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Infrared Gluon Propagator from lattice QCD: results from large asymmetric lattices

P. J. Silva, O. Oliveira

hep-latarXiv:hep-lat/0511043

Abstract

The infrared limit of the lattice Landau gauge gluon propagator is studied. We show that the lattice data is compatible with the pure power law (q2)2 κ solution of the Dyson-Schwinger equations. Using various lattice volumes, the infinite volume limit for the exponent κ is measured. Although, the results allow κ= 0.498 - 0.525, the lattice data favours κ 0.52, which would imply a vanishing zero momentum gluon propagator.

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