Scaling analysis in multi-GeV electron scattering with a QHD model

Abstract

We analyse the behaviour of the experimental nuclear response in terms of the scaling variable y associated with a recently developed QHD model, implemented within the Fermi smearing approximation with binding effects on the struck nucleon introduced via the relativistic Hartree approximation (RHA). The theoretical scaling function obtained within this approach describes properly the trend of the experimental data built from recent CEBAF results on inclusive scattering of 4.05 GeV electrons on 56Fe, except at high values of Q2 and large negative values of y. It is suggested that a modification of our RHA model that produces a momentum dependence of the effective nucleon mass M* is needed in order to improve the agreement between the theoretical and experimental results, at this high momentum transfer regime.