Nonet ansatz and hadronic decays ofψandψ′

A phenomenological model for normal hadronic decays of $\psi$ and ${\psi }^{\prime }$ has been proposed, where these decays are assumed to proceed via SU(3) vector currents. We predict an approximate universal decay ratio of $\psi$ and ${\psi }^{\prime }$ into any normal hadronic channels. A potential inconsistency of the quark-line rule has been pointed out. If we remedy this defect suitably, then the nonet ansatz can explain the puzzling ratio $\frac{\Gamma (\psi \to \phi {\pi }^{+}{\pi }^{-})}{\Gamma (\psi \to \omega {\pi }^{+}{\pi }^{-})}=0.20\mathrm{}\pm 0.10$ in a simple way. Our model predicts also many relations which can be easily tested experimentally.