Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.21/4973
Título: Constraining multi-Higgs flavour models
Autor: Felipe, Ricardo Gonzalez
Ivanov, I. P.
Nishi, C. C.
Seródio, Hugo
Silva, João Paulo
Palavras-chave: Discrete Symmetries
CP Violation
Data: Jul-2014
Editora: Springer
Citação: GONZÁLEZ FELIPE, Ricardo Jorge; [et al] – Constraining multi-Higgs flavour models. European Physical Journal C. ISSN: 1434-6044. Vol. 74, nr. 7 (2014), Art. nr. 2953
Relatório da Série N.º: 2953
Resumo: To study a flavour model with a non-minimal Higgs sector one must first define the symmetries of the fields; then identify what types of vacua exist and how they may break the symmetries; and finally determine whether the remnant symmetries are compatible with the experimental data. Here we address all these issues in the context of flavour models with any number of Higgs doublets. We stress the importance of analysing the Higgs vacuum expectation values that are pseudo-invariant under the generators of all subgroups. It is shown that the only way of obtaining a physical CKM mixing matrix and, simultaneously, non-degenerate and non-zero quark masses is requiring the vacuum expectation values of the Higgs fields to break completely the full flavour group, except possibly for some symmetry belonging to baryon number. The application of this technique to some illustrative examples, such as the flavour groups Delta (27), A(4) and S-3, is also presented.
Peer review: yes
URI: http://hdl.handle.net/10400.21/4973
DOI: 10.1140/epjc/s10052-014-2953-9
ISSN: 1434-6044
Aparece nas colecções:ISEL - Física - Artigos

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