Spin-Orbit Effects in Medium-Energy (p,2p) Reactions

Recent distorted-wave impulse-approximation analyses of ($p$,$2p$) reactions induced by polarized and unpolarized protons have assumed that the spin-orbit parts of the distorting potentials can be omitted. Calculations which include spin-orbit terms for all three particles are compared with experimental data. In most cases the effects are small although there are noticeable changes in the case of ${}_{}{}^{40}{}_{}{}^{}\mathrm{Ca}$($p_{\mathrm{pol}}$,$2p$)${}_{}{}^{39}{}_{}{}^{}\mathrm{K}$ at 200 MeV.