Measurement of time-dependent CP asymmetry in B0→cc¯K(*)0 decays

B. Aubert,Y. Karyotakis,J. P. Lees,V. Poireau,E. Prencipe, X. Prudent,V. Tisserand,J. Garra Tico,E. Grauges,G. Eigen, B. Stugu, L. Sun,M. Battaglia,D. N. Brown,L. T. Kerth,G. Kolomensky, G. Lynch,I. L. Osipenkov, K. Tackmann,T. Tanabe,C. M. Hawkes,N. Soni,A. T. Watson, H. Koch,T. Schroeder, D. J. Asgeirsson,B. G. Fulsom, C. Hearty, T. S. Mattison, J. A. McKenna,A. T. Watson,M. Fritsch,K. Goetzen,T. Held, H. Koch,B. Lewandowski,M. Pelizaeus,K. Peters,T. Schroeder, M. Steinke,J. T. Boyd,N. Chevalier,W. N. Cottingham,M. P. Kelly,T. Cuhadar-Donszelmann, C. Hearty,N. S. Knecht, T. S. Mattison, J. A. McKenna,A. Khan, P. Kyberd,L. Teodorescu,A. E. Blinov,V. E. Blinov,A. D. Bukin,V. P. Druzhinin,V. B. Golubev,E. A. Kravchenko,A. P. Onuchin,S. I. Serednyakov,I. Skovpen,E. P. Solodov,A. N. Yushkov,M. Bondioli,M. Bruinsma,M. Chao, I. Eschrich,D. Kirkby,A. J. Lankford,M. Mandelkern, R. K. Mommsen,W. Roethel,D. P. Stoker, C. Buchanan,B. L. Hartfiel,A. J. R. Weinstein, S. D. Foulkes,J. W. Gary,B. 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PHYSICAL REVIEW D（2009）

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摘要

We present updated measurements of time-dependent CP asymmetries in fully reconstructed neutral B decays containing a charmonium meson. The measurements reported here use a data sample of (465 +/- 5)x10(6) Upsilon(4S)-> BB decays collected with the BABAR detector at the PEP-II asymmetric energy e(+)e(-) storage rings operating at the SLAC National Accelerator Laboratory. The time-dependent CP asymmetry parameters measured from J psi K-S(0), J psi K-L(0), psi(2S)K-S(0), eta K-c(S)0, chi K-c1(S)0, and J/psi K-*(892)(0) decays are: C-f=0.024 +/- 0.020(stat)+/- 0.016(syst) and -eta S-f(f)=0.687 +/- 0.028(stat)+/- 0.012(syst).

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关键词

CP violation,Meson,Electron–positron annihilation,Particle decay,Particle accelerator,Asymmetry,Particle physics,Physics,Atomic physics

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