Modifying operator product expansions by non-perturbative non-locality

Details Modifying operator product expansions by non-perturbative non-locality Modifying operator product expansions by non-perturbative non-locality

2001-09-02

arxiv.org/abs/hep-ph/0109007v2

Phys.Lett. B520 (2001) 257-262

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 1 figure

Scientific paper

10.1016/S0370-2693(01)01166-2

Local quark-hadron duality violations in conventional applications of the operator product expansion are proposed to have their origin in the fact that the QCD vacuum or a hadronic state is not only characterized by nonvanishing expectation values of local, gauge invariant operators but also by finite correlation lengths of the corresponding gauge invariant $n$-point functions. Utilizing high-resolution lattice information on these correlators a non-perturbative component of OPE coarse graining is proposed which, in principle, allows for a determination of the critical dimension where the break-down of the expansion sets in.

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