Proceedings of The XXV International Symposium on Lattice Field Theory — PoS(LATTICE 2007) · 2008 · 68 citations · 0 references
Natural SciencesPhysicsMathematical PhysicsParticle PhysicsTheoretical PhysicsElectroweak InteractionGauge InteractionsGauge TheoryQuantum ChromodynamicsQuantum Field TheoryElectroweak Gauge TheoryGauge FixingGluon DynamicsLattice Gauge TheoryLattice Gauge Theory SimulationRenormalization In Gauge TheoriesSimulated AnnealingSimulated Annealing Optimization
We present recent results on the Landau gauge gluon and ghost propagators in SU(3) pure gauge theory at Wilson = 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 to become flat at q 2 0.01 GeV 2 . 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.