Infrared behaviour and fixed points in Landau gauge QCD
Jan M. Pawlowski, Daniel F. Litim, Sergei Nedelko, Lorenz von Smekal
TL;DR
This paper uses an exact renormalisation group approach to analyze the infrared behavior of gluon and ghost propagators in Landau gauge QCD, supporting the Kugo-Ojima confinement scenario.
Contribution
It introduces an optimization procedure to reduce regulator dependence and determines the infrared leading terms of propagators in Landau gauge QCD.
Findings
Supports the Kugo-Ojima confinement scenario
Determines infrared leading terms of propagators
Introduces an optimization method for regulator dependence
Abstract
We investigate the infrared behaviour of gluon and ghost propagators in Landau gauge QCD by means of an exact renormalisation group equation. We explain how, in general, the infrared momentum structure of Green functions can be extracted within this approach. An optimisation procedure is devised to remove residual regulator dependences. In Landau gauge QCD this framework is used to determine the infrared leading terms of the propagators. The results support the Kugo-Ojima confinement scenario. Possible extensions are discussed.
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