Reaction mechanism and characteristics of T₂₀ in d+ ³He backward elastic scattering at intermediate energies

For backward elastic scattering of deuterons by ³He, cross sections σ, and tensor analyzing power T₂₀ are measured at E_d = 140-270 MeV. The data are analyzed by the plane wave impluse approximation (PWIA) and by the general formula which includes virtual excitations of other channels, with the assumption of the proton transfer from ³He to the deuteron. Using ³He wave functions calculated by the Faddeev equation, the PWIA describes global features of the experimental data, while the virtual excitation effects are important for quantitative fits to the T₂₀ data. Theoretical predictions on T₂₀, K^y_y (polarization transfer coefficient), and C_yy (spin correlation coefficient) are provided up to GeV energies.