The light nuclei spin structure from hadronic channels at intermediate energies

TL;DR

This paper investigates the spin structure of light nuclei using polarized and unpolarized deuteron beams at intermediate energies, providing experimental data on analyzing powers and comparing them with theoretical models.

Contribution

It presents new experimental measurements of analyzing powers in various deuteron-induced reactions at intermediate energies, highlighting discrepancies with existing theoretical models.

Findings

Analyzing powers measured at 880 and 2000 MeV show significant differences from model predictions.

Data demonstrate sensitivity of spin observables to the internal structure of 3H, 3He, and deuterons.

Experimental results reveal disagreements with the one-nucleon exchange model.

Abstract

The investigation of the d, 3H and 3He 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,3H)p and d(d,3He)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 Ay, Ayy 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,3H)p and d(d,3He)n reactions obtained at Ed = 200 and 270 MeV demonstrate the sensitivity to the 3H, 3He 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 polarization effects in dp- elastic scattering, dp-nonmesonic breakup, d(d,3He)n, d(d,3H)p and d(3He,4He)p reactions using internal and extracted beam at Nuclotron is discussed.