1994/05/31 by Andrzej Czarnecki, Ulrich Kilian, Dirk Kreimer
Physics and Astronomy · #hep-ph
published as Nucl.Phys. B433 (1995) 259-275 · 13 pages (9 figures not included; complete ps file available from the authors), LaTeX, MZ-TH/94-13
arxiv created 1994/05/31 · arxiv updated 2009/11/30
We present a new method of calculating scalar propagator and vertex functions in the two-loop approximation, for arbitrary masses of particles. It is based on a double integral representation, suitable for numerical evaluation. Real and imaginary parts of the diagrams are calculated separately, so that there is no need to use complex arithmetics in the numerical program.