List of Figures

    2.1 Lowest Order Feynman Diagrams for the Process e⁺e^-Ž nng.
    2.2 Single Photon Spectra for the Process e⁺e^-Ž n ng.
    2.3 The Experimental Setup for the Process e⁺e^-Ž n ng.
    3.1 Schematic Layout of the LEP Collider.
    3.2 The Acceleration System of the LEP Collider.
    3.3 Schematic Layout of the LEP Beam Pipe.
    3.4 General View of the OPAL Detector.
    3.5 Detailed View of the OPAL Subdetectors.
    3.6 Schematic View of the OPAL Magnet System.
    3.7 Schematic View of Central Vertex Chamber.
    3.8 Schematic View of Central Jet Chamber.
    3.9 Schematic View of Central Jet Chamber.
    3.10 The Truncated Mean Energy Loss in CJ.
    3.11 Schematic View of the Presampler Calorimeter.
    3.12 Schematic View of the Electromagnetic Calorimeter.
    3.13 The Cross-Section of a Lead Glass Block.
    3.14 The Forward Detector Cross-Section.
    3.15 The Feynman Diagrams for Bhabha Scattering.
    4.1 The Data Acquisition System.
    4.2 Trigger Generation by the q-f Matrix.
    4.3 The General Event Trigger.
    4.4 Typical Single Photon Event in OPAL.
    4.5 Typical Single Electron Event in OPAL.
    5.1 Radiative Bhabha Scattering Modelled by the TEEGG Monte Carlo.
    5.2 Resonance Production via the Two-Photon Process.
    5.3 Fermion-Pair Production via the Two-Photon Process.
    5.4 The Simulation System of the OPAL Experiment.
    5.5 The Simulation of the Central Detector.
    5.6 The Simulation of the Electromagnetic Barrel Calorimeter.
    6.1 The Df and Dq for the Single Photon and Electron Candidates.
    6.2 The Spectra for the Presampler Calorimeter Criterion.
    6.3 The Single Photon Candidates and Random Events in CV and CJ.
    6.4 The Single Photon Candidates and Total Backgrounds for the FD.
    6.5 The Single Photon Candidates and Random Beam Crossing Events in HB and HE.
    6.6 Comparison of Fully Simulated Monte Carlo and Data in EB.
    6.7 Comparison of the Simulation Corrected Four-vectors and Data in EB.
    6.8 The Photon Spectra with the Optimized Angular Cut in EE.
    6.9 The Photon Spectra with Optimized p_t Cut in EE.
    7.1 Energy Loss and Resolution of the Single Photon Monte Carlo
    7.2 Single Photon Energy Loss and Resolution.
    7.3 Single Electron Spectra in the Barrel
    7.4 Single Electron Spectra in the Endcap
    7.5 Single Electron Energy Loss and Resolution
    8.1 TOF and EM Single Electron Trigger Efficiencies.
    9.1 Tagging Efficiency of the Forward Detector.
    9.2 Backgrounds from Cosmic and Beam Sources.
    9.3 Tagged Single Photon Events.
    10.1 Single Photon Spectra for the First Sample.
    10.2 Single Photon Spectra for the Second Sample.
    10.3 The Single Photon Total Cross-Sections.
    10.4 Fit to the Number of Observed Single Photon Events.
    A.1 The Kinematics and Feynman Diagram for \unhbox \voidb@x e⁺e^-Ž e⁺e^-m⁺m^-.
    B.1 The e⁺e^- Cross-section at LEP.
    C.1 The Feynman Diagrams for O(a) QED Corrections to e⁺e^-Ž f[`(f)]
    C.2 Propagator Corrections to e⁺e^-Ž f[`(f)]
    C.3 Vertex Corrections and Box Contributions to e⁺e^-Ž f[`(f)]
    C.4 The Vertex Correction and Fermion Self-energy Interactions

Edward G. Heflin. Š2001. All rights reserved.