Model for BCS-type correlations in superscaling

Using ideas from BCS descriptions of systems of fermions, a covariant extension of the relativistic Fermi gas model is presented as a way to incorporate correlation effects in nuclei. The model is developed for the BCS nuclear ground state and for final states consisting of a single plane-wave nucleon plus a BCS recoiling daughter nucleus. The nuclear spectral function is obtained, and from it the superscaling function for use in treating high-energy quasielastic electroweak processes. Interestingly, this model has the capability of yielding the asymmetric tail seen in the experimental scaling function.