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The baryonic decays of $J/ \psi$ provide a new way to study the internalstructure of baryons. We apply a simple diquark model to the calculation of thedecay cross-sections for the reactions $J/ \psi \longrightarrow \bar{p}p$,$\bar pN^*(1440)$, $\bar{N}^{\ast}N^{\ast}$, $\bar{\Lambda}\Lambda$ and$\bar\Sigma^0\Sigma^0$. The results are different from those given by theordinary constituent quark model. Hence these reactions may provide a new checkof two different pictures for the baryons

Diquark model for $J/ ψ$ baryonic decays