Dalitz plot analysis of three-body charmonium decays in BaBar.
We study the reaction e+ e− -> gamma_ISR J/psi, where J/psi -> pi+ pi- pi0 and J/psi -> K+ K- pi0, using events obtained from the Initial State Radiation process. We measure the relative J/psi branching fraction and perform a Dalitz plot analysis of both J/psi decay modes using the isobar and Veneziano model. We study the process gamma gamma -> K anti-K pi. We observe the decays eta_c -> Ks K+- pi-+ and eta_c -> K+ K- pi0 and perform a Dalitz analysis of both eta_c decay modes. We also extract the mass dependent Kpi amplitude and phase using the model-independent partial wave analysis approach.