The Infrared Behaviour of the Running Coupling in Landau Gauge QCD

Details The Infrared Behaviour of the Running Coupling in Landau Gauge QCD The Infrared Behaviour of the Running Coupling in Landau Gauge QCD

2002-05-13

arxiv.org/abs/hep-ph/0205125v1

ActaPhys.Slov.52:191,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 3 figures, uses ActaStyle.cls, Invited talk given by R.A. at the conference RENORMALIZATION GROUP 2002, March 10 - 16

Scientific paper

Approximate solutions for the gluon and ghost propagators as well as the running coupling in Landau gauge Yang-Mills theories are presented. These propagators obtained from the corresponding Dyson-Schwinger equations are in remarkable agreement with those of recent lattice calculations. The resulting running coupling possesses an infrared fixed point, $\alpha_S(0) = 8.92/N_c$ for all gauge groups SU($N_c$). Above one GeV the running coupling rapidly approaches its perturbative form.

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