NUCLEAR-BINDING EFFECTS IN RELATIVISTIC COULOMB SUM-RULES

We extend the formulation of relativistic Coulomb sum rules to account for the average effects of nuclear binding on the initial and final s tates of ejected nucleons. Relativistic interactions are included by u sing a Dirac representation adapted from a vector-scalar field theory. The scalar field reduces the effective nucleon mass M() and increase s the relativistic effects of recoil and Fermi motion. We consider two models for the off-shell behavior of the nuclear electromagnetic curr ent and demonstrate that the sum rule is accurate for applications to data over the interesting range of M() and three-momentum q. We furth er indicate that the form of the sum rule is sufficiently general to a ccommodate a broad class of off-shell form factor models.