Antiproton-proton annihilation at rest into ωηπ0

The Crystal Barrel detector at LEAR was used to study pp̄ annihilation at rest into the final state ωηπ0, where the final‐state mesons were observed in all‐neutral decay modes. A sample of 10.9×104 ωηπ0 events was obtained from the analysis of 106 annihilations into all‐neutral final states. An amplitude analysis of the Dalitz plot shows that the final state is dominated by production of the a0(980), along with contributions from the a2(1320) and the b1(1235). No additional contributions were required to fit the Dalitz plot, and upper limits for the production of vector and axial‐vector particles decaying to ηπ0 were determined.