Some features of the pd→ppnπ0 reaction at 1.037 GeV

Preliminary results of the measurement of pd→ppnγγ reaction at around 1 GeV are presented. The reaction was measured at the CELSIUS storage ring using the WASA/PROMICE set-up. The quasi free mechanism was found to be dominant with Δ(1232) excitation in the proton-pion system. The signal at the position of Roper resonance was observed in the proton-π0 invariant mass. A class of “non-spectator” events was observed with small proton-proton invariant mass.