On the Flavor Problem in Strongly Coupled Theories - THEP Mainz
On the Flavor Problem in Strongly Coupled Theories - THEP Mainz
On the Flavor Problem in Strongly Coupled Theories - THEP Mainz
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Contents<br />
Acknowledgements vii<br />
Preface ix<br />
1 Introduction: <strong>Problem</strong>s beyond <strong>the</strong> Standard Model 1<br />
1.1 Solutions to <strong>the</strong> Gauge Hierarchy <strong>Problem</strong> . . . . . . . . . . . . . . . . 3<br />
Supersymmetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4<br />
Technicolor and Composite Higgs Models . . . . . . . . . . . . . . . . 7<br />
Technicolor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7<br />
Partial Compositeness . . . . . . . . . . . . . . . . . . . . . . . 14<br />
Composite Higgs . . . . . . . . . . . . . . . . . . . . . . . . . . 17<br />
Collective Symmetry Break<strong>in</strong>g . . . . . . . . . . . . . . . . . . 18<br />
Extra Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21<br />
Flat Extra Dimensions . . . . . . . . . . . . . . . . . . . . . . . 21<br />
Warped Extra Dimensions . . . . . . . . . . . . . . . . . . . . . 25<br />
1.2 Solutions to <strong>the</strong> <strong>Flavor</strong> <strong>Problem</strong> . . . . . . . . . . . . . . . . . . . . . 27<br />
Abelian <strong>Flavor</strong> Symmetries . . . . . . . . . . . . . . . . . . . . . . . . 29<br />
Non Abelian <strong>Flavor</strong> Symmetry . . . . . . . . . . . . . . . . . . . . . . 32<br />
2 The Randall Sundrum Model and its Holographic Interpretation 35<br />
2.1 Why this and not that? . . . . . . . . . . . . . . . . . . . . . . . . . . 35<br />
2.2 AdS/CFT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40<br />
The Holographic Dual of <strong>the</strong> M<strong>in</strong>imal RS Model . . . . . . . . . . . . 49<br />
The Holographic Dual of Higgsless, Custodially Protected, Composite<br />
Higgs and Little Higgs <strong>Theories</strong> . . . . . . . . . . . . . . . . . . 51<br />
2.3 Profiles of Gauge Bosons . . . . . . . . . . . . . . . . . . . . . . . . . . 54<br />
The Electroweak Gauge Sector of <strong>the</strong> SM . . . . . . . . . . . . . . . . 65<br />
2.4 Profiles of Fermions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69<br />
Bulk Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76<br />
2.5 Hierarchies <strong>in</strong> Quark Masses and Mix<strong>in</strong>gs and <strong>the</strong> RS GIM Mechanism 78<br />
Hierarchic Quark Masses and Mix<strong>in</strong>gs from Anarchic Fundamental Parameters<br />
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78<br />
The RS-GIM Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . 83<br />
2.6 Four Fermion Interactions . . . . . . . . . . . . . . . . . . . . . . . . . 88<br />
3 Solv<strong>in</strong>g <strong>the</strong> <strong>Flavor</strong> <strong>Problem</strong> <strong>in</strong> <strong>Strongly</strong> <strong>Coupled</strong> <strong>Theories</strong> 91<br />
3.1 Electroweak Precision Observables . . . . . . . . . . . . . . . . . . . . 92<br />
Oblique Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93<br />
Corrections to Z → b ¯ b . . . . . . . . . . . . . . . . . . . . . . . . . . . 96