Flavor Physics in the Randall-Sundrum Model: II. Tree-Level Weak-Interaction Processes

Abstract

A comprehensive analysis of tree-level weak interaction processes at low energy is presented for the Randall-Sundrum (RS) model with SU(2)_L * U(1)_Y bulk gauge symmetry and brane-localized Higgs sector. The complete form of the effective weak Hamiltonian is obtained, which results from tree-level exchange of Kaluza-Klein (KK) gluons and photons, the W^+- and Z^0 bosons and their KK excitations, as well as the Higgs boson. Exact expressions are used for the bulk profiles of the various fields, and for the exchange of entire towers of KK gauge-boson states. A detailed phenomenological analysis is performed for potential new-physics effects in neutral-meson mixing and in rare decays of kaons and B mesons, including both inclusive and exclusive processes. We find that while the predictions for Δ(F)=2 observables are rather model-independent, Δ(F)=1 processes depend sensitively on the exact realizations of the electroweak gauge and the fermionic sector. In this context, we emphasize that the localization of the right-handed top quark in the extra dimension plays a crucial role in the case of rare Z^0-mediated decays, as it determines the relative size of left- to right-handed couplings. We also extend earlier studies of quark flavor-changing neutral currents by examining observables which up to now attracted little attention. These include D-D(bar) mixing, B-->τν, B-->X_s (K^*) l^+ l^-, ε_K'/ε_K, B-->πK, B^0-->ϕK_S, B^0-->η' K_S, and B^+-->π^+π^0.

112 pages (sorry!), 22 figures; v2: Extended version of the JHEP publication

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• Anatomy of flavour-changing Z couplings in models with partial compositeness
• Direct and indirect signals of natural composite Higgs models
• FCNC Effects in a Minimal Theory of Fermion Masses
• Ultra Visible Warped Model From Flavor Triviality & Improved Naturalness
• Top-Quark Forward-Backward Asymmetry in Randall-Sundrum Models Beyond the Leading Order
• Leptons in Composite MFV
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• LHC Signals from Cascade Decays of Warped Vector Resonances
• Nonstandard Yukawa Couplings and Higgs Portal Dark Matter
• Strong Signatures of Right-Handed Compositeness
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• Prospects for Measurements with Strange Hadrons at LHCb
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• 5D Perspective on Higgs Production at the Boundary of a Warped Extra Dimension
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• Dipole operator constraints on composite Higgs models
• Constraining the flavor changing Higgs couplings to the top-quark at the LHC
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• Dynamical origin of flavor hierarchies in a warped extra dimension
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• Probing light top partners with CP violation
• Higgs Decay into Two Photons at the Boundary of a Warped Extra Dimension
• Flavour issues in warped custodial models: $B$ anomalies and rare $K$ decays
• Bulk RS models, Electroweak Precision tests and the 125 GeV Higgs
• Constraints on Scalar Leptoquark from Kaon Sector
• Covariant Description of Flavor Conversion in the LHC Era
• Flavour bounds on the flavon of a minimal and a non-minimal ${\mathcal{Z}}_2\times {\mathcal{Z}}_N$ symmetry
• Reducing Constraints in a Higher Dimensional Extension of the Randall and Sundrum Model
• Anarchy with linear and bilinear interactions
• SU(6) Gauge-Higgs Grand Unification: Minimal Viable Models and Flavor
• The Effective Lagrangian for Bulk Fermions in Models with Extra Dimensions
• Higgs Couplings and Phenomenology in a Warped Extra Dimension
• A warped relaxion
• LHC Signals for KK Graviton from an Extended Warped Extra Dimension
• LHC signals for Singlet Neutrinos from a Natural Warped Seesaw (I)
• Flavonic dark matter
• Partially composite supersymmetry
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• Impact of Warped Extra Dimensions on the Dipole Coefficients in $\mathbf{b}\to \mathbf{s\gamma }$ Transitions
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• FIMP Dark Matter from Flavon Portals
• Detecting Fourth Generation Quarks at Hadron Colliders
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• Finding flavons at colliders
• Warped Alternatives to Froggatt-Nielsen Models
• The supersymmetric flavour problem in 5D GUTs and its consequences for LHC phenomenology
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