High-energy $e^{+}{e}^{-}$ photoproduction in the field of a heavy atom accompanied by bremsstrahlung

Abstract

Helicity amplitudes and differential cross section of high-energy $e^{+}{e}^{-}$ photoproduction accompanied by bremsstrahlung in the electric field of a heavy atom are derived. The results are exact in the nuclear charge number and obtained in the leading quasiclassical approximation. They correspond to the leading high-energy small-angle asymptotics of the amplitude. It is shown that, in general, the Coulomb corrections essentially modify the differential cross section as compared to the Born result. When the initial photon is circularly polarized the Coulomb corrections lead to the asymmetry in the distribution over the azimuth angles ${\phi }_i$ of produced particles with respect to the replacement ${\phi }_i\to -{\phi }_i$.

arXiv comment15 pages, 5 figures

References in corpus (11)

• Delbrück scattering at energies 140 - 450 MeV
• High-energy expansion of Coulomb corrections to the e+e- photoproduction cross section
• Quasiclassical approach to high-energy QED processes in strong laser and atomic fields
• Cross section of high-energy photon splitting in the electric fields of heavy atoms
• Coulomb corrections to bremsstrahlung in electric field of heavy atom at high energies
• Quasiclassical Green function and Delbruck scattering in a screened Coulomb field
• Quasiclassical Green function in an external field and small-angle scattering
• Charge asymmetry in the differential cross section of high-energy e+e- photoproduction in the field of a heavy atom
• High-energy $e^{+}{e}^{-}$ photoproduction cross section close to the end of spectrum
• Charge asymmetry in high-energy ${\mu }^{+}{\mu }^{-}$ photoproduction in the electric field of a heavy atom
• Angular distribution of high-energy $e^{+}{e}^{-}$ photoproduction close to the end of spectrum

Cited by in corpus (3)

• High-energy electroproduction in an atomic field
• Small-angle scattering and quasiclassical approximation beyond leading order
• Double bremsstrahlung from high-energy electron in the atomic field