Growth of Interaction Between Antiprotons (Negative Hyperons) and Nuclei in Polarized Matter: The Possibility to Study the Spin-Dependent Part of the Forward Scattering Amplitude in the Range of Low-Energies

TL;DR

This paper explores how Coulomb interactions enhance spin rotation effects of negatively charged particles like antiprotons in polarized matter, enabling study of spin-dependent scattering at low energies where direct experiments are challenging.

Contribution

It demonstrates that Coulomb effects increase the observability of spin rotation in negatively charged particles, facilitating investigation of spin-dependent scattering amplitudes at low energies.

Findings

Spin precession frequency increases as particles decelerate.

Spin rotation remains observable despite rapid deceleration.

Provides a method to study spin-dependent scattering in low-energy regimes.

Abstract

The influence of Coulomb interaction on the phenomenon of "optical" spin rotation of negatively charged particles (antiprotons, etc.) moving in matter with polarized nuclei is considered. It is shown that because the density of the antiproton (negative hyperon) wave function on the nucleus increases, the spin precession frequency grows as the particle decelerates. As a result, spin rotation of negatively charged particles becomes observable despite their rapid deceleration. This provides information about the spin--dependent part of the amplitude of coherent elastic zero--angle scattering in the range of low energies, where scattering experiments are practically impossible to perform.