On the Interpretation of the Processes 3He(e,e'p)2H and 3He(e,e'p)(pn) at High Missing Momenta

Abstract

It is shown that the effects of the Final State Interaction (FSI) in the exclusive processes 3He(e,e'p)2H and 3He(e,e'p)(pn), can be successfully treated in terms of a Generalized Eikonal Approximation (GEA), based upon the direct calculation of the Feynman diagrams describing the rescattering of the struck nucleon. As a matter of fact, using realistic three-body wave functions corresponding to the AV18 interaction, the results of our parameter free calculation exhibits a very satisfactory agreement with recent experimental data from Jlab covering the region of missing momentum and energy with p_m < 1.0 GeV/c and E_m < 100 MeV. It is demonstrated that the missing momentum dependence of the experimental cross section of the process 3He(e,e'p)2H is mainly governed at p_m < 0.2 GeV/c by the Plane Wave Impulse Approximation (PWIA), at 0.2 < p_m < 0.6 GeV/c by the single rescattering FSI, and at 0.6 GeV/c < p_m by the double rescattering FSI.

Two sentences added. To appear in Phys. Rev. Letters