Measuring the aspect ratio renormalization of anisotropic-lattice gluons -art. no. 074501

Using tadpole-improved actions we investigate the consistency between diffe rent methods of measuring the aspect ratio renormalization of anisotropic-l attice gluons for bare aspect ratios chi (0) = 4,6,10 and inverse lattice s pacing in the range a(s)(-1) = 660-840 MeV. The tadpole corrections to the action, which are established self-consistently, are defined for two cases, mean link tadpoles in the Landau gauge and gauge invariant mean plaquette tadpoles. Parameters in the latter case exhibited no dependence on the spat ial lattice size L, while in the former, parameters showed only a weak depe ndence on L easily extrapolated to L = infinity. The renormalized anisotrop y chi (R) was measured using both the torelon dispersion relation and the s ideways potential method. There is general agreement between these approach es, but there are discrepancies which an evidence for the presence of latti ce artifact contributions. For the torelon these are estimated to be O(alph a (S)a(s)(2)/R-2), where R is the flux-tube radius. We also present some ne w data that suggest that rotational invariance is established more accurate ly for the mean-link action than the plaquette action.