Model-independent analysis of experimental baryon magnetic moments

Abstract

Strong disagreement between experimental hyperon magnetic moments and simple model predictions is exhibited in the function $R(p,{\Sigma }^{+},\Xi )=3\mathrm{}\frac{({\mu }_p-{\mu }_{{\Sigma }^{+}})}{({\mu }_{{\Xi }^{-}}-{\mu }_{{\Xi }^0})}=2.7\mathrm{}\pm 0.8$, an order of magnitude larger than the broken-SU(6) prediction 0.34. This is shown to imply quenching of contributions of nonstrange quarks in strange-baryon magnetic moments, relative to contributions in the nucleon. The model-independent analysis includes SU(6)-symmetry breaking, configuration mixing, relativistic corrections, and quark-diquark correlations.