Automatic computation of threeloop twopoint functions in large momentum expansion
Abstract
We discuss the calculation of twopoint threeloop functions with an arbitrary number of massive propagators and one large external momentum. The relevant subdiagrams are generated automatically. The resulting massless twopoint integrals and massive tadpoles are transformed online to FORMexpressions ready to be used by existing FORM packages which calculate them analytically. As an example we compute the quartic mass corrections to the photon polarization function.
 Publication:

Nuclear Instruments and Methods in Physics Research A
 Pub Date:
 February 1997
 DOI:
 10.1016/S01689002(97)001289
 arXiv:
 arXiv:hepph/9611354
 Bibcode:
 1997NIMPA.389..354C
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 Coefficients of example in Sect. 3 corrected. Latex, 5 pages, 1 psfigure. Extended version of the contribution to the proceedings of the AIHENP96 workshop in Lausanne, September 1996. The complete paper, including figures, is also available via anonymous ftp at ftp://ttpux2.physik.unikarlsruhe.de/ , or via www at http://wwwttp.physik.unikarlsruhe.de/cgibin/preprints/