Relativistic Particle Dynamics

Abstract

It is shown that an instant form of relativistic particle dynamics can be constructed which displays the symmetry properties inherently present in the point form. In this new instant form, interaction terms are introduced in the energy momentum four-vector of the system; physically this is more justifiable than the more customary method of having interaction terms appear in the energy and the three generators of the Lorentz group which give the three infinitesimal displacements in velocity.