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. 
A. Kievsky, M. Viviani and L.E. Marcucci
nucl-th