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: | , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1996 |
| País: | Colombia |
| Institución: | Universidad de Antioquia |
| Repositorio: | Repositorio UdeA |
| Idioma: | inglés |
| OAI Identifier: | oai:bibliotecadigital.udea.edu.co:10495/13355 |
| Acceso en línea: | http://hdl.handle.net/10495/13355 |
| Access Level: | acceso abierto |
| Palabra clave: | family fermion flavor gauge field theory group theory supersymmetry familia supersimetria |
| Sumario: | 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). |
|---|