Amplitudes for the analysis of the decay $J/\psi \to K^{+} K^{-} \pi^0$
  We construct an analytical model for two channel, two-body scattering amplitudes, and then apply it in the description of the three-body $J/\psi \to K^+K^-\pi^0$ decay. In the construction of the partial wave amplitudes, we combine the low energy resonance region with the Regge asymptotic behavior determined from direct two-body production. We find that resonance production in the $K\pi$ channel in $J/\psi$ decays seems to differ from that observed in direct $K\pi$ production, while the mass distribution in the $K\bar K$ channel may be compatible. 
Peng Guo, Ryan Mitchell, Matthew Shepherd and Adam P. Szczepaniak
hep-ph hep-ex