The results of an analysis of some recent data on the reactions $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$, $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}{\pi }^0{\pi }^0$ with the subtracted $\omega {\pi }^0$ events, $e^{+}{e}^{-}\to \omega {\pi }^0$, $e^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$, $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$, $K^{-}p\to {\pi }^{+}{\pi }^{-}\Lambda$, the decays $J/\psi \to {\pi }^{+}{\pi }^{-}{\pi }^0$, ${\tau }^{-}\to {\nu }_{\tau }{\pi }^{+}{\pi }^{-}{\pi }^{-}{\pi }^0$, and ${\tau }^{-}\to {\nu }_{\tau }\omega {\pi }^{-}$, upon taking into account both the strong energy dependence of the partial widths on energy and the previously neglected mixing of the $\rho$-type resonances, are presented. The above effects are shown to exert an essential influence on the specific values of masses and coupling constants of heavy resonances and, hence, are necessary to be accounted for in establishing their true nature.

• Received 22 July 1996

DOI:https://doi.org/10.1103/PhysRevD.55.2663