%0 Journal Article
%T Infrared Exponents and Running Coupling of SU(N) Yang-Mills Theories
%A C. S. Fischer
%A R. Alkofer
%J Physics
%D 2002
%I arXiv
%R 10.1016/S0370-2693(02)01809-9
%X We present approximate solutions for the gluon and ghost propagators as well as the running coupling in Landau gauge Yang-Mills theories. We solve the corresponding Dyson-Schwinger equations in flat Euclidean space-time without any angular approximation. This supplements recently obtained results employing a four-torus, i.e. a compact space-time manifold, as infrared regulator. We confirm previous findings deduced from an extrapolation with tori of different volumes: the gluon propagator is weakly vanishing in the infrared and the ghost propagator is highly singular. For non-vanishing momenta our propagators are in remarkable agreement with recent lattice calculations.
%U http://arxiv.org/abs/hep-ph/0202202v1