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Updated: Jul 23, 2026

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
Published on: December 18, 2015
Infrared behavior and fixed points in Landau-gauge QCD
Jan M Pawlowski1, Daniel F Litim, Sergei Nedelko
1Institut für Theoretische Physik III, Universität Erlangen, Staudtstrasse 7, 91058 Erlangen, Germany.
This study explores gluon and ghost propagators in Landau-gauge Quantum Chromodynamics (QCD) using renormalization group equations. The findings support the Kugo-Ojima confinement scenario, offering insights into fundamental particle interactions.
Area of Science:
- High Energy Physics
- Quantum Chromodynamics (QCD)
- Theoretical Physics
Background:
- Understanding the infrared (IR) behavior of Quantum Chromodynamics (QCD) is crucial for explaining phenomena like quark confinement.
- Propagators of gluons and ghosts are key observables in non-perturbative QCD.
- Previous studies have faced challenges in reliably extracting IR properties due to regulator dependencies.
Purpose of the Study:
- To investigate the infrared behavior of gluon and ghost propagators in Landau-gauge QCD.
- To develop a method for extracting infrared momentum structures of Green functions.
- To support or refute existing confinement scenarios, specifically the Kugo-Ojima scenario.
Main Methods:
- Utilized an exact renormalization group equation (RGE) approach.
- Developed an optimization procedure to eliminate residual regulator dependencies.
- Applied the framework to determine the infrared leading terms of propagators in Landau-gauge QCD.
Main Results:
- Successfully extracted the infrared momentum structure of Green functions.
- Determined the infrared leading terms of gluon and ghost propagators in Landau-gauge QCD.
- The obtained results are consistent with the Kugo-Ojima confinement scenario.
Conclusions:
- The exact renormalization group equation provides a robust framework for studying infrared properties of QCD propagators.
- The findings lend strong support to the Kugo-Ojima confinement scenario.
- The developed methods offer potential for extensions to other QCD observables and gauges.
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