Mechanism of proton-$^3{\rm He} $ elastic backward scattering at intermediate energy

We provide systematic analysis of the differential cross section of the proton-$^3{\rm He}$ elastic scattering at $\theta_{\rm cm}=180^{\circ}$ and at $T_p 150 MeV tree-body structure, including triplet and singlet states of the 2N pair, becomes of great importance for understanding energy dependence of the reaction observables. Prediction for the differential cross section and the polarization correlation $C_{00nn} which can be studied now in experiment are given. PACS number(s): 21.30.Cb, 21.30.-x, 25.40.Cm, 25.55.Ci