Radiative Corrections on CC03

This note reports on a study at generator level about the eects that the improved knowledge of electroweak radiative corrections have on CC03 physics at LEP2. This study was possible thanks to the new O( ) generators in DPA that came out from the 2000 LEP2 Montecarlo workshop, allowing new, important insights of the eects full radiative corrections have on W physics observables. The results presented in this note should explain why it is mandatory to take into account the new O( ) codes in a MC generation for precision LEP2 physics and should give indications about a dieren t way to determine a systematic error due to radiation.