General study of superscaling in quasielastic $(e,e^{\prime })$ and $(\nu ,\mu )$ reactions using the relativistic impulse approximation

Abstract

The phenomenon of superscaling for quasielastic lepton induced reactions at energies of a few GeV is investigated within the framework of the relativistic impulse approximation. A global analysis of quasielastic inclusive electron and charged-current neutrino scattering reactions on nuclei is presented. Scaling and superscaling properties are shown to emerge from both types of processes. The crucial role played by final state interactions is evaluated by using different approaches. The asymmetric shape presented by the experimental scaling function, with a long tail in the region of positive values of the scaling variable, is reproduced when the interaction in the final state between the knockout nucleon and the residual nucleus is described within the relativistic mean field approach. The impact of gauge ambiguities and off-shell effects in the scaling function is also analyzed.

34 pages, 14 figures, accepted in Phys. Rev. C. Section II has been shortened

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• Elastic and quasi-elastic electron scattering off nuclei with neutron excess
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