Abstract
We investigate the interplay of reaction mechanism and structure effects in the calculated cross sections and polarization observables for the direct C12(p,2p) reaction near 400 MeV around the Quasi Free Scattering (QFS) kinematical condition. We do the first consistent comparison between the scattering observables obtained from solutions of three-body Faddeev/Alt-Grassberger-Sandhas (F/AGS) equations and from the Distorted-Wave Impulse Approximation (DWIA). We explore structure effects on the calculated observables, making use of one-nucleon spectroscopic overlaps obtained from the quantum Monte Carlo (QMC) many-body wave functions and using a Woods-Saxon parametrization with parameters adjusted to experimental (p,2p) data. We show, for the first time, that the two reaction formalisms exhibit a distinct behavior depending upon the kinematic conditions. We also show that the agreement between the experimental data and the theoretical results depends on the reaction formalism, kinematical conditions and optical model parametrizations in addition to the spectroscopic factors (SFs). The agreement between the data and predictions using QMC wave functions diminishes prominently for transitions to excited states of 11B.
Highlights
Particular attention has been devoted to the study of the knockout of a nucleon from a nucleus by the collision with a proton
The one-nucleon spectroscopic overlaps needed for describing the 12C(p, 2p) reaction leading to ground and low lying states of the residue, have been evaluated using quantum Monte Carlo (QMC) many-body wave functions generated from N N and N N N forces (Argonne V18 and Urbana X potentials – AV18/UX model) [20] in the work of [14]
We investigate the importance of many-body effects and reaction formalisms effects on the calculated observables with polarized and unpolarized beams
Summary
Particular attention has been devoted to the study of the knockout of a nucleon from a nucleus by the collision with a proton. The one-nucleon spectroscopic overlaps needed for describing the 12C(p, 2p) reaction leading to ground and low lying states of the residue, have been evaluated using QMC many-body wave functions generated from N N and N N N forces (Argonne V18 and Urbana X potentials – AV18/UX model) [20] in the work of [14].
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