Antiproton scattering off $^3 He$ and $^4 He$ nuclei at low and intermediate energies

TL;DR

This paper investigates antiproton scattering on helium isotopes at low to intermediate energies using the Glauber-Sitenko approach, achieving good agreement with experimental data and providing predictions for polarized cross sections.

Contribution

It applies the Glauber-Sitenko model with Jülich $ar N N$ amplitudes to antiproton-helium scattering and predicts polarized cross sections including Coulomb effects.

Findings

Good agreement with experimental differential cross sections.

Predictions for polarized total cross sections for $ar p ^3$He.

Analysis of polarization buildup mechanisms.

Abstract

Antiproton scattering off $^3\He$ and $^4\He$ targets is considered at beam energies below 300 MeV within the Glauber-Sitenko approach, utilizing the $\bar N N$ amplitudes of the J\"ulich model as input. A good agreement with available data on differential $\bar p ^4\He$ cross sections and on $\bar p ^3\He$ and $\pbar ^4\He$ reaction cross sections is obtained. Predictions for polarized total $\bar p ^3$He cross sections are presented, calculated within the single-scattering approximation and including Coulomb-nuclear interference effects. The kinetics of the polarization buildup is discussed.