Axial Vector Current and Coupling of the Quark in the Instanton Model
High Energy Physics - Phenomenology
2009-11-07 v3 Nuclear Theory
Abstract
We compute the axial vector current, form factor, and coupling for quarks in the instanton liquid model with two light flavors. Non-local current corrections are derived, as required by the effective 't Hooft interaction. We obtain a pion-mediated axial form factor and an axial coupling which, when simply applied in the non-relativistic limit for constituent quarks, matches the experimental value to within a few percent, both in and out of the chiral limit.
Keywords
Cite
@article{arxiv.hep-ph/0208250,
title = {Axial Vector Current and Coupling of the Quark in the Instanton Model},
author = {G. W. Carter},
journal= {arXiv preprint arXiv:hep-ph/0208250},
year = {2009}
}
Comments
8 pages Revtex4, 3 PostScript figures, sign error corrected (results unchanged)