Bremsstrahlung and pair production processes at low energies, multi-differential cross section and polarization phenomena

TL;DR

This paper analyzes bremsstrahlung and pair production at low energies, focusing on multi-differential cross sections and polarization effects in electron-proton scattering and photon-induced pair creation.

Contribution

It provides detailed calculations of polarized differential cross sections for bremsstrahlung and pair production, including effects of screening and polarization phenomena.

Findings

Photon polarization can be definite even with unpolarized electrons.

Differential cross sections depend on initial electron and photon polarization.

Screening effects influence the cross section calculations.

Abstract

Radiative electron-proton scattering is studied in peripheral kinematics, where the scattered electron and photon move close to the direction of the initial electron. Even in the case of unpolarized initial electron the photon may have a definite polarization. The differential cross sections with longitudinally or transversal polarized initial electron are calculated. The same phenomena are considered for the production of an electron-positron pair by the photon, where the final positron (electron) can be also polarized. Differential distributions for the case of polarized initial photon are given. Both cases of unscreened and completely screened atomic targets are considered.