Quasi-real electron method in high energy quantum electrodynamics

An electron pole approximation is presented, which can be used to calculate cross-sections in high energy quantum electrodynamics. A general derivation is given and some applications are considered : 1) bremsstrahlung in electron-electron (positron) collisions at large angles ; 2) photoproduction and electroproduction of a pair of particles on an electron at large angles ; 3) photon emission at a large angle when the cross-section does not decrease with energy ; 4) total cross-section for muon pair production in electron-positron collisions via one photon. The case of polarized particles is also discussed.

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