Nucleon-deuteron scattering with Delta-isobar excitation, - II: Elastic scattering

The description of neutron-deuteron elastic scattering is based on a couple d-channel two-baryon interaction that allows for virtual excitation of a nu cleon to a Delta-isobar. This gives rise to an effective three-nucleon forc e in three-nucleon systems. The three-particle scattering equations are sol ved by employing a separable expansion of the two-baryon transition matrix. The Coulomb interaction is not included. Spin-averaged and spin-dependent observables of elastic neutron-deuteron scattering are calculated and compa red with experimental data. The calculated results refer to neutron lab ene rgies between 0 and 70 MeV. Some long-standing discrepancies in low-energy spin observables between theoretical predictions and experimental data cann ot be removed by the considered Delta-isobar effects.