Current Algebra and theη→π+π−π0γDecay Mode

The rate for $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^0\gamma$ has been calculated in terms of the rate for $\eta \to {\pi }^0\gamma \gamma$, using current algebra and the hypothesis of a partially conserved axial-vector current. The results agree with a previous calculation by Singer based on a vector-meson dominance model. The rate for bremsstrahlung emission was found to be smaller than the direct decay rate, but not negligible.