Instantons and Nucleon Magnetism
High Energy Physics - Phenomenology
2017-08-23 v1 Nuclear Theory
Abstract
We construct improved QCD sum rules for the nucleon magnetic moments by implementing direct-instanton contributions to the operator product expansion of the nucleon correlator in a magnetic background field. The instanton contributions are found to affect only those sum rules which had previously been considered unstable. The new sum rules show a high degree of stability and reproduce the experimental values of the nucleon magnetic moments for values of the magnetic quark condensate susceptibility which are consistent with other estimates.
Keywords
Cite
@article{arxiv.hep-ph/0009274,
title = {Instantons and Nucleon Magnetism},
author = {Hilmar Forkel},
journal= {arXiv preprint arXiv:hep-ph/0009274},
year = {2017}
}
Comments
10 pages, 2 figures. Invited talk given at "Hadron Physics 2000", Caraguatatuba, Sao Paulo, Brazil (April 10-15, 2000)