WPHACT 2.0:: A fully massive Monte Carlo generator for four fermion physics at e+e- colliders

WPHACT 2.0 is the new fully massive version of a MC program and unweighted event generator which computes all Standard Model processes with four fennions in the final state at e(+)e(-) colliders. The program can now generate unweighted events for any subset of all four fermion final states in a single run, by making use of dedicated pre-samples which can cover the entire phase space. Improvements with respect to WPHACT 1.0 include the Imaginary Fermion Loop gauge restoring scheme, new phase space mappings, a new input system, the possibility to compute subsets of Feynman diagrams and options for including ISR via QEDPS, running alpha(QED), CKM mixing, resonances in qq channels. (C) 2002 Elsevier Science B.V. All rights reserved.