... decays in QCD factorization.

We study the exclusive decays of the B meson into pseudoscalar charmonium states ηc and η'c within the QCD factorization approach and find that the non-factorizable corrections to naive factorization are infrared safe at leading-twist order. The spectator interactions arising from the kaon twist-3 effects are formally power suppressed but chirally and logarithmically enhanced. An important improvement by including the O(αs) corrections is the cancellation of the renormalization scale μ dependence of the decay amplitude. However, the calculated decay rates are too small to accommodate the experimental data. On the other hand, we compare the theoretical calculations for B meson decays to J/ψ,ψ', ηc and ηc, and find that the predicted relative decay rates of these four states are approximately compatible with the experimental data. [ABSTRACT FROM AUTHOR]