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New Representation of Two-Loop Propagator and Vertex Functions
journal contribution
posted on 2023-05-16, 09:40 authored by Czarnecki, A, Kilian, U, Kreimer, DWe present a new method of calculating scalar propagator and vertex functions in the two-loop approximation, for arbitrary masses of particles. It is based on a double integral representation, suitable for numerical evaluation. Real and imaginary parts of the diagrams are calculated separately, so that there is no need to use complex arithmetics in the numerical program.
History
Publication title
Nuclear Physics BVolume
433Pagination
259-275ISSN
0550-3213Department/School
School of Natural SciencesPublisher
Elsevier Science BvPlace of publication
AmsterdamRepository Status
- Restricted