Contents

• Abstract
• Acknowledgements
• List of Figures
• List of Tables
• The Standard Model
  • The Fundamental Particles
    • The Fermions
    • Bosons: The Force-carrying Particles
  • Spin, Helicity and Polarisation
  • The Electroweak Theory
  
  
• The LEP Accelerator and OPAL Detector
  • The LEP Accelerator
  • The OPAL Detector
    • Central Tracking Detector
    • The OPAL Magnet
    • The Time-Of-Flight Detector
    • Electromagnetic Calorimeter (ECAL)
    • Hadronic Calorimeter (HCAL)
    • Muon Chambers
    • Forward Detector (FD)
    • The Silicon-Tungsten Calorimeter (SW)
    • The OPAL Trigger
    • Data Acquisition
  
  
• Trilinear Gauge Boson Couplings and W-Pair Production.
  • The TGC Lagrangian
  • TGCs and W Pair Production at LEP
    • Polarisation of the W-Pair System
  • W Boson Decays
  • Polarisation Properties
    • The Two-Particle Joint Spin Density Matrix
    • The Single W Spin Density Matrix
  
  
• Application to Data Events
  • Calculating the SDM Elements
  • Calculating the Polarised Cross-Sections
  • Considerations for Real Events
  • Events with Final States
  
  
• Selection of Data
  • Background Events
    • Neutral Current Four-Fermion Production
    • The Background
    • The Two-Photon Background
  • Monte Carlo Generators
    • Four-Fermion Monte Carlo Generators
    • WW Monte Carlo Generators
    • Background Generators
    • Jet Fragmentation
    • Monte Carlo Samples Used
  • Detector Simulation
  • Data Selection and Reconstruction
    • Selection of Events
    • Event Reconstruction
    • 189 GeV Data Sample
  
  
• Extracting the TGCs
  • The Fit to the Single W SDM Elements
    • Overcoming Problems of Detector Effects.
    • Systematic Checks of the SDM Fit Method
  • The Fit to the Distribution
    • Systematic Checks of the Fit Method
  • The Combined Fit
  • Fit to Many Subsamples
  
  
• TGCs from 189 GeV Data
  • Fit to Single W SDM Elements
  • Fit to the Normalised Distribution
  • The Combined Fit
  • Including Systematics
  
  
• Method to Measure Polarised Cross-sections
  • Correcting for Detector Effects
  • Correction for Background
  
  
• Measurements of Polarised Cross-sections from Data
  • Individual W Polarised Cross-Sections
  • W-Pair Polarised Cross-Sections
  
  
• Evaluation of Systematic Uncertainties
  • Uncertainties in Electroweak Modelling
  • Jet Fragmentation
  • Jet Reconstruction
  • Background
  • Detector Simulation and Lepton Response
  • Overall Systematic Uncertainty
  
  
• Conclusions
  • Tests of CP-Invariance
  • Measurement of TGCs
  • Measurement of W Polarisation
  
  
• Summations to Calculate SDM Elements
  • Summation to Calculate Single W SDM Elements
  • Summation to Calculate Two-Particle Joint W SDM Elements
  
  
• Stability of the fit
• Bibliography
• About this document ...