The Pseudothreshold Expansion of the 2-loop Sunrise Selfmass Master Amplitudes

Abstract

The values at pseudothreshold of two loop sunrise master amplitudes with arbitrary masses are obtained by solving a system of differential equations. The expansion at pseudothreshold of the amplitudes is constructed and some lowest terms are explicitly presented.

Comments: 1+22 pages, Latex, no figures, changes in Eq.(41),(44),(47)