Phys. Rev. Lett. 84, 5940 - 5944 (2000)
Search for CP Violation in B± → J/ψK± and B± → ψ(2S)K± Decays
G. Bonvicini et al. (CLEO Collaboration)
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G. Bonvicini1, D. Cinabro1, S. McGee1, L. P. Perera1, G. J. Zhou1, E. Lipeles2, S. Pappas2, M. Schmidtler2, A. Shapiro2, W. M. Sun2, A. J. Weinstein2, F. Würthwein2 *, D. E. Jaffe3, G. Masek3, H. P. Paar3, E. M. Potter3, S. Prell3, V. Sharma3, D. M. Asner4, A. Eppich4, T. S. Hill4, R. J. Morrison4, H. N. Nelson4, R. A. Briere5, B. H. Behrens6, W. T. Ford6, A. Gritsan6, J. Roy6, J. G. Smith6, J. P. Alexander7, R. Baker7, C. Bebek7, B. E. Berger7, K. Berkelman7, F. Blanc7, V. Boisvert7, D. G. Cassel7, M. Dickson7, P. S. Drell7, K. M. Ecklund7, R. Ehrlich7, A. D. Foland7, P. Gaidarev7, L. Gibbons7, B. Gittelman7, S. W. Gray7, D. L. Hartill7, B. K. Heltsley7, P. I. Hopman7, C. D. Jones7, D. L. Kreinick7, M. Lohner7, A. Magerkurth7, T. O. Meyer7, N. B. Mistry7, E. Nordberg7, J. R. Patterson7, D. Peterson7, D. Riley7, J. G. Thayer7, P. G. Thies7, B. Valant-Spaight7, A. Warburton7, P. Avery8, C. Prescott8, A. I. Rubiera8, J. Yelton8, J. Zheng8, G. Brandenburg9, A. Ershov9, Y. S. Gao9, D. Y.-J. Kim9, R. Wilson9, T. E. Browder10, Y. Li10, J. L. Rodriguez10, H. Yamamoto10, T. Bergfeld11, B. I. Eisenstein11, J. Ernst11, G. E. Gladding11, G. D. Gollin11, R. M. Hans11, E. Johnson11, I. Karliner11, M. A. Marsh11, M. Palmer11, C. Plager11, C. Sedlack11, M. Selen11, J. J. Thaler11, J. Williams11, K. W. Edwards12, R. Janicek13, P. M. Patel13, A. J. Sadoff14, R. Ammar15, A. Bean15, D. Besson15, R. Davis15, N. Kwak15, X. Zhao15, S. Anderson16, V. V. Frolov16, Y. Kubota16, S. J. Lee16, R. Mahapatra16, J. J. O'Neill16, R. Poling16, T. Riehle16, A. Smith16, J. Urheim16, S. Ahmed17, M. S. Alam17, S. B. Athar17, L. Jian17, L. Ling17, A. H. Mahmood17 †, M. Saleem17, S. Timm17, F. Wappler17, A. Anastassov18, J. E. Duboscq18, K. K. Gan18, C. Gwon18, T. Hart18, K. Honscheid18, D. Hufnagel18, H. Kagan18, R. Kass18, T. K. Pedlar18, H. Schwarthoff18, J. B. Thayer18, E. von Toerne18, M. M. Zoeller18, S. J. Richichi19, H. Severini19, P. Skubic19, A. Undrus19, S. Chen20, J. Fast20, J. W. Hinson20, J. Lee20, N. Menon20, D. H. Miller20, E. I. Shibata20, I. P. J. Shipsey20, V. Pavlunin20, D. Cronin-Hennessy21, Y. Kwon21 ‡, A. L. Lyon21, E. H. Thorndike21, C. P. Jessop22, H. Marsiske22, M. L. Perl22, V. Savinov22, D. Ugolini22, X. Zhou22, T. E. Coan23, V. Fadeyev23, Y. Maravin23, I. Narsky23, R. Stroynowski23, J. Ye23, T. Wlodek23, M. Artuso24, R. Ayad24, C. Boulahouache24, K. Bukin24, E. Dambasuren24, S. Karamov24, G. Majumder24, G. C. Moneti24, R. Mountain24, S. Schuh24, T. Skwarnicki24, S. Stone24, G. Viehhauser24, J. C. Wang24, A. Wolf24, J. Wu24, S. Kopp25, S. E. Csorna26, I. Danko26, K. W. McLean26, Sz. Márka26, Z. Xu26, R. Godang27, K. Kinoshita27 §, I. C. Lai27, and S. Schrenk27 (CLEO Collaboration)
1Wayne State University, Detroit, Michigan 48202
2California Institute of Technology, Pasadena, California 91125
3University of California, San Diego, La Jolla, California 92093
4University of California, Santa Barbara, California 93106
5Carnegie Mellon University, Pittsburgh, Pennsylvania 15213
6University of Colorado, Boulder, Colorado 80309-0390
7Cornell University, Ithaca, New York 14853
8University of Florida, Gainesville, Florida 32611
9Harvard University, Cambridge, Massachusetts 02138
10University of Hawaii at Manoa, Honolulu, Hawaii 96822
11University of Illinois, Urbana-Champaign, Illinois 61801
12Carleton University, Ottawa, Ontario, Canada K1S 5B6 and the Institute of Particle Physics, Canada
13McGill University, Montréal, Québec, Canada H3A 2T8 and the Institute of Particle Physics, Canada
14Ithaca College, Ithaca, New York 14850
15University of Kansas, Lawrence, Kansas 66045
16University of Minnesota, Minneapolis, Minnesota 55455
17State University of New York at Albany, Albany, New York 12222
18The Ohio State University, Columbus, Ohio 43210
19University of Oklahoma, Norman, Oklahoma 73019
20Purdue University, West Lafayette, Indiana 47907
21University of Rochester, Rochester, New York 14627
22Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
23Southern Methodist University, Dallas, Texas 75275
24Syracuse University, Syracuse, New York 13244
25University of Texas, Austin, Texas 78712
26Vanderbilt University, Nashville, Tennessee 37235
27Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061
Received 2 March 2000
We present a search for direct CP violation in B±→J/ψK± and B±→ψ(2S)K± decays. In a sample of 9.7×106 BB̅ meson pairs collected with the CLEO detector, we have fully reconstructed 534 B±→J/ψK± and 120 B±→ψ(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/ψK± and [+2.0±9.1(stat)±1.0(syst)]% for B±→ψ(2S)K±.
©2000 The American Physical Society
URL: http://link.aps.org/doi/10.1103/PhysRevLett.84.5940
DOI: 10.1103/PhysRevLett.84.5940
PACS: 11.30.Er, 13.25.Hw
* Permanent address: Massachusetts Institute of Technology, Cambridge, MA 02139.
† Permanent address: University of Texas–Pan American, Edinburg, TX 78539.
‡ Permanent address: Yonsei University, Seoul 120-749, Korea.
§ Permanent address: University of Cincinnati, Cincinnati, OH 45221.
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