Relativistic Impulse Approximation, Nuclear Currents, and the Spin-Difference Function

Traditional nonrelativistic impulse-approximation treatments of $p$-nucleus scattering using a local nucleon-nucleon $t$ matrix neglect nuclear currents which are intrinsic to relativistic approaches also employing a local $t$ matrix. Inclusion of these current terms is essential to the understanding of the spin-difference function, $(D_{\mathrm{qk}}+D_{\mathrm{kq}})+i(P-Ay)\mathrm{}$, as shown by comparison with ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}(p, p^{\prime }){}_{}{}^{12}{}_{}{}^{}\mathrm{C}_{}^{*}{}_{}{}^{}(12.71\mathrm{} \mathrm{MeV}, 1^{+}, T=0)$ spin-difference data at 150 MeV.