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.