Evaluation of Multiloop Diagrams via Lightcone Integration

Abstract

We present a systematic method to determine the dominant regions of internal momenta contributing to any two-body high-energy near-forward scattering diagram. Such a knowledge is used to evaluate leading high-energy dependences of loop diagrams. It also gives a good idea where dominant multiparticle cross sections occur.

Comments: 14 pages with eight postscript figures; composed in the Revtex widetext format. This is an expanded and a completely rewritten version replacing the previous one