Abstract
The radiational corrections to the differential cross section of elastic electron—electron and electron—positron scattering in the center-of-mass system are determined in the fourth order of perturbation theory by quantum-electrodynamic methods. The contribution of two-photon exchange is determined in the static approximation for one of the colliding particles, taking subsequent account of the deflection of the second particle in the center-of-mass system. The presence of an annihilation channel in the two-photon exchange of electron—positron scattering leads to more intense soft-photon emission than in electron—electron scattering. Data from modern electron—positron colliders permit experimental verification of quantum electrodynamics at high energies.
Published Version
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