We develop a theoretical framework for calculation of high Q 2 exclusive electro-disintegration of A = 3 systems. The main result of this work is the calculation of the final state interaction of the struck energetic nucleon with recoil nucleons within the generalized eikonal approximation (GEA) which allows us to account for the finite and relatively large momenta of the bound nucleons in the nucleus. The important advantage of this approach is the possibility to study in a self-consistent way the short range correlations in nuclei. This is due to the fact that GEA does not require a stationary condition for recoil nucleons as conventional Glauber approximation does. As a result GEA treats explicitly the Fermi motion of recoil nucleons in the nucleus.

Based on the theoretical framework of generalized eikonal approximation we study the two-nucleon emission reactions in high Q 2 electro-disintegration of 3 He. Main aim is to investigate those features of the reaction which can be unambiguously identified with the short range properties of the ground state nuclear wave function. To evaluate the differential cross section we work in the formalism of the decay function which characterizes the property of the ground state wave function as well as the decay properties of final two nucleon spectator system. Our main motivation here is to explore the accessibility of two-and three-nucleon short range correlations in 3 He as well as to isolate unambiguously single and double rescattering processes in the reaction dynamics. Our analysis allowed us also to identify new approaches for investigating the role of the practically unknown three-nucleon forces in the ground state wave function of 3 He.

In addition to the high energy approximation this study exploited the exclusive nature of the process under investigation to gain more information about the SRCs.The description of the exclusive 3 He(e, e'NN)N reaction has been done using the formalism of the nuclear decay function, which is a practically unexplored quantity and is related to the conventional spectral function through the integration of the phase space of the recoil nucleons. Detailed investigation showed that the decay function clearly exhibits the main features of two-and three-nucleon correlations.Four highly practical types of SRCs in 3 He nucleus were discussed in great detail for different orders of the final state re-interactions using the decay function as an unique identifying tool.The overall conclusion in this dissertation suggests that the investigation of the decay function opens up a completely new venue in studies of short range nuclear properties.vi

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