MULTIPARTICLE INTERACTIONS IN BACKWARD PROTON PRODUCTION, SUBTHRESHOLD ANTIPROTON PRODUCTION, AND INCLUSIVE ELECTRON-SCATTERING FROM NUCLEI

The phenomena of backward proton emission and subthreshold antiproton production in the proton-nucleus interactions, and findings from the inclusive scattering of electrons from nuclei, are interpreted in terms of multiparticle interactions. Rates for multiparticle collisions are calculated using the results from many-body theory, with the products of the squared interaction amplitudes and Wigner functions. The rates for the processes with different number of particles are proportional to the different powers of spatial density. The many-body amplitudes are expanded in terms of propagators and elementary amplitudes with only two particles in the initial state. The leading processes are isolated on a tree level. They correspond to the expansion of a ground-state nuclear wave function. Reasonable agreement with data is obtained. © 1990 The American Physical Society.