Radiative large-angle Bhabha scattering in collinear kinematics

Abstract

The process of large-angle high energy electron-positron scattering with emission of one hard photon almost collinear to one of the charged particles momenta is considered. The differential cross section with radiative corrections due to emission of virtual and soft real photons calculated to a power accuracy is presented. Emission of two hard photons and total expressions for radiative correction are given in leading logarithmical approximation. The latter are illustrated by numeric estimates. A relation of the results with structure function formalism is discussed.

19 pp, LaTeX, uses epsfig package, 3 eps figs. Some small changes, including more explanations, addition of references and correction of misprints. Final version Accepted for publication, will appear on nuclear Physics B, issue 563 (1,2), cover date of the issue 6 December 1999