Recent BNL and Jlab data provided new evidence on two nucleon correlations (2NC) in nuclei. The data confirm the validity of the convolution model, describing the spectral function (SF) of a correlated pair moving in the mean field with high and low
relative and center-of-mass (cm) momenta, respectively. The model is built assuming that the wave function (WF) of a nucleus A, describing a configuration where the cm momentum of a correlated pair is low and its relative momentum is high, factorizes into the product of the two-body WF and that of the A-2 system. Such a factorization has been shown to occur in nuclear matter (NM). Here it is shown that few-body systems exhibit factorization, which seems to be therefore a general property, to be reproduced also in studies of the WF of finite nuclei.
The interpretation of recent Jlab experimental data on the exclusive process A(e,ep)B off few-nucleon systems are analyzed in terms of realistic nuclear wave functions and Glauber multiple scattering theory, both in its original form and within a gen
eralized eikonal approximation. The relevance of the exclusive process 4He(e,ep)^3H for possible investigations of QCD effects is illustrated.
A detailed analysis of the effect of tensor correlations on one- and two-body densities and momentum distributions of complex nuclei is presented within a linked cluster expansion providing reliable results for the ground state properties of nuclei calculated with realistic interactions.
Recent JLab experimental data on quasi elastic 3He(e,ep)2H(pn) and 4He(e,ep)3H processes are interpreted using an approach based upon realistic wave functions and Glauber multiple scattering theory within a generalized eikonal approximation (GEA). Th
e results of a non factorized calculation of the left-right asymmetry A_{TL} of the process 3He(e,ep)2H, obtained using the full covariant form of the electromagnetic operator, are also presented.
