Sensitivity of the small-angle charge-exchange polarization-transfer reaction to spin-flip forces

We present a derivation of the zero-angle polarization transfer $K_y^y$ (0°) in charge exchange and inelastic scattering using direct-reaction theory with central and tensor spin-dependent forces. The energy dependence of the calculated polarization transfer is sensitive to the relative strengths of the spin-independent, central spin-spin, and tensor forces. Adjustment of the parameters of a purely central force cannot reproduce the calculated results for central-plus-tensor forces, giving rise to the hope that measurements of data of this type will allow one to distinguish between central spin-spin and tensor forces. Numerical results are presented for ${}_{}{}^{15}{}_{}{}^{}\mathrm{N}$, ${}_{}{}^{11}{}_{}{}^{}\mathrm{B}$, and ${}_{}{}^3{}_{}{}^{}\mathrm{H}\mathrm{}(p,n)\mathrm{}$ reactions.