ω → π+π−π0 decays in p-p collisions

The goal of this experiment is the investigation of the ω decay mechanism to three pions. This information may be gained from a comparison of the density distribution in the Dalitz plot with theoretical predictions. To reach this goal a high statistics experimental Dalitz plot distribution is necessary. Measurements of the Dalitz plot for the ω → π+π−π0 decay have been done before in experiments on the determination of the spin and parity of the ω meson. However, the statistics of existing measurements is limited to about 4600 ω → 3π events. The WASA-at-COSY experiment has produced a higher amount of fully reconstructed ω → 3π events using proton- proton and proton-deuteron collisions