Nonfactorizable contributions in B decays to charmonium:: The case of B-→K-hc -: art. no. 054023

Nonleptonic B to charmonium decays generally show deviations from the factorization predictions. For example, the mode B--->K(-)chi(c0) has been experimentally observed with a sizable branching fraction while its factorized amplitude vanishes. We investigate the role of rescattering effects mediated by intermediate charmed meson production in this class of decay modes, and consider B--->K(-)h(c) with h(c) the J(PC)=1(+-) (c) over barc meson. Using an effective Lagrangian describing interactions of pairs of heavy-light Q (q) over bar mesons with a quarkonium state, we relate this mode to the analogous mode with chi(c0) in the final state. We find B(B--->K(-)h(c)) large enough to be measured at B factories, so that this decay mode could be used to study the poorly known h(c).