Four-Fermion Production in Electron-Positron Collisions
Martin W. Gruenewald, Giampiero Passarino, E. Accomando, A. Ballestrero, P. Bambade, D. Bardin, W. Beenakker, F. Berends, E. Boos, A. Chapovsky, A. Denner, S. Dittmaier, M. Dubinin, J. B. Hansen, V. Ilyin, S. Jadach, Y. Kurihara, M. Kuroda, E. Maina, G. Montagna, M. Moretti, O. Nicrosini, A. Olshevsky, M. Osmo, A. Pallavicini, C. G. Papadopoulos, H. T. Phillips, F. Piccinini, R. Pittau, W. Placzek, T. Riemann, M. Roth, A. S. Schmidt-Kaerst, Y. Shimizu, M. Skrzypek, R. Tanaka, M. Verzocchi, D. Wackeroth, B. F. L. Ward, Z. Was
Abstract
This report summarises the results of the four-fermion working group of the LEP2-MC workshop, held at CERN from 1999 to 2000. Recent developments in the calculation of four-fermion processes in electron-positron collisions at LEP-2 centre-of-mass energies are presented, concentrating on predictions for four main reactions: W-pair production, visible photons in four-fermion events, single-W production and Z-pair production. Based on a comparison of results derived within different approaches, theoretical uncertainties on these predictions are established.