On the behavior of the nuclear spectral function at high momentum and removal energy

We propose a procedure to extrapolate the nuclear spectral function P(\k\, E) obtained from nonrelativistic many-body theory to large values of three- momentum and removal energy. Our approach is based on phenomenological info rmation extracted from both soft hadron-nucleus interactions; in the regime where the proton inclusive spectrum is dictated by Regge asymptotic, and d eep-inelastic lepton-nucleus collisions. The extrapolated P(\k\, E) is used to compute the semi-inclusive spectra of backward protons produced in elec tron-nucleus scattering.