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

• Main Authors: Katri Huitu, Niko Koivunen, Timo J. Kärkkäinen
• Format: Article
• Language: English
• Published: SpringerOpen 2020-02-01
• Series: Journal of High Energy Physics
• Subjects: Beyond Standard Model; Global Symmetries; Neutrino Physics; Spontaneous; Symmetry Breaking
• Online Access: http://link.springer.com/article/10.1007/JHEP02(2020)162

Abstract The extensions of the Standard Model based on the SU(3) c × SU(3) L × 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 × 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.