Is U(1) H a good family symmetry?
ABSTRACT: We analyze U(1)H as a horizontal symmetry and its possibilities to explain the known elementary-fermion masses. We find that only two candidates, in the context of SU(3)c ⊗ SU(2)L ⊗ U(1)Y ⊗ U(1)H nonsuper-symmetric, are able to fit the experimental result mb«mt. identity, but it is a commo...
- Autores:
-
Ponce Gutiérrez, William Antonio
Zepeda, Arnulfo
Mira Martínez, Jesús María
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 1996
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/13355
- Acceso en línea:
- http://hdl.handle.net/10495/13355
- Palabra clave:
- family
fermion
flavor
gauge field theory
group theory
supersymmetry
familia
supersimetria
- Rights
- openAccess
- License
- Atribución-NoComercial-SinDerivadas 2.5 Colombia
| Summary: | ABSTRACT: We analyze U(1)H as a horizontal symmetry and its possibilities to explain the known elementary-fermion masses. We find that only two candidates, in the context of SU(3)c ⊗ SU(2)L ⊗ U(1)Y ⊗ U(1)H nonsuper-symmetric, are able to fit the experimental result mb«mt. identity, but it is a common prejudice to assume that the appropriate family symmetry may explain this fact as a consequence of (i) and (ii). In what follows we will enlarge the SM gauge group with an extra U(1)H horizontal local gauge symmetry (the simplest multi-family continuous symmetry we can think of). We then show that the structure SU(3)c ⊗ SU(2)L ⊗ U(1)Y ⊗ U(1)H by itself is able to explain (ii), and that the simplest supersymmetric (SUSY) extension of this model without a μ-term can not cope with (ii). |
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