Baryon Magnetic Moments and Axial Coupling Constants with Relativistic and Exchange Current Effects
Abstract
The large relativistic corrections to the constituent quark current operators improve the predictions for the axial couplings of the baryons, but worsen those for their magnetic moments. The exchange current corrections that are associated with flavor and spin dependent hyperfine interactions between the quarks with a form suggested by pseudoscalar meson exchange can compensate the relativistic corrections to the baryon magnetic moments. This is demonstrated by a calculation of the magnetic moments of the non-strange and strange baryons using wave functions and exchange current operators, which correspond to a recent phenomenological spin- and flavor dependent interquark interaction model with a linear confining interaction, which yields a spectrum close to the empirical one. The possibility that part of the flavor and spin dependent interaction could be due to vector and axial-vector exchange is explored.
Keywords
Cite
@article{arxiv.hep-ph/9610384,
title = {Baryon Magnetic Moments and Axial Coupling Constants with Relativistic and Exchange Current Effects},
author = {K. Dannbom and L. Ya. Glozman and C. Helminen and D. O. Riska},
journal= {arXiv preprint arXiv:hep-ph/9610384},
year = {2009}
}
Comments
Confinement exchange current contribution included, results improved, coauthor list expanded