LCSR analysis of exclusive two-body B decay into charmonium
Abstract
We analyze B -> K Hc (where Hc = etac, J/psi, chicJ(J=0,1)) decays estimating nonfactorizable contributions from the light-cone sum rules (LCSR). Nonfactorizable contributions are sizable for B -> K J/psi and particularly for B -> K chic1 decay. For the B decays into a (pseudo)scalar charmonia we find small nonfactorizable contributions which cannot accommodate relatively large branching ratios obtained by measurements. This specially concerns the puzzling B -> K chic0 decay.
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