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Infrared Exponents and the Running Coupling of Landau gauge QCD and their Relation to Confinement | | Reinhard Alkofer
; Christian S. Fischer
; Lorenz von Smekal
; | | Date: |
30 Sep 2002 | | Journal: | Eur.Phys.J. A17 (2003) 773 DOI: 10.1140/epja/i2002-10212-8 | | Subject: | hep-ph | | Abstract: | The infrared behaviour of the gluon and ghost propagators in Landau gauge QCD is reviewed. The Kugo-Ojima confinement criterion and the Gribov-Zwanziger horizon condition result from quite general properties of the ghost Dyson-Schwinger equation. The numerical solutions for the gluon and ghost propagators obtained from a truncated set of Dyson-Schwinger equations provide an explicit example for the anticipated infrared behaviour. The results are in good agreement with corresponding lattice data obtained recently. The resulting running coupling approaches a fix point in the infrared, $alpha(0) = 8.92/N_c$. Two different fits for the scale dependence of the running coupling are given and discussed. | | Source: | arXiv, hep-ph/0209366 | | Services: | Forum | Review | PDF | Favorites | |
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