2019 Impact factor 4.389
Particles and Fields
Eur. Phys. J. C 6, 693-699
DOI 10.1007/s100529800947

First results with a new method
for calculating 2-loop box-functions

R. Kreckel - D. Kreimer - K. Schilcher

Johannes Gutenberg-Universität, Institut für Physik / WA ThEP, D-55099 Mainz, Germany

Received: 7 May 1998 / Published online: 21 August 1998

Abstract
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.


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