Landau-gauge condensates from the quark propagator on the lattice

Details Landau-gauge condensates from the quark propagator on the lattice Landau-gauge condensates from the quark propagator on the lattice

2004-08-26

arxiv.org/abs/hep-ph/0408309v3

Phys.Rev. D70 (2004) 097505

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, references added

Scientific paper

10.1103/PhysRevD.70.097505

We compute the dimension-2 condensate, , and the dimension-4 mixed condensate, <\bar q A q>, from the recent quenched lattice results for the quark propagator in the Landau gauge. We fit the lattice data to the Operator Product Expansion in the "fiducial" region 1.2 GeV < Q < 3 GeV. Our result for the dynamical gluon mass at the scale of 10 GeV^2 is m_A=600-650 MeV, in agreement with independent determinations. For the mixed Landau gauge condensate of dimension-4 we get alpha_s <\bar q g A q> = (-0.11 +/- 0.03) GeV^4. This value is an order of magnitude larger than the gluon condensate.

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