Inhalt

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   Abstract
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   Contents
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   Introduction
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   Part I. General Overview & TheoreticalBackground
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  1. Grand Unified Theories
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   1.1 Selected Aspects of the Standard Model
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   1.2 Reasons for going Beyond the SM
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   1.3 Supersymmetry
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   1.4 Roadmap to Unification
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   1.4.1 SU(5) à la Georgi and Glashow
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   1.4.2 Complete Unification in SO(10)
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   1.4.3 Pati-Salam: an Alternative Route
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   1.4.4 Larger Groups
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  2. Flavour Symmetries; SM and Beyond
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   2.1 The Concept of Flavour
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   2.1.1 Flavour Symmetries
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   2.1.2 Yukawa Sector
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   2.2 Structure of Masses and Mixing in the SM
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  2.3. Theory of Neutrino Masses
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   2.3.1 See-Saw Mechanism
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   2.3.2 Double See-Saw
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   2.3.3 Sequential Right-Handed Neutrino Dominance
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   2.4 Flavour in GUTs
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   2.4.1 Flavour in Pati-Salam
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   Part II. Explicit Models of Flavour in Pati-Salam
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   3. PS-Breaking and Gauge Coupling Unification
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   3.1 Intermediate Symmetries and Scales
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   3.2 Particle Content and VEV Structure
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   3.3. Superpotential and Higgs Mechanism
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  3.4 Spectra and Phenomenology
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   3.4.1 Mass Matrix
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   3.4.2 The MSSM Higgs
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   3.4.3 The Multiplet F
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   3.4.4 Matter Couplings
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   3.5 Unification Conditions
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   3.6 Unification within Supersymmetry
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   3.6.1 General Overview
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   3.6.2 Class E
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   3.6.3 Class F
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   3.6.4 Classes A to D
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   3.7 Unification Without Supersymmetry
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   3.7.1 Class E
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   3.7.2 Class F
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   3.7.3 Class A to D
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   3.8 Summary
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  4. Effective Theory of Flavour
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   4.1 Model Framework
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  4.2 A Triplet-Flavon Model
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   4.2.1 Setup of the Model
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   Operator 4.2.1 Analysis
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   4.3 Larger Flavon Representations
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   4.4 Flavon Decuplet Model
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   4.4.1 Setup of the Model
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   4.4.2 Operator Analysis
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   4.4.3 Possible Variations
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   4.5 Summary
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   5. Gauged Flavour Symmetry
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   5.1. Motivation
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   5.2 Model Setup
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  5.3 Quark Flavour Sector
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   5.3.1 Approximate Flavour Structure
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   5.3.2 Diagonalising the Mass Matrix
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   5.3.3 Gauge Kinetic Terms
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   5.3.4 Higgs Coupling
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   5.4 Lepton Sector
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   5.4.1 Effective Ansatz
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   5.4.2 Single Scalar extension
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   5.4.3 GRV-like extension
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   5.4.4 Resulting Lepton Sector
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  5.5 Phenomenology of the Quark Sector
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   5.5.1 Setup of the Scan
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   5.5.2 Effects on the Flavour Parameter
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   5.6. Comments on a Supersymmetric Extension
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   5.7. Summary
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   6. Conclusions & Outlook
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   Appendix
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  A. Unification Model
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   A.1 Model Naming Scheme
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   A.2 Mass Matrices
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   A.3 Vacuum Expectation Values and Mass Scales
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   A.4 Beta-Function Coefficients
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  B. Low-Energy Flavour Model
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   B.1 Tensor Products of SU(3)
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   B.2 From U(1) to Z(N)
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  C. Low-Energy Flavour Symmetry Breaking
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   C.1 Gauge Anomalies
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   C.2 Calculation of S and T
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   C.3 Scan over Flavour Parameter
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   Bibliography
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   Danksagung
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   List of publications