Observation of $e^{+}{e}^{-}$ Annihilations into the $\boldmath{C=+1}$ Hadronic Final States ${\rho }^0{\rho }^0$ and $\varphi {\rho }^0$

The BABAR Collaboration, B. Aubert

We report the first observation of $e^{+}{e}^{-}$ annihilations into states of positive $C$-parity, namely ${\rho }^0{\rho }^0$ and $\varphi {\rho }^0$. The two states are observed in the $\pip\pim\pip\pim$ and…