Fermion masses and mixing in a 4+1 dimensional SU(5) domain-wall brane model
- School of Physics, University of Melbourne, Victoria 3010 (Australia)
We study the fermion mass and mixing hierarchy problems within the context of the SU(5) 4+1d domain-wall brane model of Davies, George, and Volkas. In this model, the ordinary fermion mass relations of SU(5) grand unified theories are avoided, since the masses are proportional to overlap integrals of the profiles of the electroweak Higgs and the chiral components of each fermion, which are split into different 3+1d hyperplanes according to their hypercharges. We show that the fermion mass hierarchy without electroweak mixing can be generated naturally from these splittings, that generation of the Cabibbo-Kobayashi-Maskawa matrix looks promising, and that the Cabibbo angle, along with the mass hierarchy, can be generated for the case of Majorana neutrinos from a more modest hierarchy of parameters. We also show that, under some assumptions made on the parameter space, the generation of realistic lepton mixing angles is not possible without fine-tuning, which argues for a flavor symmetry to enforce the required relations.
- OSTI ID:
- 21537462
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevD.83.056004; (c) 2011 American Institute of Physics; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CABIBBO ANGLE
CHIRALITY
FLAVOR MODEL
GRAND UNIFIED THEORY
HIGGS BOSONS
HIGGS MODEL
HYPERCHARGE
KOBAYASHI-MASKAWA MATRIX
MANY-DIMENSIONAL CALCULATIONS
MASS
M-THEORY
NEUTRINOS
SU-5 GROUPS
SYMMETRY
WEINBERG ANGLE
BOSONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
LEPTONS
LIE GROUPS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MATRICES
PARTICLE MODELS
PARTICLE PROPERTIES
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARK MODEL
SU GROUPS
SYMMETRY GROUPS
UNIFIED GAUGE MODELS