Determination of $\eta\to\pi^+\pi^-\pi^0$ Dalitz plot slopes and   asymmetries with the KLOE detector
  We have studied, with the KLOE detector at the DA$\Phi$NE $\Phi$-Factory, the dynamics of the decay $\eta\to\pi^+\pi^-\pi^0$ using $\eta$ mesons from the decay $\phi\to\eta\gamma$ for an integrated luminosity ${\mathcal L}$ = 450 pb$^{-1}$. From a fit to the Dalitz plot density distribution we obtain a precise measurement of the slope parameters. An alternative parametrization relates the $\pi^+\pi^-\pi^0$ slopes to that for $\eta\to 3\pi^0$ showing the consistency of KLOE results for both channels. We also obtain the best confirmation of the $C$-invariance in the $\eta\to\pi^+\pi^-\pi^0$ decay. 
The KLOE collaboration: F. Ambrosino, A. Antonelli, M. Antonelli, F.   Archilli, C. Bacci, P. Beltrame, G. Bencivenni, S. Be...