New Measurement Of B -> D*Pi Branching Fractions

G. Brandenburg,R. A. Briere,Y. S. Gao,D. Y.-J. Kim,R. Wilson,H. Yamamoto,T. E. Browder,F. Li, Y. Li,J. L. Rodriguez,T. Bergfeld,B. I. Eisenstein,J. Ernst,G. E. Gladding,G. D. Gollin,R. M. Hans,E. Johnson, I. Karliner,M. A. Marsh,M. Palmer,M. Selen,J. J. Thaler,K. W. Edwards,A. Bellerive,R. Janicek,D. B. MacFarlane,K. W. McLean,P. M. Patel,A. J. 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, M. Lattery,S. J. Lee,J. J. O'Neill,S. Patton,R. Poling,T. Riehle, V. Savinov,A. Smith,M. S. Alam,S. B. Athar,Z. Ling,A. H. Mahmood, H. Severini,S. Timm,F. Wappler, A. Anastassov,S. Blinov,J. Duboscq,K. Fisher,D. Fujino,R. Fulton,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. Wood,M. Bishai,J. Fast,E. Gerndt,J. Hinson,N. Menon,D. Miller, E. Shibata, I. Shipsey, M. Yurko, L. Gibbons,S. Johnson,Y. Kwon,S. Roberts,E. Thorndike,C. Jessop,K. Lingel,H. Marsiske,M. Perl,S. Schaffner, 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,F. Frasconi,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,S. Marka,A. Freyberger,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. Asner,D. Bliss, W. Brower,G. Masek, H. Paar, V. Sharma, 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,K. Cho, W. Ford,H. Park,P. Rankin,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,R. Elia,A. Foland,P. Gaidarev,B. Gittelman, S. Gray,D. Hartill, B. Heltsley,P. Hopman,J. Kandaswamy,N. Katayama, 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,C. Ward,M. Athanas, P. Avery,C. Jones, M. Lohner, C. Prescott, J. Yelton, J. Zheng

PHYSICAL REVIEW LETTERS（1998）

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摘要

The decays Y(4S) --> , followed by B --> D*pi and D* --> D pi, permit reconstruction of all kinematic quantities that describe the sequence without reconstruction of the D, with reasonably low backgrounds. Using an integrated e(+)e(-) luminosity of 3.1 fb(-1) accumulated at the Y(4S) by the CLEO-II Il detector, we report measurements of B((B) over bar(0) --> D*(+)pi(-)) = (2.81 +/- 0.11 +/- 0.21 +/- 0.05) x 10(-3) and B(B- --> D*(0) pi(-)) = (4.34 +/- 0.33 +/- 0.34 +/- 0.18) x 10(-3).

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elementary particles

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