Abstract

A recently proposed two-component model for deep-inelastic electroproduction, in which the generalized-vector-meson-dominance (GVMD) component was augmented by a component due to direct photon interaction with the valence quarks, is applied to the study of photon shadowing in nuclei. We calculate the effective number of nucleons (${A}_{\mathrm{eff}}$) as a function of the photon energy for various values of $\ensuremath{-}{q}^{2}$ and several nuclei in a GVMD model. The resulting photon-nucleus cross section as a function of energy is consistent with the data and the $\ensuremath{\rho}$-nucleon cross section is in agreement with expectations. The results for ${A}_{\mathrm{eff}}$ are in satisfactory agreement with experiment and represent an improvement of the pure GVMD result.

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