ψ(3770) and B meson exclusive decay B → ψ(3770)K in QCD factorization |
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Authors: | Ying-Jia Gao Ce Meng Kuang-Ta Chao |
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Affiliation: | (1) Department of Physics, Peking University, 100871 Beijing, PRC;(2) China Center of Advanced Science and Technology (World Laboratory), 100080 Beijing, PRC |
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Abstract: | Belle has observed surprisingly copious production of ψ(3770) in the B meson decay B → ψ(3770)K, whose rate is comparable to that of B → ψ(3686)K. We study this puzzling process in the QCD factorization approach with the effect of the 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 θ = - 12°, 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. |
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Keywords: | 13.25.Hw Decays of bottom mesons 12.38.Bx Perturbative calculations 14.40.Gx Mesons with S = C = B = 0, mass > 2.5G eV (including quarkonia) |
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