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arXiv · 1908.09384

Natural neutrino sector in a 331-model with Froggatt-Nielsen mechanism

Katri Huitu·Niko Koivunen·Timo J. Kärkkäinen
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Abstract

The extensions of the Standard Model based on the $SU(3)_c\times SU(3)_L\times U(1)_X$ gauge group (331-models) have been advocated to explain the number of fermion families in nature. It has been recently shown that the Froggatt-Nielsen mechanism, a popular way to explain the mass hierarchy of the charged fermions, can be incorporated into the 331-setting in an economical fashion (FN331). In this work we extend the FN331-model to include three right-handed neutrino singlets. We show that the seesaw mechanism is realized in this model. The scale of the seesaw mechanism is near the $SU(3)_L\times U(1)_X$-breaking scale. The model we present here simultaneously explains the mass hierarchy of all the fermions, including neutrinos, and the number of families.

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Katri Huitu, Niko Koivunen, Timo J. Kärkkäinen. 2019-08-25. Natural neutrino sector in a 331-model with Froggatt-Nielsen mechanism. https://doi.org/10.1007/jhep02(2020)162

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