Authors
Citation
H. Forkel et Mk. Banerjee, DIRECT INSTANTONS IN QCD NUCLEON SUM-RULES, Physical review letters, 71(4), 1993, pp. 484-487
Citations number
30
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
71
Issue
4
Year of publication
1993
Pages
484 - 487
Database
ISI
SICI code
0031-9007(1993)71:4<484:DIIQNS>2.0.ZU;2-L
Abstract
We study the role of direct (i.e., small-scale) instantons in QCD corr
elation functions for the nucleon. They generate sizable nonperturbati
ve corrections to the conventional operator product expansion, which i
mprove the quality of both QCD nucleon sum rules and cure the long-sta
nding stability problem, in particular, of the chirally odd sum rule.