Numerical methods in calculating boson and fermion loop corrections (Q1263953)

The paper presents accurate numerical methods for calculating the one boson and the one fermion loop energy in a static spherically symmetric background field for a simple theory of fermions interacting with bosons through Yukawa coupling. The essential steps in calculating boson and fermion loop energies include construction of the full Green's functions and calculation of the various renormalization counterterms. FORTRAN programs are developed for calculation of the process energy. They are tested and the remainders are estimated.