https://doi.org/10.1140/epjc/s10052-009-1064-5
Regular Article - Theoretical Physics
Infrared gluon and ghost propagator exponents from lattice QCD
Dep. Física, Universidade de Coimbra, 3004-516, Coimbra, Portugal
* e-mail: orlando@teor.fis.uc.pt
Received:
22
January
2009
Revised:
27
April
2009
Published online:
4
June
2009
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 are well described by a pure power law with an infrared exponent κ∼0.53, in the Dyson–Schwinger notation. κ is measured using a technique that suppresses finite volume effects. This value is consistent with 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.
PACS: 12.38.-t – / 11.15.Ha – / 12.38.Aw – / 14.70.Dj –
© Springer-Verlag , 2009
