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Infrared Exponents and Running Coupling of SU(N) Yang-Mills Theories | | C. S. Fischer
; R. Alkofer
; | | Date: |
21 Feb 2002 | | Journal: | Phys.Lett. B536 (2002) 177-184 | | Subject: | hep-ph hep-lat hep-th nucl-th | | Abstract: | 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. | | Source: | arXiv, hep-ph/0202202 | | Services: | Forum | Review | PDF | Favorites | |
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