Direct Instantons in QCD Nucleon Sum Rules

Details Direct Instantons in QCD Nucleon Sum Rules Direct Instantons in QCD Nucleon Sum Rules

1993-09-07

arxiv.org/abs/hep-ph/9309232v1

Phys.Rev.Lett. 71 (1993) 484-487

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, UMD PP#93-172

Scientific paper

10.1103/PhysRevLett.71.484

We study the role of direct (i.e. small-scale) instantons in QCD correlation
functions for the nucleon. They generate sizeable, nonperturbative corrections
to the conventional operator product expansion, which improve the quality of
both QCD nucleon sum rules and cure the long-standing stability problem, in
particular, of the chirally odd sum-rule.

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