Perturbation theory and non-perturbative renormalization flow in scalar field theory at finite temperature
Abstract
We use the non-perturbative renormalization group to clarify some features of perturbation theory in thermal field theory. For the specific case of the scalar field theory with O(N) symmetry, we solve the flow equations within the local potential approximation. This approximation reproduces the perturbative results for the screening mass and the pressure up to order g3, and starts to differ at order g4. The method allows a smooth extrapolation...
Paper Details
Title
Perturbation theory and non-perturbative renormalization flow in scalar field theory at finite temperature
Published Date
Mar 1, 2007
Journal
Volume
784
Issue
1-4
Pages
376 - 406
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