Methods for the nonperturbative approximation of form factors and scattering amplitudes

Abstract

Methods are described for the nonperturbative calculation of wave functions and scattering amplitudes in light-cone quantization. Form factors are computed from the boost-invariant wave functions, which appear as coefficients in a Fock-state expansion of the field-theoretic eigenstate. A technique is proposed for calculating scattering amplitudes from matrix elements of a T operator between such composite-particle eigenstates.

Comments: 4 pages, 1 figure; LaTeX, aipproc.sty, epsf.sty; to appear in the proceedings of the 7th Conference on the Intersections of Particle and Nuclear Physics, Quebec City, May 22-28, 2000