Delta-isobar relativistic meson exchange currents in quasielastic electron scattering
J. E. Amaro, M. B. Barbaro, J. A. Caballero, T. W. Donnelly, A. Molinari
Abstract
We study the role of the Δ-isobar current on the response functions for high energy inclusive quasielastic electron scattering from nuclei. We consider a general Lagrangian which is compatible with contact invariance and perform a fully relativistic calculation in first-order perturbation theory for one-particle emission. The dependence of the responses upon off-shell parametrizations is analyzed and found to be mild. A discussion of scaling behaviour and a comparison with various non-relativistic approaches are also presented.
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