SU(4) Symmetry and the Possible Existence of New Hadrons

Abstract

We derive SU(4) mass formulas taking mixing, whenever it arises, fully into account. With the masses of the usual hadrons and that of the newly discovered resonance $\ensuremath{\psi}$ as input, we predict the masses of the new ${1}^{\ensuremath{-}}$ and ${0}^{\ensuremath{-}}$ mesons as well as the ${\mathrm{\textonehalf{}}}^{+}$ and ${\frac{3}{2}}^{+}$ baryons.