On the new method of computing two-loop massive diagrams

Details On the new method of computing two-loop massive diagrams On the new method of computing two-loop massive diagrams

1994-10-20

arxiv.org/abs/hep-ph/9410332v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, latex, uses epsf, a complete postscript file, including figures, is available via anonymous ftp at ttpux2.physik.uni-

Scientific paper

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.

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