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 sup posed to show a universal behavior at large momenta, dominated by shor t-range correlated pairs, or quasi-deuterons. We discuss whether the q uasi-deuteron universality survives the final state interaction effect s, which are present in the missing momentum spectra measured in A(e,e 'p) experiments at GeV energies. We demonstrate that in the observed m issing;momentum spectra an approximate universality is present, but or iginating from the universal pattern of diffractive final state intera ctions of the struck proton independent of the target nucleus.