Minimal Flavor Violation in the Lepton Sector of the Randall-Sundrum Model
arXiv:0804.2503 · doi:10.1016/j.physletb.2009.01.030
Abstract
We propose a realization of Minimal Flavor Violation in the lepton sector of the Randall-Sundrum model. With the MFV assumption, the only source of flavor violation are the 5D Yukawa couplings, and the usual two independent sources of flavor violation are related. In the limit of massless neutrinos, the bulk mass matrices and 5D Yukawa matrices are simultaneously diagonalized, and hence the absence of FCNCs. In the case of massive neutrinos, the contributions to FCNCs in the charged lepton sector are highly suppressed, due to the smallness of neutrino masses. In addition, the MFV assumption also allows suppressing one-loop charged current contributions to flavor changing processes by reducing the size of the Yukawa couplings, which is not possible in the generic anarchical case. We found that the first KK mass scale as low as ~ 3 TeV can be allowed. In both cases, we present a set of numerical results that give rise to realistic lepton masses and mixing angles. Mild hierarchy in the 5D Yukawa matrix of O(25) in our numerical example is required to be consistent with two large and one small mixing angles. This tuning could be improved by having a more thorough search of the parameter space.
12 pages, no figure; v2: clarifying remarks and references added; v3: version to appear in Phys. Lett. B
References in corpus (13)
- Warped Gravitons at the LHC and Beyond
- The Bulk RS KK-gluon at the LHC
- LHC Signals for Warped Electroweak Neutral Gauge Bosons
- Collider Signals of Top Quark Flavor Violation from a Warped Extra Dimension
- Searching for the Kaluza-Klein Graviton in Bulk RS Models
- Probing the Randall-Sundrum geometric origin of flavor with lepton flavor violation
- A GIM Mechanism from Extra Dimensions
- Flavour physics of the RS model with KK masses reachable at LHC
- Kaluza--Klein excitations of gauge bosons at the LHC
- Solving the flavour problem with hierarchical fermion wave functions
- Kaluza-Klein Gluons as a Diagnostic of Warped Models
- Top quark spin correlations in the Randall-Sundrum model at the CERN Large Hadron Collider
- Probing RS scenarios of flavour at LHC via leptonic channels
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- Minimal Flavor Protection: A New Flavor Paradigm in Warped Models
- A Simple Flavor Protection for RS
- Heavy Quarks Above the Top at the Tevatron
- An A4 flavor model for quarks and leptons in warped geometry
- Lepton Number Violation and W' Chiral Couplings at the LHC
- Electron-to-Tau Lepton Flavor Violation at the Electron-Ion Collider
- Low-scale warped extra dimension and its predilection for multiple top quarks
- CP violation and FCNC in a warped A4 flavor model
- SU(6) Gauge-Higgs Grand Unification: Minimal Viable Models and Flavor
- Warping the Universal Extra Dimensions
- Anarchic Yukawas and top partial compositeness: the flavour of a successful marriage