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arxiv: hep-lat/0703022 · v2 · submitted 2007-03-23 · ✦ hep-lat

Scaling behavior and positivity violation of the gluon propagator in full QCD

Patrick O. Bowman , Urs M. Heller , Derek B. Leinweber , Maria B. Parappilly , Andre Sternbeck , Lorenz von Smekal , Anthony G. Williams , Jianbo Zhang This is my paper
classification ✦ hep-lat
keywords gluonclearlydynamicaleffectsfullpositivitypropagatorquenched
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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.

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