Study of deuteron-proton backward elastic scattering at intermediate energies

Abstract

We study deuteron- proton elastic scattering in the deuteron energy range between 500 MeV and 2 GeV at the cms scattering angle \theta^*\ge 140^\circ θ * ≥ 140 ∘ . The reaction is considered in the relativistic multiple scattering expansion framework. The four reaction mechanisms are included into consideration: one-nucleon exchange, single scattering, double scattering, and the term corresponding to the delta excitation in the intermediate state. The model is applied to describe the angular dependence of the differential cross section at the deuteron energies of between 880 and 1300 MeV. Also the energy dependence of the differential cross section and polarisation observables such as tensor analyzing power T_{20} T 20 and polarization transfer from the deuteron to proton \varkappa 𝜘 are considered at the scattering angle equal to 180 ^\circ ∘ . Contributions of the different reaction mechanisms into the reaction amplitude are demonstrated in comparison with the existing experimental data.