INITIAL-STATE QED CORRECTIONS TO 4-FERMION PRODUCTION IN E- COLLISIONS AT LEP200 AND BEYOND(E)

The implementation of QED initial-state radiative corrections in the p rocess of four-fermion production at LEP200 and higher-energy e(+)e(-) colliders is discussed. Because of the presence of charged-current pr ocesses, this is a nontrivial problem, and we compare our approach wit h other existing treatments. We describe the Monte Carlo algorithm use d for the generation of four-fermion events with photon bremsstrahlung . Comparison between our event generator and semi-numerical calculatio ns are presented, as well as predictions for W- and Z-pair related cro ss sections.