2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185599The S-matrix for a spin 1/2 particle in the presence of a potential which is the sum of the Coulomb potential V_c=-A_1/r and a Lorentz scalar potential V_s= -A_2/r is calculatedLatex 10 pages no figuresHigh Energy Physics - Theorytext