2PI renormalized effective action for gauge theories

Abstract

We show how to perform renormalization in the framework of the 2PI effective action for abelian gauge theories. In addition to the usual renormalization conditions one needs to incorporate new ones in order to remove non-transverse UV divergences in the truncated two- and four-photon functions. The corresponding counterterms are allowed by gauge symmetry, in-medium independent and suppressed with respect to the accuracy of the truncation.

4 pages, to appear in the proceedings of Strong and Electroweak Matter 2006, BNL, New-York, May 2006

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Cited by in corpus (2)

• Ward Identities for the 2PI effective action in QED
• Polarization tensor of charged gluons in color magnetic background field at finite temperature