On practical problems to compute the ghost propagator in SU(2) lattice gauge theory

Details On practical problems to compute the ghost propagator in SU(2) lattice gauge theory On practical problems to compute the ghost propagator in SU(2) lattice gauge theory

2003-11-27

arxiv.org/abs/hep-lat/0311041v2

Phys.Rev. D69 (2004) 074507

Physics

High Energy Physics

High Energy Physics - Lattice

15 pages, 5 postscript figures. 2 Figures added Revised version as to be published in Phys.Rev.D

Scientific paper

10.1103/PhysRevD.69.074507

In SU(2) lattice pure gauge theory we study numerically the dependence of the ghost propagator G(p) on the choice of Gribov copies in Lorentz (or Landau) gauge. We find that the effect of Gribov copies is essential in the scaling window region, however, it tends to decrease with increasing beta. On the other hand, we find that at larger beta-values very strong fluctuations appear which can make problematic the calculation of the ghost propagator.

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