Measurement Of The (B)Over-Bar->Dl(Nu)Over-Bar Partial Width And Form Factor Parameters

M. Athanas, P. Avery,C. Jones, M. Lohner, C. Prescott, J. Yelton, J. Zheng,G. Brandenburg,R. Briere, A. Ershov, Y. Gao, D. Kim,R. Wilson,H. Yamamoto, T. Browder,F. Li, Y. Li, J. Rodriguez,T. Bergfeld,B. Eisenstein,J. Ernst,G. Gladding, G. Gollin,R. Hans,E. Johnson, I. Karliner,M. Marsh,M. Palmer,M. Selen,J. Thaler, K. Edwards, A. Bellerive,R. Janicek, D. MacFarlane,P. Patel,A. Sadoff,R. Ammar, P. Baringer,A. Bean,D. Besson,D. Coppage,C. Darling,R. Davis,N. Hancock,S. Kotov,I. Kravchenko,N. Kwak,S. Anderson,Y. Kubota, S. Lee,J. O'Neill,S. Patton,R. Poling,T. Riehle, V. Savinov, A. Smith,M. Alam,S. Athar,Z. Ling,A. Mahmood, H. Severini,S. Timm,F. Wappler, A. Anastassov,S. Blinov,J. Duboscq,D. Fujino,K. Gan, T. Hart,K. Honscheid, H. Kagan, R. Kass, J. Lee,M. Spencer,M. Sung, A. Undrus,R. Wanke, A. Wolf,M. Zoeller,B. Nemati,S. Richichi,W. Ross, P. Skubic,M. Bishai,J. Fast,E. Gerndt,J. Hinson,N. Menon, D. Miller, E. Shibata, I. Shipsey, M. Yurko, L. Gibbons,S. Glenn,S. Johnson,Y. Kwon,S. Roberts,E. Thorndike,C. Jessop,K. Lingel,H. Marsiske,M. Perl, D. Ugolini, R. Wang, X. Zhou,T. Coan,V. Fadeyev, I. Korolkov, Y. Maravin,I. Narsky,V. Shelkov,J. Staeck, R. Stroynowski, I. Volobouev, J. Ye,M. Artuso,A. Efimov,M. Gao,M. Goldberg, D. He,S. Kopp, G. Moneti,R. Mountain,S. Schuh, T. Skwarnicki,S. Stone,G. Viehhauser,X. Xing, J. Bartelt, S. Csorna,V. Jain,K. McLean,S. Marka,R. Godang, K. Kinoshita,I. Lai,P. Pomianowski,S. Schrenk,G. Bonvicini,D. Cinabro,R. Greene,L. Perera,G. Zhou,B. Barish,M. Chadha,S. Chan,G. Eigen,J. Miller,C. O'Grady,M. Schmidtler,J. Urheim,A. Weinstein, F. Würthwein,D. Bliss,G. Masek, H. Paar, S. Prell, V. Sharma,D. Asner, J. Gronberg,T. Hill,R. Kutschke,D. Lange, S. Menary,R. Morrison,H. Nelson,T. Nelson,C. Qiao,J. Richman,D. Roberts, A. Ryd,M. Witherell,R. Balest,B. Behrens, W. Ford,H. Park,J. Roy, J. Smith, J. Alexander,C. Bebek,B. Berger,K. Berkelman,K. Bloom,D. Cassel,H. Cho,D. Coffman,D. Crowcroft,M. Dickson, P. Drell,K. Ecklund,R. Ehrlich,A. Foland,P. Gaidarev,B. Gittelman, S. Gray,D. Hartill, B. Heltsley,P. Hopman,J. Kandaswamy, P. Kim,D. Kreinick,T. Lee, Y. Liu,G. Ludwig,J. Masui,J. Mevissen,N. Mistry,C. Ng,E. Nordberg,M. Ogg,J. Patterson,D. Peterson,D. Riley, A. Soffer,B. Valant-Spaight,C. Ward

PHYSICAL REVIEW LETTERS(1997)

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摘要
We have studied the decay (B) over bar --> Dl<(nu)over bar>, where I = e or mu. From a fit to the differential decay rate d Gamma/dw we measure the rate normalization F-D (1)\V-cb\ and form factor slope <(rho)over cap>(2)(D), and, using measured values of tau(B), find Gamma(B --> Dl<(nu)over bar>) = (12.0 +/- 0.9 +/- 2.1) ns(-1). The resulting branching fractions are B((B) over bar(0) --> D(+)l(-)<(nu)over bar>) = (1.87 +/- 0.15 +/- 0.32)% and B(B- --> D(0)l(-)<(nu)over bar>) = (1.94 +/- 0.15 +/- 0.34)%. The form factor parameters are in agreement with those measured in B --> D*l<(nu)over bar> decays, as predicted by heavy quark effective theory.
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