Screened Perturbation Theory

@article{Karsch1997ScreenedPT,
  title={Screened Perturbation Theory},
  author={Frithjof Karsch and Andr{\'a}s Patk{\'o}s and P{\'e}ter Petreczky},
  journal={Physics Letters B},
  year={1997},
  volume={401},
  pages={69-73}
}

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References

SHOWING 1-10 OF 28 REFERENCES
Perturbative QCD at High Temperature
Recent developments of perturbation theory at finite temperature based on effective field theory methods are reviewed. These methods allow the contributions from the different scales to be separated
Effective field theory approach to high-temperature thermodynamics.
  • Braaten, Nieto
  • Physics
    Physical review. D, Particles and fields
  • 1995
TLDR
An effective field theory approach is developed for calculating the thermodynamic properties of a field theory at high temperature $T$ and weak coupling and applies it to a massless scalar field with a $\Phi^4$ interaction.
Symmetry Behavior at Finite Temperature
Spontaneous symmetry breaking at finite temperature is studied. We show that for the class of theories discussed, symmetry is restored above a critical temperature βc−1. We determine βc by a
The Weak Electroweak Phase Transition
Abstract We present a detailed analysis of the phase transition in the standard model at finite temperature. Using an improved perturbation theory, where plasma masses are determined from a set of
Three-loop free energy for high-temperature QED and QCD with fermions.
  • Arnold, Zhai
  • Physics
    Physical review. D, Particles and fields
  • 1995
TLDR
This work analytically computed the free energy density for gauge theories, with fermions, at high temperature and zero chemical potential, which requires the evaluation of three-loop diagrams, and extends the previous result for pure gauge QCD.
Pressure in thermal scalar field theory to three-loop order.
TLDR
In scalar field theory, with a {ital g}{sup 2}{phi}{sup 4} interaction, at temperature T, the complete contribution to the pressure to order is computed, which involves a three-loop thermal diagram.
...
...