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

Abstract

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 fermions 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 q bar(q) channels.

38 pages, 5 figure: Version to be published in Comp.Phys.Comm

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• Measurement and Interpretation of Fermion-Pair Production at LEP energies above the Z Resonance
• Measurement of the Mass and Width of the W Boson in e+e- Collisions at sqrt{s} = 161 - 209 GeV
• Study of W boson polarisations and Triple Gauge boson Couplings in the reaction e+e- -> W+W- at LEP 2
• Helicity Formalism for Spin-2 Particles
• Four-fermion simulation at LEP2 in DELPHI
• Study of Triple-Gauge-Boson Couplings ZZZ, ZZgam and Zgamgam at LEP
• Measurements of CP-conserving Trilinear Gauge Boson Couplings WWV (V = gamma,Z) in e+e- Collisions at LEP2
• The Stau Neutralino Co-annihilation Region at an International Linear Collider
• Investigation of Colour Reconnection in WW Events with the DELPHI detector at LEP-2
• A Study of b bbar Production in e+e- Collisions at sqrt(s) = 130-207 GeV
• Lepton flavour violating processes at the International Linear Collider
• QED challenges at FCC-ee precision measurements
• PHASE, a Monte Carlo event generator for six-fermion physics at the LHC
• Search for single top quark production via contact interactions at LEP2
• PHASE - An event generator for six fermion physics at the LHC
• Measurement of the Tau Lepton Polarisation at LEP2
• Zgamma* production in e+e- interactions at sqrt{s} = 183 - 209 GeV
• Correlations between Polarisation States of W Particles in the Reaction e-e+ -> W-W+ at LEP2 Energies 189-209 GeV