Some consequences concerning the new resonance discovered ine+e−annihilation

Abstract

The new resonance discovered in $e^{+}{e}^{-}$ annihilation at $M_{\psi }\simeq 3.1$ GeV is identified as one of the "missing" vector mesons in SU(4). We discuss some consequences of assigning this particle to the adjoint representation 63 of SU(8), assuming strong interactions are spin- and SU(4)-unitary-spin-independent. By assuming quark-spin conservation in SU(8), we obtain selection rules for the resonance $\psi$ which explain, in a simple manner, the observed narrow width ${\Gamma }_{\psi }\le 1.9$ MeV.