Systematic study of largeCPviolations in decays of neutralb-flavored mesons

CP-violation effects in partial-decay-rate asymmetries of $B_d^0$ and $B_s^0$ systems are examined within the framework of the Kobayashi-Maskawa model. We concentrate on those hadronic final states into which both $B^0$ and B¯ ${}_{}{}^0{}_{}{}^{}$ can decay. The rephasing-invariant formalism is used in our calculation. We find a quite large asymmetry (∼0.6) in some decay modes, such as $B_d^0$→$D^{+}$ ${\pi }^{\mathrm{-}}$, $B_s^0$→$D^{+}$ ${\pi }^{\mathrm{-}}$, $D^0$φ, etc., but we still need ${10}^6$–${10}^7$ bb¯ pairs for testing these effects for 3σ signature. In addition, the contribution of the penguin diagrams and the problem of strong-interaction phases of final states are also briefly discussed. We find that for testing CP violations with only the penguin contribution the best decays are $B_d^0$→φ$K_S$, $B_s^0$→φ$K_S$, which need, for 3σ signature, 3×${10}^8$ bb¯ pairs.