First Observation Of The Cabibbo Suppressed Decay B+->(D)Over-Bar(0)K(+)

M. Athanas, P. Avery,C. Jones, M. Lohner,S. Patton, C. Prescott, J. Yelton, J. Zheng,G. Brandenburg,R. Briere, A. Ershov, Y. Gao,D. Kim,R. Wilson,H. Yamamoto, T. Browder, 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,S. Kotov,I. Kravchenko,N. Kwak,L. Zhou,S. Anderson,Y. Kubota, S. Lee,J. O'Neill,R. Poling,T. Riehle,A. Smith,M. Alam,S. Athar,Z. Ling,A. Mahmood,S. Timm,F. Wappler, A. Anastassov,J. Duboscq,D. Fujino,K. Gan, T. Hart,K. Honscheid, H. Kagan, R. Kass,J. Lee,M. Spencer,M. Sung, A. Undrus, A. Wolf,M. Zoeller,B. Nemati,S. Richichi,W. Ross, H. Severini, P. Skubic,M. Bishai,J. Fast,J. Hinson,N. Menon,D. Miller, E. Shibata,I. Shipsey, M. Yurko,S. Glenn,Y. Kwon,A. Lyon,S. Roberts,E. Thorndike,C. Jessop,K. Lingel,H. Marsiske,M. Perl, V. Savinov, D. Ugolini,X. Zhou,T. Coan,V. Fadeyev, I. Korolkov, Y. Maravin,I. Narsky,V. Shelkov,J. Staeck, R. Stroynowski, I. Volobouev,J. Ye,M. Artuso, F. Azfar,A. Efimov,M. Goldberg, D. He,S. Kopp, G. Moneti,R. Mountain,S. Schuh, T. Skwarnicki,S. Stone,G. Viehhauser, J. Wang,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,M. Chadha,S. Chan,G. Eigen,J. Miller,M. Schmidtler,J. Urheim,A. Weinstein, F. Würthwein, D. Bliss,G. Masek, H. Paar, S. Prell, V. Sharma,D. Asner, J. Gronberg,T. Hill,D. Lange,R. Morrison,H. Nelson,T. Nelson,D. Roberts,B. Behrens, W. Ford,A. Gritsan,J. Roy,J. Smith, J. Alexander,R. Baker,C. Bebek,B. Berger,K. Berkelman,K. Bloom, V. Boisvert,D. Cassel,D. Crowcroft,M. Dickson,S. von Dombrowski, P. Drell,K. Ecklund,R. Ehrlich,A. Foland,P. Gaidarev, L. Gibbons,B. Gittelman, S. Gray,D. Hartill, B. Heltsley,P. Hopman,J. Kandaswamy, P. Kim,D. Kreinick,T. Lee, Y. Liu,N. Mistry,C. Ng,E. Nordberg,M. Ogg,J. Patterson,D. Peterson,D. Riley, A. Soffer,B. Valant-Spaight,C. Ward

PHYSICAL REVIEW LETTERS(1998)

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摘要
We have observed the decay B+ --> (D) over bar(0)K(+), using 3.3 x 10(6) pairs collected with the CLEO II detector at the Cornell Electron Storage Ring. We find the ratio of branching fractions R = B(B+ --> (D) over bar(0)K(+))/B(B+ --> (D) over bar(0)pi(+)) = 0.055 +/- 0.014 +/- 0.005.
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