QED INTERCONNECTION EFFECTS ON W MOMENTUM DISTRIBUTIONS AT LEP-2

The process e(+)e(-) --> W+W- --> <f(1)(f)over bar (2)><f(3)(f)over ba r (4)> contains charges in the initial, intermediate and final stages. This gives a rich selection of possible QED interconnection effects. Coulomb interaction is the simplest of these, and can thus be used to explore consequences. We study a number of experimental observables, w ith emphasis on those related to the W momentum distribution. Second-o rder Coulomb effects are shown to be practically negligible. The limit ed LEP 2 statistics will not allow detailed tests, so any theory uncer tainty will be reflected in the systematic error on the W mass. Curren tly the uncertainty from this source may be as high as 20 MeV.