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AUBERT, B; BARATE, R; PALANO, A; PAPPAGALLO, M; POMPILI, A; CHEN, J. C; QI, N. D; RANG, G; WANG, P; ZHU, Y. S; EIGEN, G; OFTE, I; BOUTIGNY, D; STUGU, B; ABRAMS, G. S; BATTAGLIA, M; BREON, A. B; BROWN, D. N; BUTTON-SHAFER, J; CAHN, R. N; CHARLES, E; DAY, C. T; GILL, M. S; COUDERC, F; GRITSAN, A. V; GROYSMAN, Y; JACOBSEN, R. G; KADEL, R. W; KADYK, J; KERTH, L. T; KOLOMENSKY, Yu. G; KUKARTSEV, G; LYNCH, G; MIR, L. M; KARYOTAKIS, Y; ODDONE, P. J; ORIMOTO, T. J; PRIPSTEIN, M; ROE, N. A; RONAN, M. T; WENZEL, W. A; BARRETT, M; FORD, K. E; HARRISON, T. J; HART, A. J; LEES, J. P; HAWKES, C. M; MORGAN, S. E; WATSON, A. T; FRITSCH, M; GOETZEN, K; HELD, T; KOCH, H; LEWANDOWSKI, B; PELIZAEUS, M; PETERS, K; POIREAU, V; TISSERAND, V; ZGHICHE, A; GRAUGES, E
Physical review letters, 10/2005, Letnik: 95, Številka: 15Journal Article
We present an updated measurement of time-dependent C P asymmetries and the C P -odd fraction in the decay B 0 → D * + D * − using 232 × 10 6 B ¯¯¯ B pairs collected by the BABAR detector at the SLAC PEP-II B factory. We determine the C P -odd fraction to be 0.125 ± 0.044 ( stat ) ± 0.007 ( syst ) . The time-dependent C P asymmetry parameters C + and S + are determined to be 0.06 ± 0.17 ( stat ) ± 0.03 ( syst ) and − 0.75 ± 0.25 ( stat ) ± 0.03 ( syst ) , respectively. The standard model predicts these parameters to be 0 and − sin 2 β , respectively, in the absence of penguin amplitude contributions.
