Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-11-07
PoS QCD-TNT09:017,2009
Physics
High Energy Physics
High Energy Physics - Lattice
12 pages, 9 figures. Talk at the International Workshop on QCD Green's Functions, Confinement and Phenomenology, September 200
Scientific paper
I present some new results regarding confinement as it appears in Coulomb gauge. It is found that: i) a recently proposed Yang-Mills vacuum wavefunctional in temporal gauge and 2+1 dimensions yields a Coulomb-gauge ghost propagator and linear Coulomb potential in good agreement with lattice Monte Carlo results; ii) adding a few constituent gluons to heavy quark-antiquark states brings the interaction energy much closer to that of the static quark potential, and suggests the beginnings of gluon-chain formation at roughly one fermi; iii) a perturbative approach to Faddeev-Popov eigenvalues indicates that the zero eigenvalue at the Gribov horizon may occur either at, or away from, p=0, depending on the gauge choice and spacetime dimension. This last result may be relevant to the qualitatively different infrared behavior of the ghost propagator in Coulomb and Landau gauges.
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