Asymptotics of Feynman Diagrams and The Mellin-Barnes Representation

Abstract

It is shown that the integral representation of Feynman diagrams in terms of the traditional Feynman parameters, when combined with properties of the Mellin--Barnes representation and the so called {\it converse mapping theorem}, provide a very simple and efficient way to obtain the analytic asymptotic behaviours in both the large and small ratios of mass scales.

References added. This is the version published in Physics Letters B