Solving the flavour problem with hierarchical fermion wave functions

Abstract

We investigate the flavour structure of generic extensions of the SM where quark and lepton mass hierarchies and the suppression of flavour-changing transitions originate only by the normalization constants of the fermion kinetic terms. We show that in such scenarios the contributions to quark FCNC transitions from dimension-six effective operators are sufficiently suppressed without (or with modest) fine tuning in the effective scale of new physics. The most serious challenge to this type of scenarios appears in the lepton sector, thanks to the stringent bounds on LFV. The phenomenological consequences of this scenarios in view of improved experimental data on quark and lepton FCNC transitions, and its differences with respect to the Minimal Flavour Violation hypothesis are also discussed.

14 pages, references added, minor changes, version accepted for publication

References in corpus (43)

• A Large Mass Hierarchy from a Small Extra Dimension
• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Final Report of the Muon E821 Anomalous Magnetic Moment Measurement at BNL
• Minimal Flavour Violation: an effective field theory approach
• Bulk Fields and Supersymmetry in a Slice of AdS
• Neutrino masses and mixings in non-factorizable geometry
• Hierarchies without Symmetries from Extra Dimensions
• Lepton-Flavor Violation via Right-Handed Neutrino Yukawa Couplings in Supersymmetric Standard Model
• Estimate of BR(B -> X_s gamma) at O(alpha_s^2)
• Model-independent constraints on Delta F=2 operators and the scale of New Physics
• Universal Unitarity Triangle and Physics Beyond the Standard Model
• Flavor Structure of Warped Extra Dimension Models
• Detailed calculation of lepton flavor violating muon-electron conversion rate for various nuclei
• Mass Matrix Models: The Sequel
• Mass Matrix Models
• Stitching the Yukawa Quilt
• Minimal Flavor Violation in the Lepton Sector
• Warped/Composite Phenomenology Simplified
• Two-Loop QCD Anomalous Dimensions of Flavour-Changing Four-Quark Operators Within and Beyond the Standard Model
• Flavor violation and warped geometry
• NNLO QCD corrections to the B -> X_s gamma matrix elements using interpolation in m_c
• New Bounds from Searching for Muonium to Antimuonium Conversion
• Next-to-Leading Order QCD Corrections to $\Delta F=2$ effective Hamiltonians
• Master Formulae for Delta F=2 NLO-QCD Factors in the Standard Model and Beyond
• New Search for tau -> mu gamma and tau -> e gamma Decays at Belle
• B-parameters of the complete set of matrix elements of (Delta B = 2) operators from the lattice
• Flavor from Minimal Flavor Violation & a Viable Randall-Sundrum Model
• Probing the Randall-Sundrum geometric origin of flavor with lepton flavor violation
• Connections between epsilon'/epsilon and Rare Kaon Decays in Supersymmetry
• Search for Lepton Flavor Violation in the Decay tau -> electron gamma
• Suppressing Flavor Anarchy
• Various definitions of Minimal Flavour Violation for Leptons
• Flavour physics of the RS model with KK masses reachable at LHC
• Flavor Violation in Warped Extra Dimensions and CP Asymmetries in B Decays
• Minimal Flavour Violation and Beyond
• Grand Unification and the Principle of Minimal Flavor Violation
• Lepton flavor violation in the Randall-Sundrum model with bulk neutrinos
• Next to Minimal Flavor Violation
• Flavor violation and extra dimensions
• Direct CP violation in K->3pi decays induced by SUSY chromomagnetic penguins
• Supersymmetric contributions to direct CP violation in K -> pi pi gamma decays
• Models and Phenomenology of Maximal Flavor Violation

Cited by in corpus (65)

