SEMIANALYTICAL AND MONTE-CARLO RESULTS FOR THE PRODUCTION OF 4 FERMIONS IN E(-) COLLISIONS()E()

In view of the forthcoming experiments at high energy e(+)e(-) collide rs, LEP2 and beyond, the process e(+)e(-) --> W+W- --> 4f has been inv estigated for off-shell W's. After deriving the matrix element for the process within the helicity amplitude formalism, QED radiative correc tions to the initial state leptons have been included at the leading l ogarithmic level in the framework of the electron structure functions. Cross sections and distributions are computed by means of both a semi analytical and a Monte Carlo code, allowing for several cuts of experi mental interest. A Monte Carlo event generator has also been built, fo r simulation purposes. Some illustrative numerical results are include d and shortly described.