Direct Instantons in QCD Nucleon Sum Rules

A.A. Belavin; A.A. Ovchinnikov; A.E. Dorokhov; B.L. Ioffe; B.L. Ioffe; C.G. Callen, Jr.; D. B. Leinweber; D. Espriu; D.G. Caldi; D.I. Diakonov; E.V. Shuryak; E.V. Shuryak; E.V. Shuryak; E.V. Shuryak; E.V. Shuryak; E.V. Shuryak; G. 't Hooft; G. 't Hooft; Hilmar Forkel; J.D. Bjorken; M. Abramowitz; M. C. Chu; M.A. Shifman; M.A. Shifman; M.S. Dubovikov; Manoj K. Banerjee; V.M. Belyaev; Y. Chung

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Direct Instantons in QCD Nucleon Sum Rules

Authors: A.A. Belavin
A.A. Ovchinnikov
A.E. Dorokhov
B.L. Ioffe
B.L. Ioffe
Jr. C.G. Callen
D. B. Leinweber
D. Espriu
D.G. Caldi
D.I. Diakonov
E.V. Shuryak
E.V. Shuryak
E.V. Shuryak
E.V. Shuryak
E.V. Shuryak
E.V. Shuryak
G. 't Hooft
G. 't Hooft
Hilmar Forkel
J.D. Bjorken
M. Abramowitz
M. C. Chu
M.A. Shifman
M.A. Shifman
M.S. Dubovikov
Manoj K. Banerjee
V.M. Belyaev
Y. Chung
Publication date: 1 January 1993
Publisher: 'American Physical Society (APS)'
Doi

Abstract

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.Comment: 10 pages, UMD PP#93-17

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