Normal Hadronic Decays ofψandψ′

Abstract

A phenomenological model for decays of $\psi$ and ${\psi }^{\prime }$ into normal hadronic modes is proposed. This model can explain the decay rate $\Gamma (\psi \to \pi \rho )$ as well as the puzzlingly large rate $\Gamma (\psi \to \varphi {\pi }^{+}{\pi }^{-})$ in comparison to $\Gamma (\psi \to \omega {\pi }^{+}{\pi }^{-})$. It also predicts many other relations which can be easily tested experimentally.