Parity nonconservation effect in the resonance elastic electron scattering on heavy He-like ions

TL;DR

This paper studies how parity nonconservation effects can be enhanced in elastic electron scattering on heavy He-like ions by tuning electron energy to resonance, with implications for detecting fundamental symmetry violations.

Contribution

It introduces a method to amplify parity violation signals in electron-ion scattering by exploiting resonance with doubly-excited states.

Findings

Parity violation effects can be significantly enhanced at resonance energies.

Two experimental scenarios for detecting polarization effects are analyzed.

Potential for improved measurements of fundamental symmetry violations.

Abstract

We investigate the parity nonconservation effect in the elastic scattering of polarized electrons on heavy He-like ions, being initially in the ground state. The enhancement of the parity violation is achieved by tuning the energy of the incident electron in resonance with quasidegenerate doubly-excited states of the corresponding Li-like ion. We consider two possible scenarios. In the first one we assume that the polarization of the scattered electron is measured, while in the second one it is not detected.