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Low-Energy Effective Field Theories

  • Mikko Laine
  • Aleksi Vuorinen
Chapter
  • 2.1k Downloads
Part of the Lecture Notes in Physics book series (LNP, volume 925)

Abstract

The existence of a so-called infrared (IR) problem in relativistic thermal field theory is pointed out, both from a physical and a formal (imaginary-time) point of view. The notion of effective field theories is introduced, and the main issues related to their construction and use are illustrated with the help of a simple example. Subsequently this methodology is applied to the imaginary-time path integral representation for the partition function of non-Abelian gauge field theory. This leads to the construction of a dimensionally reduced effective field theory for capturing certain (so-called “static”, i.e. time-independent) properties of QCD (or more generally Standard Model) thermodynamics in the high-temperature limit.

Keywords

Bose enhancement Effective theories Electrostatic QCD Hard and soft modes Infrared divergences Linde problem Magnetostatic QCD Matching Matsubara zero mode Power counting Symmetries Truncation 

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • Mikko Laine
    • 1
  • Aleksi Vuorinen
    • 2
  1. 1.AEC, Institute for Theoretical PhysicsUniversity of BernBernSwitzerland
  2. 2.Department of PhysicsUniversity of HelsinkiHelsinkiFinland

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