The coherent scattering of a photon in a Coulomb field (Delbrück scattering) is considered for the momentum transfer Δ<<m in the frame of the quasiclassical operator method. In the high-energy region this process occurs over a rather long distance. The process amplitude is calculated taking into account the multiple scattering of particles of the intermediate electron-positron pair in a medium. The result is the suppression of the process. Limiting cases of weak and strong effects of the multiple scattering are analyzed. The approach used is the generalization of the method developed by the authors for the consideration of the Landau-Pomeranchuk-Migdal effect.
Physical Review D
- Pub Date:
- June 2001
- Electromagnetic processes and properties;
- Radiation by moving charges;
- High Energy Physics - Phenomenology
- LaTeX, 25 pages, 2 figures