The Landau-Pomeranchuk-Migdal effect in a thin target

TL;DR

This paper investigates the LPM effect for thin targets, accounting for medium polarization and transition radiation, providing a detailed qualitative analysis and comparison with recent experimental data.

Contribution

It extends the understanding of the LPM effect to thin targets, including polarization and transition radiation effects, with detailed qualitative discussion and experimental comparison.

Findings

LPM suppression occurs in thin targets at or below formation length.

Medium polarization and transition radiation significantly influence the effect.

Comparison shows good agreement with recent experimental results.

Abstract

The Landau, Pomeranchuk, Migdal (LPM) effect (suppression of the bremsstrahlung from high energy electron due to a multiple scattering of an emitting electron in dense media) is considered for the case when thickness of a target is of the order or less than the formation length of radiation. The effects of the polarization of a medium and transition radiation are taken into account as well. Qualitative picture of the phenomenon is discussed in detail. Comparison with recent experimental data is carried out.