• The Flavor of the Composite Pseudo-Goldstone Higgs
• Flavor Physics Constraints for Physics Beyond the Standard Model
• Flavor Physics in the Randall-Sundrum Model: I. Theoretical Setup and Electroweak Precision Tests
• Anatomy and Phenomenology of FCNC and CPV Effects in SUSY Theories
• Flavor Physics in the Quark Sector
• Higgs-mediated FCNCs: Natural Flavour Conservation vs. Minimal Flavour Violation
• The Hunt for New Physics at the Large Hadron Collider
• Higgs Mediated FCNC's in Warped Extra Dimensions
• On Partial Compositeness and the CP asymmetry in charm decays
• Towards the Identification of New Physics through Quark Flavour Violating Processes
• Flavor Physics in the Randall-Sundrum Model: II. Tree-Level Weak-Interaction Processes
• Constraints on two-lepton, two quark operators
• Flavor Violation Tests of Warped/Composite SM in the Two-Site Approach
• LHC Signals for Warped Electroweak Charged Gauge Bosons
• Composite Leptoquarks at the LHC
• Minimal Flavor Protection: A New Flavor Paradigm in Warped Models
• Combining Direct & Indirect Kaon CP Violation to Constrain the Warped KK Scale
• Electroweak and Flavour Structure of a Warped Extra Dimension with Custodial Protection
• An A4 flavor model for quarks and leptons in warped geometry
• Flavourful Production at Hadron Colliders
• Sequential Flavour Symmetry Breaking
• FCNC Effects in a Minimal Theory of Fermion Masses
• Ultra Visible Warped Model From Flavor Triviality & Improved Naturalness
• Minimal Flavor Violation in the Lepton Sector of the Randall-Sundrum Model
• Higgs bosons with large couplings to light quarks
• Extraordinary Phenomenology from Warped Flavor Triviality
• Dirac Neutrinos with $S_4$ Flavor Symmetry in Warped Extra Dimensions
• A Viable Randall-Sundrum Model for Quarks and Leptons with T' Family Symmetry
• A clockwork solution to the flavor puzzle
• Composite fermions in Electroweak Symmetry Breaking
• Aligned and Spontaneous Flavor Violation
• Flavor Alignment via Shining in RS
• On the Flavor Structure of Natural Composite Higgs Models & Top Flavor Violation
• Lepton Flavor Violation in Flavored Gauge Mediation
• Gauge Mediation beyond Minimal Flavor Violation
• On the significance of new physics in $b\to s{\ell }^{+}{\ell }^{-}$ decays
• New Physics Patterns in ${\epsilon }^{\prime }/\epsilon$ and ${\epsilon }_K$ with Implications for Rare Kaon Decays and $\Delta M_K$
• Relaxing Constraints from Lepton Flavor Violation in 5D Flavorful Theories
• Randall-Sundrum Reality at the LHC
• Rare semileptonic $B\to K(\pi )l_i^{-}{l}_j^{+}$ decay in vector leptoquark model
• Higgs-Radion Mixing with Enhanced Di-Photon Signal
• BR(Bs to mu+ mu-) as an electroweak precision test
• Supersymmetry phenomenology beyond the MSSM after 5/fb of LHC data
• Flavour in supersymmetry: horizontal symmetries or wave function renormalisation
• New physics in ε' from chromomagnetic contributions and limits on Left-Right symmetry
• A Flavor Protection for Warped Higgsless Models
• New Physics effects in charm meson decays involving $c\to u{l}^{+}{l}^{-}(l_i^{\mp }{l}_j^{\pm })$ transitions
• Shining Flavor and Radion Phenomenology in Warped Extra Dimension
• Impact of vector leptoquark on $\bar{B}\to {\bar{K}}^{\ast }{l}^{+}{l}^{-}$ anomalies
• Astrophysical Implications of a Visible Dark Matter Sector from a Custodially Warped-GUT
• High quality Nelson-Barr solution to the strong CP problem with $\theta =\pi$
• Electroweak constraints on flavorful effective theories
• Flavor-changing decays of the top quark in 5D warped models
• A Flavor Sector for the Composite Higgs
• Yukawa interactions, flavor symmetry, and non-canonical Kähler potential
• Residue theorem and summing over Kaluza-Klein excitations
• Flavor structure from `canonical' Yukawa interactions and `emergent' kinetic terms
• Neutrino-Mass Hierarchies and Non-linear Representation of Lepton-Flavour Symmetry
• Flavorful hybrid anomaly-gravity mediation
• Effective Theories for Flavour Physics beyond the Standard Model
• Chasing after flavor symmetries of quarks from bottom up
• A bottom-up approach to fermion mass hierarchy: a case with vector-like fermions
• Explaining Fermions Mass and Mixing Hierarchies through $U(1{)}_X$ and $Z_2$ Symmetries
• Charged lepton flavor violation associated with heavy quark production in deep inelastic lepton-nucleon scattering via scalar exchange
• Experimental Constraints on Heavy Fermions in Higgsless Models