Renormalization and gauge symmetry for 2PI effective actions
arXiv:hep-ph/0411255 · doi:10.1142/9789812702159_0046
Abstract
We explore a method to recover symmetry identities in the 2PI formalism. It is based on non-perturbative approximations to the 1PI effective action. We discuss renormalization questions raised by this technique.
5 pages, 3 figures. To appear in the conference proceedings of Strong Electroweak Matter 2004 (SEWM04), Helsinki, Finland. 16-19 Jun 2004