An Instanton Picture O.P.E. <A^2> Condensate?

Abstract

Gluon two- and three-point Green Functions computed in Landau gauge from the lattice show the existence of power corrections to the purely perturbative expressions, that can be explained through an Operator Product Expansion as the influence of a non gauge invariant mass dimension two condensate. The relationship of this condensate with topological properties of QCD, namely instantons, will be studied, giving a first estimate of the contribution of instantons to this condensate based in the direct lattice measure, after a cooling process, of the instanton liquid properties.

Lattice2002(topology) contribution, 3 pages, 2 figures

References in corpus (7)

• Non-perturbative quark mass renormalization in quenched lattice QCD
• On the Emerging Phenomenology of <(A_μ)^2>
• Consistent OPE Description of Gluon Two- and Three-point Green Function?
• Renormalizing a BRST-invariant composite operator of mass dimension 2 in Yang-Mills theory
• Instantons and $<A^2>$ Condensate
• Cooling, Physical Scales and Topology
• Remarks on the determination of the Landau gauge OPE for the Asymmetric three gluon vertex

Cited by in corpus (1)

• A two-component picture of the <A^2> condensate with instantons