Missing momentum distributions and nuclear transparency in   semi-inclusive A(e,e'p)X processes
  A linked cluster expansion for the distorted one-body mixed density matrix is obtained within the Glauber multiple scattering theory with correlated wave functions. The nuclear transparency for 16O is calculated using realistic central and non-central correlations. The convergence of the expansion is investigated in the case of 4He for which the transparency and the distorted momentum distributions are calculated to all order in the correlations using a variational wave function obtained from realistic NN interactions. The important role played by non central correlations is illustrated. 
C. Ciofi degli Atti (Perugia Univ.), H. Morita (Sapporo Gakuin Univ.),   D. Treleani (Trieste Univ.)