On the new method of computing two-loop massive diagrams
Abstract
Description
A recently proposed method of calculating scalar two-loop propagator and vertex functions with massive particles is illustrated with simple examples. A double integral representation is derived with the example of a propagator function. An analogous representation is used to compute the vertex function for space-like external momenta. Ways of dealing with divergent diagrams and of controlling the accuracy of the numerical evaluation of the two-loop functions are also discussed.
8 pages, latex, uses epsf, a complete postscript file, including figures, is available via anonymous ftp at ttpux2.physik.uni-karlsruhe.de (129.13.102.139) as /ttp94-21/ttp94-21.ps, Local preprint number TTP 94-21
8 pages, latex, uses epsf, a complete postscript file, including figures, is available via anonymous ftp at ttpux2.physik.uni-karlsruhe.de (129.13.102.139) as /ttp94-21/ttp94-21.ps, Local preprint number TTP 94-21