TY  - JOUR
AU  - Gonzalez Felipe, R.
AU  - Ivanov, I. P.
AU  - Nishi, C. C.
AU  - Serodio, H.
AU  - Silva, J. P.
PY  - 2014
DA  - 2014//
TI  - Constraining multi-Higgs flavour models
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 2953 - 12pp
VL  - 74
IS  - 7
PB  - Springer
AB  - 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.
SN  - 1434-6044
UR  - http://arxiv.org/abs/1401.5807
UR  - https://doi.org/10.1140/epjc/s10052-014-2953-9
DO  - 10.1140/epjc/s10052-014-2953-9
LA  - English
N1  - WOS:000350743900002
ID  - GonzalezFelipe_etal2014
ER  -