Studies of CP violation in B->J/psi K* decays

Abstract

CP violation in $B\to J/\psi K^{\ast }$ decays is studied using an angular analysis in a data sample of 253 fb${}^{-1}$ recorded with the Belle detector at the KEKB $e^{+}{e}^{-}$ collider. The flavor separated measurements of the decay amplitudes indicate no evidence for direct CP violation. T-odd CP violation is studied using the asymmetries in triple product correlations, and the results are consistent with the Standard Model null predictions. The time-dependent angular analysis gives the following values of CP violating parameters: $\sin 2{\varphi }_1=0.24\pm 0.31\pm 0.05$ and $\cos 2{\varphi }_1=0.56\pm 0.79\pm 0.11$.

10 pages, 2 tables, 3 figures, submitted to PRL; Replaced with the version resubmitted to PRL (Jul.13,2005)

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• Improved Measurement of CP-Violation Parameters sin(2phi1) and |lambda|, B Meson Lifetimes, and B0-B0bar Mixing Parameter Delta m_d

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