New resonances and $\Gamma (V\to e^{+}{e}^{-})$

A new $V-\gamma$ coupling constant relation is obtained. It rests on a previously derived relation and the modification involved in going from the Proca to the Duffin-Kemmer-Petiau formalism. This relation is validated by comparison of $\Gamma (V\to e^{+}{e}^{-})$ for $\psi -{\psi }^{\prime }$ and $\rho -\omega -\phi$ mesons, which groups' masses differ greatly. It shows that $\psi -{\psi }^{\prime }$ are consistent with a (modified) Han-Nambu model.