Published August 1, 2011
| Version v1
Journal article
Naturally large Yukawa hierarchies
Creators
- 1. INFN, Laboratori Nazionali di Frascati, Via Enrico Fermi 40, I-00044 Frascati, Italy, Departamento de Fisica Teorica, C-XI, Facultad de Ciencias, Universidad Autonoma de Madrid, C.U. Cantoblanco, 28049 Madrid, Spain, and Instituto de Fisica Teorica UAM/CSIC, Nicolas Cabrera 15, C.U. Cantoblanco, 28049 Madrid (Spain)
Description
The spontaneous breaking of the SU(3)5 quark/lepton flavor symmetry by means of three multiplets of scalar ''Yukawa fields'' admits vacua with one O(1) and two vanishing vacuum expectation values for each multiplet. If the number of generations is equal to three, and only in this case, the vanishing vacuum expectation values are lifted to exponentially suppressed entries by the inclusion of symmetry invariant logarithmic terms. A strong hierarchy for the Yukawa couplings and a quark mixing matrix that approaches a diagonal form are obtained in a natural way from O(1) parameters. This scenario provides a concrete realization of the minimal flavor violation hypothesis.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.84.036008;
- arXiv
- arXiv:1105.1770v2;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 84
- Journal Issue
- 3
- Journal Page Range
- p. 036008-036008.8
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 43079710
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- COUPLING; FLAVOR MODEL; HYPOTHESIS; LEPTONS; MULTIPLETS; QUARKS; SU-3 GROUPS; SYMMETRY; SYMMETRY BREAKING; YUKAWA POTENTIAL
- Descriptors DEC
- COMPOSITE MODELS; ELEMENTARY PARTICLES; FERMIONS; LIE GROUPS; MATHEMATICAL MODELS; NUCLEAR POTENTIAL; PARTICLE MODELS; POTENTIALS; QUARK MODEL; SU GROUPS; SYMMETRY GROUPS
Optional Information
- Notes
- (c) 2011 American Institute of Physics