LCSR analysis of exclusive two-body B decay into charmonium

Abstract

We analyze B -> K H_c (where H_c = eta_c, J/psi, chi_{cJ(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 chi_{c1} 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 chi_{c0} decay.

9 pages, LaTeX

References in corpus (4)

• $B^{-}\to K^{-}{\chi }_{c0}$ decay from charmed meson rescattering
• Problems of QCD factorization in exclusive decays of B meson to charmonium
• Nonfactorizable corrections to B -> J/psi K
• Nonfactorizable soft contributions in the $B⟶{\eta }_{c}K,{\chi }_{c0}K$ decays with the light-cone sum rules approach

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