Measurement Of The Branching Fraction, And Bounds On The Cp-Violating Asymmetries, Of Neutral B Decays To (Dd -/+)-D-*+/-

B. Aubert,R. Barate, D. Boutigny,J.-M. Gaillard, A. Hicheur,Y. Karyotakis,J. P. Lees,P. Robbe,V. Tisserand,A. Zghiche,A. Palano, A. Pompili, J. C. Chen,N. D. Qi, G. Rong, P. Wang, Y. S. Zhu,G. Eigen,I. Ofte,B. Stugu,G. S. Abrams, A. W. Borgland,A. B. Breon, D. N. Brown,J. Button-Shafer,R. N. Cahn, E. Charles,M. S. Gill,A. V. Gritsan,Y. Groysman,R. G. Jacobsen,R. W. Kadel,J. Kadyk,L. T. Kerth,Yu. Kolomensky,J. F. Kral, G. Kukartsev,C. LeClerc,M. E. Levi, G. Lynch,L. M. Mir,P. J. Oddone, T. J. Orimoto,M. Pripstein,N. A. Roe,A. Romosan,M. T. Ronan,V. G. Shelkov,A. V. Telnov,W. A. Wenzel,T. J. Harrison,C. M. Hawkes,D. J. Knowles,R. C. Penny, A. T. Watson,N. K. Watson,T. Deppermann,K. Goetzen, H. Koch,B. Lewandowski,M. Pelizaeus,K. Peters,H. Schmuecker, M. Steinke,N. R. Barlow, W. Bhimji, J. T. Boyd,N. Chevalier,P. J. Clark,W. N. Cottingham,C. Mackay, F. F. Wilson, C. Hearty,T. S. Mattison,J. A. McKenna,D. Thiessen,P. Kyberd,A. K. McKemey,V. E. Blinov,A. D. Bukin,V. B. Golubev,V. N. 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Jackson,R. Kowalewski,J. Roney,H. Band, S. Dasu,M. Datta, A. Eichenbaum,H. Hu, J. Johnson,R. Liu,F. Lodovico, A. Mohapatra, Y. Pan,R. Prepost,S. Sekula,J. von Wimmersperg-Toeller,J. Wu, S. Wu,Z. Yu,H. Neal

PHYSICAL REVIEW LETTERS（2003）

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摘要

We present measurements of the branching fraction and CP-violating asymmetries for neutral B decays to D*+/-D-/+. The measurement uses a data sample of approximately 88x10(6) Y(4S)-->B (B) over bar decays collected with the BABAR detector at the SLAC PEP-II asymmetric-energy e(+)-e(-) collider. By fully reconstructing the D*+/-D-/+ decay products, we measure the branching fraction to be (8.8+/-1.0+/-1.3)x10(-4) and the time-integrated CP-violating asymmetry between the rates to D*-D+ and D*+D- to be A=-0.03+/-0.11+/-0.05. We also measure the time-dependent CP-violating asymmetry parameters to be S-+=-0.24+/-0.69+/-0.12, C-+=-0.22+/-0.37+/-0.10 for B-->D*-D+ and S+-=-0.82+/-0.75+/-0.14, C+-=-0.47+/-0.40+/-0.12 for B-->D*+D-. In each case, the first error is statistical and the second error is systematic.

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