Multi-photon effects in energy losses spectra

Details Multi-photon effects in energy losses spectra Multi-photon effects in energy losses spectra

1998-05-06

arxiv.org/abs/hep-ph/9805231v1

Phys.Rev. D59 (1999) 056003

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX2.09, 19 pages, 5 PostScript figures

Scientific paper

10.1103/PhysRevD.59.056003

Effect of radiation of many photons by a single electron traversing a target is discussed. When the summary energy of emitted photons (the energy losses spectrum) is measured only, the photon spectrum is distorted comparing with the photon spectrum in one interaction. Influence of this effect is discussed for the cases (1) bremsstrahlung (described by Bethe-Heitler formula), (2) the strong Landau-Pomeranchuk-Migdal effect and (3) transition radiation. Qualitative picture of the phenomenon is discussed in detail. Comparison with the recent SLAC experiment in relatively thick target (2.7% of the radiation length), where the effect of emission of many photons by a projectile is very essential, shows perfect agreement of the theory and data.

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