Off-the-energy-shell pp scattering in the exclusive proton knockout 12C(p,2p) reaction at 392 MeV

Abstract

The triple differential cross section (TDX) for the 12 C(p, 2p) proton knockout reaction from the 1p3/2 singleparticle state measured at 392 MeV is investigated by nonrelativistic distorted wave impulse approximation (DWIA) with accurate treatment of the kinematics of the colliding two protons and effects of in-medium modification to the matrix elements of the proton-proton (pp) effective interaction. Some simplifying approximations made in previous studies with DWIA are examined. The off-the-energy-shell matrix elements of the pp effective interaction are shown to play an essential role in describing the asymmetric two peaks of the measured TDX corresponding to the kinematics in which the momentum transfer is fixed.