Dalitz plot: parametrization, phase space, final-state interaction, meson: decay, pi: mass, kinematics, omega(783), Juelich COSY PS, density, WASA, $pi^{+} pi^{-}$, phase shift, experimental results, error: statistical, Uppsala CELSIUS Stor, omega(783) $\rightarrow pi^{+} pi^{-} pi^{0}$