N-D SCATTERING ABOVE THE DEUTERON BREAKUP THRESHOLD

The complex Kohn variational principle and the (correlated) hyperspher ical harmonics technique are applied to study N-d scattering above the deuteron breakup threshold. The configuration with three outgoing nuc leons is explicitly taken into account by solving a set of differentia l equations with outgoing boundary conditions. A convenient procedure is used to obtain the correct boundary conditions at values of the hyp erradius of approximate to 100 fm. The inclusion of the Coulomb potent ial is straightforward and does not give additional difficulties. Nume rical results have been obtained for a simple s-wave central potential . They are in nice agreement with the benchmarks produced by different groups using the Faddeev technique. Comparisons are also;done with ex perimental elastic N-d cross section at several energies.