Infrared Gluon and Ghost Propagator Exponents From Lattice QCD

Details Infrared Gluon and Ghost Propagator Exponents From Lattice QCD Infrared Gluon and Ghost Propagator Exponents From Lattice QCD

2007-05-07

arxiv.org/abs/0705.0964v4

Eur.Phys.J.C62:525-534,2009

Physics

High Energy Physics

High Energy Physics - Lattice

Substantial rewriting with new material included. The new version includes a new and more deep discussion of the finite volume

Scientific paper

10.1140/epjc/s10052-009-1064-5

The compatibility of the pure power law infrared solution of QCD and lattice data for the gluon and ghost propagators in Landau gauge is discussed. For the gluon propagator, the lattice data is well described by a pure power law with an infrared exponent $\kappa \sim 0.53$, in the Dyson-Schwinger notation. $\kappa$ is measured using a technique that suppresses finite volume effects. This value implies a vanishing zero momentum gluon propagator, in agreement with the Gribov-Zwanziger confinement scenario. For the ghost propagator, the lattice data seem not to follow a pure power law, at least for the range of momenta accessed in our simulation.

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