CP Asymmetries in B_d --> D^{*+}D^{*-} and B_s --> D^{*+}_s D^{*-}_s Decays: P-wave Dilution, Penguin and Rescattering Effects

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  • 16 April 1999
Abstract
Determination of the CP-violating parameters \sin 2\beta and \sin 2\beta' is shown to be possible from B^0_d vs \bar{B}^0_d --> D^{*+}D^{*-} and B^0_s vs \bar{B}^0_s --> D^{*+}_sD^{*-}_s decays without doing the angular analysis. The P-wave dilution factors of these two asymmetries are found to be 0.89 and 0.90, respectively, using the factorization approximation and heavy quark symmetry. The penguin-induced corrections amount to about 2% and 3% in the corresponding B_d and B_s channels. Final-state rescattering effects could be handled by detecting the neutral modes B^0_d and \bar{B}^0_d --> D^{*0}\bar{D}^{*0}.

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