Mechanism of proton-3 He elastic backward scattering at intermediate energy
A. P. Kobushkin, E. A. Strokovsky, K. Hatanaka, S. Ishikawa
Abstract
We provide systematic analysis of the differential cross section of the proton-3 He elastic scattering at θ cm=180 and at Tp<700 MeV. Three mechanisms are discussed: 2N pair exchange in the triplet and singlet spin states, pion exchange and direct mechanism. It is shown that t Tp>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 $C00nn which can be studied now in experiment are given. PACS number(s): 21.30.Cb, 21.30.-x, 25.40.Cm, 25.55.Ci
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