UNIVERSAL PATTERN IN (E,E'P) AT LARGE MISSING MOMENTA - QUASI-DEUTERON OR DIFFRACTIVE FINAL-STATE INTERACTIONS

The intrinsic single particle momentum distributions in nuclei are supposed to show a universal behavior at large momenta, dominated by short-range correlated pairs, or quasi-deuterons. We discuss whether the quasi-deuteron universality survives the final state interaction effects, which are present in the missing momentum spectra measured in A(e,e'p) experiments at GeV energies. We demonstrate that in the observed missing;momentum spectra an approximate universality is present, but originating from the universal pattern of diffractive final state interactions of the struck proton independent of the target nucleus.