Scaling behavior and positivity violation of the gluon propagator in full QCD
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- 9 November 2007
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 76 (9) , 094505
- https://doi.org/10.1103/physrevd.76.094505
Abstract
The Landau-gauge gluon propagator is studied using the coarse and fine dynamical MILC configurations. The effects of dynamical quarks are clearly visible and lead to a reduction of the nonperturbative infrared enhancement relative to the quenched case. Lattice spacing effects are studied and found to be small. The gluon spectral function is shown to clearly violate positivity in both quenched and full QCD.Keywords
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