First results with a new method
for calculating 2-loop box-functions
Johannes Gutenberg-Universität, Institut für Physik / WA ThEP, D-55099 Mainz, Germany
Received: 7 May 1998 / Published online: 21 August 1998
We describe a first attempt to calculate scalar 2-loop box-functions with arbitrary internal masses, applying a novel method proposed in [#!hepph9407234!#]. Four of the eight integrals are accessible to integration by means of the residue theorem, leaving a rational function in the remaining variables. The result of the procedure is a three- or sometimes two-dimensional integral representation over a finite volume that can be further evaluated using numerical methods.