Impact of ${cal O}(alpha)$ radiative corrections on CC03 physics at LEP

In this work we report about the effect that the improved knowledge of electroweak radiative corrections, via the recent calculations of four-fermion processes with corrections in double pole approximation, has on WW physics at LEP2. Particular emphasis is given to the effects on differential distributions and their impact on the experimental observables. This study is based on generator comparisons using the new codes from the 2000 LEP2 Montecarlo workshop and allows new, important insights on the effects full radiative corrections have on W physics observables. The results presented here explain why it is so important to take these new calculations into account for precision measurements at LEP2. Received: 3 August 2001 / Revised version: 20 November 2001 / Published online: 18 January 2002