DYNAMICAL MASS AND GEODESIC MOTION

We show that even though particles with dynamically generated masses d o not have the standard point test particle energy-momentum tensor ass ociated with them, their motion in an external gravitational field is nonetheless geodesic. We discuss dynamically massive conformal perfect fluids and construct conformal invariant particle trajectories for th em, and show that such fluids behave just like standard kinematically massive perfect fluids in the particular conformal gauge in which the symmetry breaking field is taken to have a constant, spacetime indepen dent vacuum expectation value.