Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2006-09-30
Braz.J.Phys.37:219-225,2007
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 7 figures, talk presented by AM at the conference "Infrared QCD in Rio", Rio de Janeiro, Brazil, 5th-9th of June 2006
Scientific paper
Non-perturbative properties of QCD, such as color confinement, are encoded in the infrared behavior of correlation functions, e.g. propagators and vertices. Various analytic predictions have been suggested for these quantities in various gauges. Here we numerically test these predictions using lattice gauge theory. In particular, we present results for the 2- and 3-point functions for SU(2) Landau-gauge Yang-Mills theory in three and in four dimensions. Special attention is paid to systematic finite-volume effects. The gluon and ghost propagators are also evaluated in the so-called interpolating gauge (between the Landau and the Coulomb gauge), in order to study their gauge-dependence. Finally, we consider these propagators in Landau gauge at finite temperature, with the aim of understanding the effect of the deconfinement phase transition on their infrared behavior. All our results are compatible with the so-called Gribov-Zwanziger confinement scenario.
Cucchieri Attilio
Maas Axel
Mendes Tereza
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