We discuss possible mass spectroscopy of vector-meson states in a color scheme, namely the SU(3)′ ⊗ SU(3)″ scheme of Han and Nambu. Interesting mass formulas are derived under some dynamical assumptions. These are compared with those of Sanda and Terazawa. Two possible assignments for the $\psi$ particles (including the one at ∼4.1 GeV) are considered.

• Received 7 July 1975

DOI:https://doi.org/10.1103/PhysRevLett.35.1062