wang; A H Mahmood; S E Csorna; I Danko; Z Xu; G Bonvicini; D Cinabro; M Dubrovin; S McGee; A Bornheim; E Lipeles; S P Pappas; A Shapiro; W M Sun; A J Weinstein; G Masek; H P Paar; R Mahapatra; CLEO collaboration

doi:10.1103/PhysRevLett.89.081803

Improved measurement of /V(cb)/ using B-->D*l nu decays

Phys Rev Lett. 2002 Aug 19;89(8):081803. doi: 10.1103/PhysRevLett.89.081803. Epub 2002 Aug 6.

Authors

R A Briere¹, G P Chen, T Ferguson, G Tatishvili, H Vogel, N E Adam, J P Alexander, C Bebek, B E Berger, K Berkelman, F Blanc, V Boisvert, D G Cassel, P S Drell, J E Duboscq, K M Ecklund, R Ehrlich, L Gibbons, B Gittelman, S W Gray, D L Hartill, B K Heltsley, L Hsu, C D Jones, J Kandaswamy, D L Kreinick, A Magerkurth, H Mahlke-Krüger, T O Meyer, N B Mistry, E Nordberg, M Palmer, J R Patterson, D Peterson, J Pivarski, D Riley, A J Sadoff, H Schwarthoff, M R Shepherd, J G Thayer, D Urner, B Valant-Spaight, G Viehhauser, A Warburton, M Weinberger, S B Athar, P Avery, H Stoeck, J Yelton, G Brandenburg, A Ershov, D Y-J Kim, R Wilson, K Benslama, B I Eisenstein, J Ernst, G D Gollin, R M Hans, I Karliner, N Lowrey, M A Marsh, C Plager, C Sedlack, M Selen, J J Thaler, J Williams, K W Edwards, R Ammar, D Besson, X Zhao, S Anderson, V V Frolov, Y Kubota, S J Lee, S Z Li, R Poling, A Smith, C J Stepaniak, J Urheim, S Ahmed, M S Alam, L Jian, M Saleem, F Wappler, E Eckhart, K K Gan, C Gwon, T Hart, K Honscheid, D Hufnagel, H Kagan, R Kass, T K Pedlar, J B Thayer, E von Toerne, T Wilksen, M M Zoeller, S J Richichi, H Severini, P Skubic, S A Dytman, S Nam, V Savinov, S Chen, J W Hinson, J Lee, D H Miller, V Pavlunin, E I Shibata, I P J Shipsey, D Cronin-Hennessy, A L Lyon, C S Park, W Park, E H Thorndike, T E Coan, Y S Gao, F Liu, Y Maravin, I Narsky, R Stroynowski, J Ye, M Artuso, C Boulahouache, K Bukin, E Dambasuren, R Mountain, T Skwarnicki, S Stone, J C Wang, A H Mahmood, S E Csorna, I Danko, Z Xu, G Bonvicini, D Cinabro, M Dubrovin, S McGee, A Bornheim, E Lipeles, S P Pappas, A Shapiro, W M Sun, A J Weinstein, G Masek, H P Paar, R Mahapatra; CLEO collaboration

Affiliation

¹ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.

PMID: 12190458
DOI: 10.1103/PhysRevLett.89.081803

Abstract

We determine the weak coupling /V(cb)/ between the b and c quarks using a sample of 3 x 10(6) BB; events in the CLEO detector at the Cornell Electron Storage Ring. We determine the yield of reconstructed B-->D*l nu; 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 Gamma/dw. By extrapolating d Gamma/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)/F(1), where F(1) is the form factor at w=1. Combined with theoretical results for F(1) we determine /V(cb)/=0.0469+/-0.0014(stat)+/-0.0020(syst)+/-0.0018(theor).