Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-10-10
PoSLAT2007:290,2007
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 3 figures, poster presented at Lattice-2007, Regensburg, July 30 - August 4, 2007, 1 figure replaced
Scientific paper
We present recent results of the Landau gauge gluon and ghost propagators in SU(3) pure gauge theory at Wilson \beta=5.7 for lattice sizes up to 80^4 corresponding to physical volumes up to (13.2 fm)^4. In particular, we focus on finite-volume and Gribov copy effects. We employ a gauge fixing method that combines a simulated annealing algorithm with finalizing overrelaxation. We find the gluon propagator for the largest volumes and at q^2 ~ 0.01 GeV^2 to become flat. Although not excluded by our data, there is still no clear indication of a gluon propagator tending towards zero in the zero-momentum limit. New data for the ghost propagator are reported, too.
Bogolubsky I. L.
Ilgenfritz Ernst-Michael
Muller-Preussker Michael
Sternbeck André
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