Automatic Computation Of Three-Loop Two-Point Functions In Large Momentum Expansion
K. G. Chetyrkin, R. Harlander, J. H. Kuehn, M. Steinhauser
Abstract
We discuss the calculation of two-point three-loop functions with an arbitrary number of massive propagators and one large external momentum. The relevant subdiagrams are generated automatically. The resulting massless two-point integrals and massive tadpoles are transformed on-line to FORM-expressions 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.
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