B ->\eta_c K(\eta_c^\prime K) decays in QCD factorization

Abstract

We study the exclusive decays of $B$ meson into pseudoscalar charmonium states ${\eta }_c$ and ${\eta }_c^{\prime }$ within the QCD factorization approach and find that the nonfactorizable 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. The theoretical decay rates are too small to accommodate the experimental data. On the other hand, we compare the theoretical calculations for $J/\psi ,{\psi }^{\prime }$, and ${\eta }_c,{\eta }_c^{\prime }$, and find that the predicted relative decay rates of these four states are approximately compatible with experimental data.

Comments: 8 pages, LaTex, 1 figure, one footnote and two references added