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The hidden charm decay of Y(4140) by the rescattering mechanism
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abstract
Assuming that Y(4140) is the second radial excitation of the P-wave charmonium $\chi_{cJ}^{\prime\prime}$ ($J=0, 1$), the hidden charm decay mode of Y(4140) is calculated in terms of the rescattering mechanism. Our numerical results show that the upper limit of the branching ratio of the hidden charm decay $Y(4140)\to J/\psi\phi$ is on the order of $10^{-4}\sim 10^{-3}$ for both of the charmonium assumptions for Y(4140), which disfavors the large hidden charm decay pattern indicated by the CDF experiment. It seems to reveal that the pure second radial excitation of the P-wave charmonium $\chi_{cJ}^{\prime\prime}$ ($J=0, 1$) is problematic.
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Two-body Hidden Charm Decays of $D$ Wave Charmonia
Using a meson-loop model calibrated to psi(3770) to J/psi eta, the paper predicts Gamma(psi2(3823) to J/psi eta) = 29.6 keV and smaller eta_c omega and psi3(3842) rates.
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