Response of nonrelativistic confined systems
Response of nonrelativistic confined systems
We study the nonrelativistic response of a ``diquark'' bound by confining forces, for which perturbation theory in the interaction fails. As nonperturbative alternatives we consider the Gersch-Rodriguez-Smith (GRS) theory and a summation method. We show that, contrary to the case of singular repulsive forces, the GRS theory can generally be …