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Non-perturbative renormalization of Φ-derivable approximations in theories with multiple fields

  • U. ReinosaEmail author
Quark-Gluon-Plasma Thermalization

Abstract.

We provide a renormalization procedure for Φ-derivable approximations in theories coupling different types of fields. We illustrate our approach on a scalar ϕ4 theory coupled to fermions via a Yukawa-like interaction. The non-perturbative renormalization amounts to fixing the scalar coupling via a set of nested Bethe-Salpeter equations coupling fermions to scalars.

PACS.

11.10.Wx Finite-temperature field theory 11.15.Tk Other nonperturbative techniques 11.10.Gh Renormalization 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2006

Authors and Affiliations

  1. 1.Institut für Theoretische PhysikUniversität HeidelbergHeidelbergGermany

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