Unconfined-heavy-fermion model of psions

We consider the possibility that the psions are bound states of $F$ and $\overline{F}$, where $F$ is a heavy spin-½ particle. A potential is assumed which allows the existence of unconfined continuum states of $F\overline{F}$ as well. We find that the known spectroscopy of the psions, neglecting spin effects, can readily be reproduced by simple potentials of this kind. We identify the psion constituents as the particles observed by Perl et al., through their leptonic decay modes. In order to account for the various observed decays of $\psi \mathrm{}\left(3.7\right)\mathrm{}$ and $\frac{J}{\Psi }\mathrm{}\left(3.1\right)\mathrm{}$, we find that the $F$ particles have a small coupling to $C=-1\mathrm{}$ mesons, but must have a relatively large coupling to $C=+1\mathrm{}$ mesons. This conclusion, which should also hold in models in which the psion constituents are confined, has several important consequences for the production of psions and $F$ by hadrons, photons, and neutrinos, which we discuss.