Rare decays of η-meson: the background of ρ- and ω- mesons

S. Kullander, H. Calén, K. Fransson +7

The problem of $\rho$- and $\omega$- mesons contributions to the background for $\eta \to {\pi }^0{e}^{+}{e}^{-}$ decay and to the asymmetries in the decays $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0$ and $\eta \to {\pi }^{+}{\pi }^{-}\gamma$ is consider…