Search for CP violation in B+/- --> J/psiK+/- and B+/- --> psi(2S)K+/- decays

We present a search for direct CP violation in B+/--->J/psiK+/- and B+/--->psi(2S)K+/- decays. In a sample of 9.7x10(6) B meson pairs collected with the CLEO detector, we have fully reconstructed 534 B+/--->J/psiK+/- and 120 B+/--->psi(2S)K+/- decays with very low background. We have mea...

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Published in:Physical review letters 2000-06, Vol.84 (26 Pt 1), p.5940-5944
Main Authors: Bonvicini, G, Cinabro, D, McGee, S, Perera, L P, Zhou, G J, Lipeles, E, Pappas, S, Schmidtler, M, Shapiro, A, Sun, W M, Weinstein, A J, Jaffe, D E, Masek, G, Paar, H P, Potter, E M, Prell, S, Sharma, V, Asner, D M, Eppich, A, Hill, T S, Morrison, R J, Nelson, H N, Briere, R A, Behrens, B H, Ford, W T, Gritsan, A, Roy, J, Smith, J G, Alexander, J P, Baker, R, Bebek, C, Berger, B E, Berkelman, K, Blanc, F, Boisvert, V, Cassel, D G, Dickson, M, Drell, P S, Ecklund, K M, Ehrlich, R, Foland, A D, Gaidarev, P, Gibbons, L, Gittelman, B, Gray, S W, Hartill, D L, Heltsley, B K, Hopman, P I, Jones, C D
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Language:English
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Summary:We present a search for direct CP violation in B+/--->J/psiK+/- and B+/--->psi(2S)K+/- decays. In a sample of 9.7x10(6) B meson pairs collected with the CLEO detector, we have fully reconstructed 534 B+/--->J/psiK+/- 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/psiK+/- and [+2.0+/-9. 1(stat)+/-1.0(syst)]% for B+/--->psi(2S)K+/-.
ISSN:0031-9007