NEW REPRESENTATION OF 2-LOOP PROPAGATOR AND VERTEX FUNCTIONS

Authors
CZARNECKI A KILIAN U KREIMER D
Citation
A. Czarnecki et al., NEW REPRESENTATION OF 2-LOOP PROPAGATOR AND VERTEX FUNCTIONS, Nuclear physics. B, 433(2), 1995, pp. 259-275
Citations number
27
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. B → ACNP
ISSN journal
05503213
Volume
433
Issue
2
Year of publication
1995
Pages
259 - 275
Database
ISI
SICI code
0550-3213(1995)433:2<259:NRO2PA>2.0.ZU;2-A
Abstract
We present a new method of calculating scalar propagator and vertex fu nctions in the two-loop approximation, for arbitrary masses of particl es, It is based on a double integral representation, suitable for nume rical evaluation, Real and imaginary parts of the diagrams are calcula ted separately, so that there is no need to use complex arithmetics in the numerical program.