CP-violating asymmetries in B0 decays to K+K-KS(L)0 and KS0KS0KS(L)0

Decay rates and time-dependent and direct CP asymmetries in the decays B0→K+K-KS(L) and KSKSKS(L) are studied. Resonant and nonresonant contributions to the three-body decays are carefully investigated. Nonresonant effects on two-body and three-body matrix elements are constrained by QCD counting rules. The predicted branching ratios are consistent with the data within the theoretical and experimental errors, though the theoretical central values are somewhat smaller than the experimental ones. Owing to the presence of color-allowed tree amplitudes in B0→K+K-KS(L), this penguin-dominated mode may be subject to a potentially significant tree pollution and the deviation of the mixing-induced CP asymmetry from that measured in B→J/ψKS, namely, Δsin2βK+K-KS(L)≡sin2βK+K-KS(L)-sin2βJ/ψKS, can be as large as O(0.10). In contrast, the KSKSKS(L) modes appear theoretically very clean in our picture with negligible theoretical errors in Δsin2βKSKSKS(L). Direct CP asymmetries in K+K-KS(L) and KSKSKS(L) modes are found to be very small