ISBN: 3-540-66541-2
TITLE: Electroweak Precision Tests at LEP
AUTHOR: Hollik, Wolfgang; Duckeck, Gnter
TOC:

1. Theory of Precision Tests 1
1.1 The Electroweak Standard Model 2
1.1.1 The Standard Model Lagrangian 2
1.1.2 Gauge Fixing and Ghost Fields 7
1.1.3 Feynman Rules 8
1.2 Renormalization of the Electroweak Parameters 10
1.2.1 Basic Strategy 10
1.2.2 Mass Renormalization 12
1.2.3 Charge Renormalization 13
1.2.4 Implications for Electroweak Parameters 14
1.3 The Vector Boson Mass Correlation 20
1.3.1 One-Loop Corrections to the Muon Lifetime 20
1.3.2 Fermion Contributions to Delta r 22
1.3.3 Higher-Order Contributions24
1.3.4 Relation to Deep-Inelastic Neutrino Scattering 28
1.4 Electroweak Physics at the Z^0 Resonance29
1.4.1 Amplitudes and Effective Couplings 29
1.4.2 The Z^0 Lineshape 35
1.4.3 Z^0 Width and Partial Widths 39
1.4.4 Asymmetries 42
1.4.5 Accuracy of the Standard Model Predictions 45
1.5 Beyond the Minimal Model 47
1.5.1 Generalization of Self-Energy Corrections 47
1.5.2 Models with rho_tree notequal 1 50
1.5.3 Extra Z Bosons 52
1.5.4 The Minimal Supersymmetric Standard Model (MSSM) 54
2. Precision Measurements 57
2.1 LEP Collider and Detectors 58
2.1.1 The LEP Experiments 58
2.2 Z^0 Lineshape and Asymmetry 63
2.2.1 LEP Energy Determination 64
2.2.2 Luminosity Measurement 75
2.2.3 Event Selections 79
2.2.4 Lineshape Fit 90
2.2.5 Combination of the Lineshape and Asymmetry Measurements 92
2.2.6 Lineshape Results 94
2.3 Polarization Asymmetries 96
2.3.1 Tau Polarization 97
2.3.2 Polarization at the SLC 100
2.4 Heavy Quarks 103
2.4.1 Heavy-Quark Tagging 104
2.4.2 Rb Measurement 111
2.4.3 Rc Measurement 114
2.4.4 Results 116
2.5 Quark Asymmetries 117
2.5.1 Heavy-Quark Asymmetries 117
2.5.2 Inclusive Quark Asymmetries 121
2.6 Measurements at LEP2 122
2.6.1 Fermion Pair Production Above the Z 122
2.6.2 Mass of the W Boson 125
2.6.3 Search for the Higgs Boson 126
2.7 Other Electroweak Measurements 129
2.7.1 The Mass of the Top Quark 129
2.7.2 W Mass Measurements at Hadron Colliders 130
2.7.3 NeutrinoNucleon Scattering 131
3. Interpretation of the Measurements 133
3.1 Fermion Couplings133
3.1.1 Lepton Couplings 135
3.1.2 Coupling Parameters 136
3.1.3 Heavy-Quark Couplings 137
3.1.4 Electroweak Mixing Angle 138
3.2 Effect of Radiative Corrections 139
3.2.1 Epsilon Parameters 139
3.3 Number of Light Neutrino Species 141
3.4 Electroweak Fits 143
4. Conclusions 147
References 149
Index 159
END
