WTO - a deterministic approach to $4$-fermion physics

Abstract

The program WTO, which is designed for computing cross sections and other relevant observables in the $e^{+}{e}^{-}$ annihilation into four fermions, is described. The various quantities are computed over both a completely inclusive experimental set-up and a realistic one, i.e. with cuts on the final state energies, final state angles, scattering angles and final state invariant masses. Initial state QED corrections are included by means of the structure function approach while final state QCD corrections are applicable in their {\it naive} formulation. A gauge restoring mechanism is included according to the Fermion-Loop scheme. The program structure is highly modular and particular care has been devoted to computing efficiency and speed.

55 LaTex pages. Submitted to Comput. Phys. Comm

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• The fermion-loop scheme for finite-width effects in e^+ e^- annihilation into four fermions
• WPHACT 1.0 - A program for $WW$, Higgs and 4 fermion physics at $e^{+}{e}^{-}$ colliders
• Precision Physics at LEP
• WPHACT 2.0: A fully massive Monte Carlo generator for four fermion physics at e^+ e^- colliders
• Unstable Particles and Non-Conserved Currents: a Generalization of the Fermion-Loop Scheme
• Semileptonic six fermion processes at future $e^{+}{e}^{-}$ colliders: signal and irreducible background for top and WWZ physics
• Single-W Production and Fermion-Loop Scheme: Numerical Results
• Non-conserved currents and gauge-restoring schemes in single W production
• Standard Higgs Boson Searches at LEP 2
• Complete Initial State QED Corrections to Off-Shell Gauge Boson Pair Production in e+e- Annihilation
• Anomalous W boson production at HERA
• Distributions in Four-Fermion Processes
• Fermion Loops, conserved currents and single-W