Investigation of the light nuclei spin structure from hadronic channels at NUCLOTRON

Abstract

The investigation of the d, 3 H and 3 He spin structure has been performed at the RIKEN(Japan) accelerator research facility and VBLHEP(JINR) using both polarized and unpolarized deuteron beams. The experimental results on the analyzing powers studies in dp− elastic scattering, d(d, 3 H)p and d(d, 3 He)n reactions are presented. The vector and tensor analyzing powers for dp− elastic scattering at 880 and 2000 MeV are obtained at the Nuclotron(VBLHEP). The result on the analyzing powers A y , A yy of the deuteron at 2000 MeV are compared with relativistic multiple scattering model calculations. The data on the tensor analyzing powers for the d(d, 3 H)p and d(d, 3 He)n reactions obtained at E d = 200 and 270 MeV demonstrate the sensitivity to the 3 H, 3 He and deuteron spin structure. The essential disagreements between the experimental results and the theoretical calculations within the one-nucleon exchange model framework are observed. The wide experimental program on the study of the polar-ization effects in dp− elastic scattering, dp−nonmesonic breakup, d(d, 3 He)n, d(d, 3 H)p and d( 3 He, 4 He)p reactions using internal and extracted beam at Nuclotron is discussed.