CP Violation in the Decay $\eta \to {\pi }^{+}{\pi }^{-}\gamma$

C. Q. Geng, J. N. Ng, T. H. Wu

We study the CP violating effects in the decay of $\eta \to {\pi }^{+}{\pi }^{-}\gamma$. We show that to have CP violation in the decay, one has to consider both linear and circular photon polarizations.…