Theoretical description of three- and four-nucleon scattering states using bound-state-like wave functions

Bound-state-like wave functions are used to determine the scattering matrix corresponding to low-energy n-d and p-(3)He collisions. To this end, the coupled-channel form of the integral relations derived from the Kohn variational principle is used. The construction of degenerate bound-state-like wave functions belonging to the continuum spectrum of the Hamiltonian is discussed. Examples are shown using realistic nucleon-nucleon forces.