Ground-state baryon magnetic moments

Abstract

We discuss small contributions to baryon magnetic moments which provide corrections to the simplest nonrelativistic-quark-model estimates. In particular, we consider configuration mixing of ${}_{}{}^2{}_{}{}^{}S_M^{}{}_{}{}^{}$ states into the ground states ${}_{}{}^2{}_{}{}^{}S_S^{}{}_{}{}^{}$, relativistic corrections to the additivity of quark moments, and isospin-violating effects. Although the "corrected" baryon magnetic moments are in better agreement with measurement, the agreement is not perfect; the remaining discrepancies are similar in size to those encountered in nuclear physics.