Anomalous Magnetic Moments and Quark Orbital Angular Momentum

Abstract

We derive an inequality for the distribution of quarks with non-zero orbital angular momentum, and thus demonstrate, in a model-independent way, that a non-vanishing anomalous magnetic moment requires both a non-zero size of the target as well as the presence of wave function components with quark orbital angular momentum L_z>0.

Comments: 8 pages, to appear in Phys.Rev.D