Neutral particles with spin 1/2 and action-at-a-distance theory

The first example of the classical action-at-a-distance theory describing the electromagnetic interactions of neutral particles with spin 1/2 and an anomalous magnetic moment is presented. The fundamental role of supersymmetry in the construction of the presented theory is shown. A generalization to superparticles having an electric charge and an anomalous magnetic moment is considered. A new generalized minimality principle in superspace is revealed for supersymmetric Maxwell electrodynamics, including the electric charge and anomalous magnetic moment of particles with spin 1/2 on equal ground. copyright 1996 The American Physical Society