Bdecays without final-state charm particles andCPnoninvariance

Abstract

Branching ratios and CP noninvariance of nonleptonic rare exclusive B decays without charm particles in the final state are studied. Decay channels, such as ${\mathit{B}}_{\mathrm{d}}^0$→${\mathit{K}}^0$φ,${\mathit{K}}^{\mathrm{*}0}$φ, $B_s^0$→K${¯}^0$φ,K${¯}^{\mathrm{*}0}$φ, $B_d$,s→φφ,$K^0$K${¯}^0$,${\mathit{K}}^{\mathrm{*}0}$ K${\mathrm{¯}}^0$,${\mathit{K}}^0$K${\mathrm{¯}}^{\mathrm{*}0}$,${\mathit{K}}^{\mathrm{*}0}$K${\mathrm{¯}}^{\mathrm{*}0}$, etc., that can give direct evidence for the W-loop diagrams are pointed out. Some decay modes have large (tens of percent) CP noninvariance of partial-decay-rate differences. Decays such as $B_u^{+}$→$K^{+}$ ${\rho }^0$, ${\mathit{K}}^{+}$ ${\mathrm{\pi }}^{+}$ ${\mathrm{\pi }}^{\mathrm{-}}$,${\mathit{K}}^{+}$φ,${\mathit{K}}^{+}$ ${\mathit{K}}^{+}$ ${\mathit{K}}^{\mathrm{-}}$ might be of special interest because of the simplicity in the origin of their CP noninvariance and in their experimental detectability.