THE T-MATRIX MOMENTUM-TRANSFER SPECTRAL DENSITY AND HIDDEN SYMMETRY OF GENERALIZED YUKAWA POTENTIALS

A dynamical scheme based on the equation for the T-matrix momentum-tra nsfer spectral density and a new class of integral representations for the Jost function (matrix) is proposed for the Schrodinger and Dirac Hamiltonians in spaces of arbitrary dimension N with a local and nonlo cal generalized Yukawa potential and in the model with N coupled chann els. The off-shell Jost-function method is generalized for these Hamil tonians, and a universal renormalization procedure is presented to def ine them for singular and nonlocal potentials.