https://doi.org/10.1140/epja/i2005-10312-y
Quark-Gluon-Plasma Thermalization
Non-perturbative renormalization of Φ-derivable approximations in theories with multiple fields
Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120, Heidelberg, Germany
* e-mail: reinosa@hep.itp.tuwien.ac.at
Received:
28
October
2005
Accepted:
2
January
2006
Published online:
1
September
2006
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 –
© Società Italiana di Fisica and Springer-Verlag, 2006