Final state interactions in the nuclear response at large momentum transfer

The convolution approach, widely employed to describe final state interactions in the response of many-body systems, is derived from the expression of the nuclear response in the zeroth-order ladder approximation. Within this framework, the folding function, accounting for the effects of interactions between the struck particle and the spectator system, can be immediately related to the spectral function of particle states.The role of nucleon-nucleon correlations in determining the energy dependence is analyzed.