Search For Cp Violation In B-+/--> J/Psi K-+/- And B-+/-->Psi(2s)K-+/- Decays

G. Bonvicini,D. Cinabro,S. McGee,L. Perera,G. Zhou,E. Lipeles,S. Pappas,M. Schmidtler,A. Shapiro,W. Sun,A. Weinstein,F. Würthwein,D. Jaffe,G. Masek,H. Paar,E. Potter,S. Prell,V. Sharma,D. Asner,A. Eppich,T. Hill,R. Morrison,H. Nelson,R. Briere,B. Behrens,W. Ford,A. Gritsan,J. Roy,J. Smith,J. Alexander,R. Baker,C. Bebek,B. Berger,K. Berkelman,F. Blanc,V. Boisvert,D. Cassel,M. Dickson,P. Drell,K. Ecklund,R. Ehrlich,A. Foland,P. Gaidarev,L. Gibbons,B. Gittelman,S. Gray,D. Hartill,B. Heltsley,P. Hopman,C. Jones,D. Kreinick,M. Lohner,A. Magerkurth,T. Meyer,N. Mistry,E. Nordberg,J. Patterson,D. Peterson,D. Riley,J. Thayer,P. Thies,B. Valant-Spaight,A. Warburton,P. Avery,C. Prescott,A. Rubiera,J. Yelton,J. Zheng,G. Brandenburg,A. Ershov,Y. Gao,D. Kim,R. Wilson,T. Browder,Y. Li,J. Rodriguez,H. Yamamoto,T. Bergfeld,B. Eisenstein,J. Ernst,G. Gladding,G. Gollin,R. Hans,E. Johnson,I. Karliner,M. Marsh,M. Palmer,C. Plager,C. Sedlack,M. Selen,J. Thaler,J. Williams,K. Edwards,R. Janicek,P. Patel,A. Sadoff,R. Ammar,A. Bean,D. Besson,R. Davis,N. Kwak,X. Zhao,S. Anderson,V. Frolov,Y. Kubota,S. Lee,R. Mahapatra,J. O'Neill,R. Poling,T. Riehle,A. Smith,J. Urheim,S. Ahmed,M. Alam,S. Athar,L. Jian,L. Ling,A. Mahmood,M. Saleem,S. Timm,F. Wappler,A. Anastassov,J. Duboscq,K. Gan,C. Gwon,T. Hart,K. Honscheid,D. Hufnagel,H. Kagan,R. Kass,T. Pedlar,H. Schwarthoff,J. Thayer,E. von Toerne,M. Zoeller,S. Richichi,H. Severini,P. Skubic,A. Undrus,S. Chen,J. Fast,J. Hinson,J. Lee,N. Menon,D. Miller,E. Shibata,I. Shipsey,V. Pavlunin,D. Cronin-Hennessy,Y. Kwon,A. Lyon,E. Thorndike,C. Jessop,H. Marsiske,M. Perl,V. Savinov,D. Ugolini,X. Zhou,T. Coan,V. Fadeyev,Y. Maravin,I. Narsky,R. Stroynowski,J. Ye,T. Wlodek,M. Artuso,R. Ayad,C. Boulahouache,K. Bukin,E. Dambasuren,S. Karamov,G. Majumder,G. Moneti,R. Mountain,S. Schuh,T. Skwarnicki,S. Stone,G. Viehhauser,J. Wang,A. Wolf,J. Wu,S. Kopp,S. Csorna,I. Danko,K. McLean,Sz. Márka,Z. Xu,R. Godang,K. Kinoshita,I. Lai,S. Schrenk

PHYSICAL REVIEW LETTERS（2000）

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Abstract

We present a search for direct CP violation in B+/- --> J/psi K+/- and B+/- --> psi(2S)K+/- decays. In a sample of 9.7 X 10(6) B (B) over bar meson pairs collected with the CLEO detector, we have fully reconstructed 534 B+/- --> J/psi K+/- and 120 B+/- --> psi(2S)K+/- decays with very low background. We have measured the CP-violating charge asymmetry to be [+1.8 +/- 4.3(stat) +/- 0.4(syst)]% for B+/- --> J/psi K+/- and [+2.0 +/- 9.1(stat) +/- 1.0(syst)]% for B+/- --> psi(2S)K+/-.

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Key words

search,inb±→j/ψk±andb±→ψ2sk±decays

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