N interaction in d breakup

The effects of the residual nucleon-delta interaction proposed by Ferreira et al. to eliminate the discrepancies between theory and experiment in d elastic scattering are studied for the breakup reaction at 228 and 294 MeV. It is found that in first order the residual interaction lowers the cross section particularly in the region of the neutron-proton final-state interaction. However, the effects of higher-order corrections generated by the N interaction are found to be non-negligible, which implies that the parameters extracted by Ferreira et al. probably must be modified.