Predictions of the Paris<i>N</i>-<i>N</i>potential for three-nucleon continuum observables: Comparison of two approaches

Abstract

Two different approaches for solving three-nucleon scattering are compared. The one relies on separable subsystem interactions, while the other one can use any two-nucleon potential and solves the three-body integral equations directly. Both approaches are tested in the case of a finite-rank expansion of the Paris N-N potential (the so-called PEST) and the results are then compared to the predictions calculated straight from the original interaction. By considering cross sections and polarization observables of elastic n-d scattering at ${\mathit{E}}_{\mathit{n}}$=10 MeV, it is found that both methods lead to compatible results. Where appropriate a comparison is also made to experimental data showing a remarkably good agreement between theory and experiment.