Probing nucleon-nucleon correlations with (e; e0p) and (e; e0pp) reactions

Some of the recent attempts to detect signals of nucleon-nucleon corre-lations with semi-exclusive A(e; e0p) and exclusive A(e; e0pN) processes are reviewed. Unfactorized and distorted-wave calculations for these processes are discussed. The calculations implement two-body currents stemming from pion-exchange and intermediate excitation. The two-body cur-rents are shown to be highly competitive with the mechanisms related to nucleon-nucleon correlations. This observation seriously hampers at-tempts to link semi-exclusive A(e; e0p) measurements, which probe high missing energies, to the correlated part of the nuclear spectral function. Signals of central short-range correlations (SRC) have been detected in (e; e0pp) measurements on 12C and 16O, thereby conrming the picture that in hadronic matter SRC solely aect nucleon pairs with a small center-of-mass momentum and residing in a relative S state.