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27 April 2024 |
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An $S_3$ Model for Lepton Mass Matrices with Nearly Minimal Texture | | A. G. Dias
; A. C. B. Machado
; C. C. Nishi
; | | Date: |
27 Jun 2012 | | Abstract: | We propose a simple extension of the electroweak standard model based on the
discrete $S_3$ symmetry that is capable of realizing a nearly minimal
Fritzsch-type texture for both the Dirac mass matrices of charged leptons and
neutrinos. This is achieved with aid of two additional $Z_3$ symmetries, one of
which can be embedded in $U(1)_{B-L}$. Four complex scalar singlet fields are
introduced in addition to the SM with righthanded neutrinos. Although more
general, the modified texture of the model retains the successful features of
the minimal texture without fine-tuning, namely, it accommodates the masses and
mixing of the leptonic sector and relates the emergence of large leptonic
mixing angles with the seesaw mechanism. An analysis of deviations from the
minimal texture ansatz is also presented. | | Source: | arXiv, 1206.6362 | | Services: | Forum | Review | PDF | Favorites | |
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