Consistent one-pion exchange currents in electron scattering from a relativistic Fermi gas
J. E. Amaro, M. B. Barbaro, J. A. Caballero, T. W. Donnelly, A. Molinari
Abstract
A set of fully relativistic one-pion-exchange electromagnetic operators is developed for use in one-particle emission reactions induced by electrons. To preserve the gauge invariance of the theory additional pionic correlation operators are required beyond the usual meson-exchange current operators. Of these, in the present work emphasis is placed on the self-energy current which is infinite and needs to be renormalized. The renormalized current is expanded to first order to obtain a genuine one-pion-exchange contribution to the inclusive responses.
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