The transition form factors for semi-leptonic weak decays of $J/\psi$ in QCD sum rules

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Wang, Yu-Ming
Zou, Hao
Wei, Zheng-Tao
Li, Xue-Qian
Lü, Cai-Dian
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Within the Standard Model, we investigate the semi-leptonic weak decays of $J/\psi$. The various form factors of $J/\psi$ transiting to a single charmed meson ($D^{(*)}_{(d,s)}$) are studied in the framework of the QCD sum rules. These form factors fully determine the rates of the weak semi-leptonic decays of $J/\psi$ and provide valuable information about the non-perturbative QCD effects. Our results indicate that the decay rate of the semi-leptonic weak decay mode $J/\psi \to D^{(*)-}_{s}+e^{+}+\nu_{e}$ is at order of $10^{-10}$.
Comment: 28 pages, 6 figures, revised version to be published in Eur.Phys.J.C
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High Energy Physics - Phenomenology
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