The role of the Roper resonance in np→d(ππ)0

In this work, a model for the np→d(ππ)0 reaction is developed. It is shown that the structure of the deuteron momentum spectra for a neutron beam momentum of 1.46 GeV/c can be explained as a consequence of the interplay of two mechanisms involving the excitation of the N∗(1440) resonance and its subsequent decay into N(ππ)T=0S-wave and Δπ respectively. The relevance of the present analysis for the study of the Roper excitation and decay properties is discussed.