On the Flavor Problem in Strongly Coupled Theories - THEP Mainz

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34 Chapter 1. Introduction: Problems beyond the Standard Model at different distances from the SM brane. Even interactions between different bulk flavons can have a sizable effect and lead to hierarchies in the effective Yukawas. In the worst case, shining is an alternative description of MFV for a non-abelian scenario or directly related to a Froggatt Nielsen model (with λ now given by the distance between branes). In the best case, it can be a new tool to generate hierarchies dynamically (from bulk interactions).
2 The Randall Sundrum Model and its Holographic Interpretation The model considered in this thesis is a variation of the Randall-Sundrum (RS) model presented in Section 1.1. This model is enormously rich what concepts of model building is concerned. Following the original motivation [55], it can be understood as an extra dimensional theory with an Anti de Sitter metric in continuation of the idea of large extra dimensions. This point of view will be introduced in Section 2.1. It is also a model of strongly coupled composite fields, which becomes apparent in the light of the AdS/CFT correspondence, which will be comprehensively presented in Section 2.2. In the specific realization of the RS model that forms the basis of this thesis, all standard model fermions and gauge bosons are five dimensional fields, or in the language of the strongly coupled description, have composite admixtures (in a generalization of ρ photon mixing). The technical aspects of this field content will be the subject of Sections 2.3 and 2.4. Based on this setup and even more important in the context of the following chapters, the Randall-Sundrum model provides one of the best explanations for the Flavor structure in the SM we have today. The hierarchies in quark masses and mixing angles can be reproduced and associated therewith, FCNCs from higher dimensional operators are suppressed. In Section 2.5 will be explained how this works and the connection with the concept of partial compositeness as introduced in Section 1.1 will be established. 2.1 Why this and not that? The geometrical setup of the RS model has already been introduced in Section 1.1. This section serves to describe the motivation for this particular geometry and the choice of localization of the SM fields (whether they are bulk fields or why they should be confined to one brane or the other). On first sight, the metric in (1.49) seems to be constructed and the question arises if it corresponds to a generic approach to assume such a metric or if it is based on very special assumptions. In other words, is there some hidden tuning like in the case of large extra dimensions in the specific choice of the geometry? In order to check this, we will make the most general ansatz compatible with 4D Poincaré invariance and the Z2 orbifold symmetry, 1 ds 2 = GMNdx M dx N = a(φ) ηµνdx µ dx ν − b(φ) dφ 2 . (2.1) 1 Remember, that the orbifold is a necessity if one wants to describe chiral fermions in an odd number of spacetime dimensions.
Page 1 and 2: On the Flavor Problem in Strongly C
Page 3 and 4: UNIVERSITY OF MAINZ ABSTRACT THEORE
Page 5 and 6: Contents Acknowledgements vii Prefa
Page 7: Acknowledgements First and foremost
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84 Chapter 2. The Randall Sundrum M
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92 Chapter 3. Solving the Flavor Pr
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100 Chapter 3. Solving the Flavor P
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146 Chapter 4. The Asymmetry in Top
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176 Chapter 5. Conclusions describe
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178 Appendix A. Generating Paramete
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180 Appendix A. Generating Paramete
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182 Appendix B. Neutral Meson Mixin
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184 Appendix B. Neutral Meson Mixin
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C Input Parameters This appendix is
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Parameter Value ± Error Reference
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192 Appendix D. Higgs Potential for
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194 Bibliography [13] S. Dimopoulos
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196 Bibliography [43] G. Nordström
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198 Bibliography [72] K. S. Babu,
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200 Bibliography [104] R. Contino a
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202 Bibliography [133] M. Baak, M.
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204 Bibliography [160] J. Charles,
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206 Bibliography [185] C. Csaki, G.
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208 Bibliography [213] E. Thomson e
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210 Bibliography [239] V. Ahrens, A
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On the Flavor Problem in Strongly Coupled Theories - THEP Mainz

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