Spectra of new hadrons

Abstract

The cavity approximation to the bag model is used to calculate the masses of the new hadrons in models which explain the $\psi$ resonances in terms of new quark flavors. The charmed-quark scheme and Harari's six-quark scheme are considered in detail. Difficulties associated with gluon interactions and with the interpretation of the ${\psi }^{\prime }$ are also discussed.