Spin-dependent part of $p\bar{p}$ interaction cross section and Nijmegen potential

TL;DR

This paper calculates the spin-dependent proton-antiproton interaction cross sections using the Nijmegen potential and explores how these interactions can be used to polarize antiprotons in a storage ring through filtering.

Contribution

It introduces a detailed calculation of spin-dependent cross sections for p-anti-p interactions and demonstrates their application in polarization buildup in storage rings.

Findings

Filtering mechanism can produce noticeable polarization within beam lifetime.

Spin-dependent cross sections are effectively modeled using Nijmegen potential.

Polarization buildup is feasible with realistic storage ring parameters.

Abstract

Low energy $p\bar{p}$ interaction is considered taking into account the polarization of both particles. The corresponding cross sections are calculated using the Nijmegen nucleon-antinucleon optical potential. Then they are applied to the analysis of the polarization buildup which is due to the interaction of stored antiprotons with polarized protons of a hydrogen target. It is shown that, at realistic parameters of a storage ring and a target, the filtering mechanism may provide a noticeable polarization in a time comparable with the beam lifetime.