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Cross section of high-energy photon splitting in the electric fields of heavy atoms

R. N. Lee, A. I. Milstein, V. M. Strakhovenko

hep-pharXiv:hep-ph/9804386

Abstract

Various differential cross sections of high-energy photon splitting in the electric fields of heavy atoms are calculated exactly in the parameter . The consideration is based on the quasiclassical approach applicable for small angles between all photon momenta. The expressions obtained are valid for arbitrary transverse momenta of final photons . The detailed investigation of the process is performed taking into account the effect of screening . The exact cross section turns out to be noticeably smaller than the result obtained in the Born approximation.

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