Lepton flavour violation in a minimal S3 -invariant extension of the Standard Model
After a brief review of some relevant results on lepton masses and mixings, that had previously been derived in the framework of a Minimal S3 -Invariant Extension of the Standard Model, we derive explicit analytical expressions for the matrices of the Yukawa couplings and compute the branching ratio...
| Autores: | , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2007 |
| País: | México |
| Recursos: | Universidad Nacional Autónoma de México |
| Repositorio: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57028300013 |
| Acesso em linha: | https://www.redalyc.org/articulo.oa?id=57028300013 |
| Access Level: | acceso abierto |
| Palavra-chave: | Física, Astronomía y Matemáticas Flavor symmetries neutrino masses and mixings flavour changing neutral currents quark and lepton masses and mixings |
| Resumo: | After a brief review of some relevant results on lepton masses and mixings, that had previously been derived in the framework of a Minimal S3 -Invariant Extension of the Standard Model, we derive explicit analytical expressions for the matrices of the Yukawa couplings and compute the branching ratios of some selected flavour changing neutral current processes as functions of the masses of the charged leptons and the neutral Higgs bosons. We find that the S3 × Z2 flavour symmetry and the strong mass hierarchy of the charged leptons strongly suppress the FCNC processes in the leptonic sector well below the present experimental upper bounds by many orders of magnitude. |
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