Extremely high-energy bremsstrahlung in matter
Peter Arnold, Joshua Bautista, Omar Elgedawy, and Shahin Iqbal
TL;DR
This paper revisits the theory of high-energy bremsstrahlung in matter, focusing on the LPM effect and quantum pair production, providing a comprehensive analysis across ultra-relativistic energies.
Contribution
It offers a revised theoretical framework for bremsstrahlung at extremely high energies, including quantum effects that disrupt the LPM suppression.
Findings
Clarifies the role of quantum pair production in bremsstrahlung suppression.
Provides a unified analysis across a broad energy spectrum.
Enhances understanding of high-energy electron interactions in matter.
Abstract
The theory of bremsstrahlung by extremely high energy electrons passing through ordinary matter has been qualitatively incomplete. We revisit the suppression of bremsstrahlung by the Landau-Pomeranchuk-Migdal (LPM) effect, here accounting for quantum disruption of that effect from pair production. Our analysis covers the full range of ultra-relativistic electron and photon energies (subject to a few simplifying approximations).
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