Flavor alignment via shining in Randall-Sundrum models

Journal Article · Thu Apr 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.075025· OSTI ID:21409526

Csaki, Csaba ^[1]; Perez, Gilad ^[2]; Surujon, Ze'ev ^[3]; Weiler, Andreas ^[4]

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1. Institute for High Energy Phenomenology, Newman Laboratory of Elementary Particle Physics, Cornell University, Ithaca, New York 14853 (United States)
2. Department of Particle Physics Weizmann Institute of Science, Rehovot 76100 (Israel)
3. Department of Physics, University of California at San Diego, La Jolla, California 92093 (United States)
4. CERN Theory Division, CH-1211 Geneva 23 (Switzerland)

We present a class of warped extra dimensional models whose flavor violating interactions are much suppressed compared to the usual anarchic case due to flavor alignment. Such suppression can be achieved in models where part of the global flavor symmetry is gauged in the bulk and broken in a controlled manner. We show that the bulk masses can be aligned with the down-type Yukawa couplings by an appropriate choice of bulk flavon field representations and TeV brane dynamics. This alignment could reduce the flavor violating effects to levels that allow for a Kaluza-Klein scale as low as 2-3 TeV, making the model observable at the LHC. However, the up-type Yukawa couplings on the IR brane, which are bounded from below by recent bounds on CP violation in the D system, induce flavor misalignment radiatively. Off-diagonal down-type Yukawa couplings and kinetic mixings for the down quarks are both consequences of this effect. These radiative Yukawa corrections can be reduced by raising the flavon vacuum expectation value on the IR brane (at the price of some moderate tuning), or by extending the Higgs sector. The flavor changing effects from the radiatively induced Yukawa mixing terms are at around the current upper experimental bounds. We also show the generic bounds on UV-brane induced flavor violating effects, and comment on possible additional flavor violations from bulk flavor gauge bosons and the bulk Yukawa scalars.

• OSTI ID: 21409526
• Journal Information: Physical Review. D, Particles Fields, Vol. 81, Issue 7; Other Information: DOI: 10.1103/PhysRevD.81.075025; (c) 2010 The American Physical Society; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANES
CERN LHC
CORRECTIONS
COUPLING
CP INVARIANCE
D QUARKS
EXPECTATION VALUE
FLAVOR MODEL
HIGGS BOSONS
HIGGS MODEL
INTERACTIONS
KALUZA-KLEIN THEORY
MASS
MIXING
SIMULATION
SYMMETRY
TEV RANGE 01-10
YUKAWA POTENTIAL
ACCELERATORS
BOSONS
COMPOSITE MODELS
CYCLIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
NUCLEAR POTENTIAL
PARTICLE MODELS
POSTULATED PARTICLES
POTENTIALS
QUARK MODEL
QUARKS
STORAGE RINGS
SYNCHROTRONS
TEV RANGE
UNIFIED-FIELD THEORIES