$\psi (3770)$ and $B$ meson exclusive decay $B\to \psi (3770)K$ in QCD factorization

Abstract

Belle has observed surprisingly copious production of $\psi (3770)$ in $B$ meson decay $B\to \psi (3770)K$, of which the rate is comparable to that of $B\to \psi (3686)K$. We study this puzzling process in the QCD factorization approach with the effect of S-D mixing considered. We find that the soft scattering effects in the spectator interactions play an essential role. With a proper parametrization for the higher twist soft end-point singularities associated with kaon, and with the S-D mixing angle $\theta =-12^{\circ }$, the calculated decay rates can be close to the data. Implications of these soft spectator effects to other charmonium production in $B$ exclusive decays are also emphasized.

journal version

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Cited by in corpus (6)

• Weak productions of new charmonium in semi-leptonic decays of B_c
• Constraints on a New Light Spin-One Particle from Rare b -> s Transitions
• Nonfactorizable $B\to {\chi }_{c0}K$ decay and QCD factorization
• Study the contributions of S, P, and D-wave resonances to the quasi-two-body decays $B_s^0\to \psi (3686,3770)K\pi$ in perturbative QCD approach
• Study of the quasi-two-body decays B^{0}_{s} \rightarrow ψ(3770)(ψ(3686))π^+π^- with perturbative QCD approach
• Study of $B_c\to \psi (2S)K$, ${\eta }_c(2S)K$, $\psi (3770)K$ decays with perturbative QCD approach