An analytic approach to constructing effective local interactions in few-body systems and its application to N4He, N3H, N3He, and 3He4He scattering

The approach to the problem of constructing effective local operators of interaction between systems of strongly interacting particles, based on the requirement of proper analytical structure of partial-wave scattering amplitudes, has been developed. The approach has been applied to constructing effective potentials for N4He, N3H, N3He, and 3He4He scattering.