NEW REPRESENTATION OF THE 2-LOOP CROSSED VERTEX FUNCTION

Authors
FRINK A KILIAN U KREIMER D
Citation
A. Frink et al., NEW REPRESENTATION OF THE 2-LOOP CROSSED VERTEX FUNCTION, Nuclear physics. B, 488(1-2), 1997, pp. 426-440
Citations number
17
Categorie Soggetti
Physics, Nuclear
Journal title
Nuclear physics. B → ACNP
ISSN journal
05503213
Volume
488
Issue
1-2
Year of publication
1997
Pages
426 - 440
Database
ISI
SICI code
0550-3213(1997)488:1-2<426:NROT2C>2.0.ZU;2-A
Abstract
We calculate the two-loop vertex function for the crossed topology, an d for arbitrary masses and external momenta. We derive a double integr al representation, suitable for a numerical evaluation by a Gaussian q uadrature. Real and imaginary parts of the diagram can be calculated s eparately.