A Green's function method for hadrons in nuclei

A partial review is given of the Green's function method for calculating inclusive and semi-inclusive cross sections for quasi-free processes where various hadrons are produced in nuclear targets. The general properties of the Green's function related to the energy spectrum of the system is discussed. It is shown that the method provides us with a unique way of studying hadrons in nuclei in the form of the final state interaction between the produced hadron and the residual nucleus. The method is applied to the Σ-hyperon production by (K-, π-) reactions on nuclei in connection with the possibility of observing Σ-hypernuclear states, the production of hadronic atoms where the strong interaction interferes with the Coulomb interaction giving rise to interesting phenomena and the high energy electron scattering in the quasi-elastic region associated with the nuclear or color transparency. (Author)