Abstract
A dynamical origin of the Yukawa couplings is a promising scenario to explain the flavour puzzle. The focus of this letter is set on the role of the neutrino Majorana character: when an O(2)N flavour symmetry acts on the right-handed neutrino sector, the minimum of the scalar potential allows for large mixing angles -in contrast to the simplest quark case- and predicts a maximal Majorana phase. This leads to a strong correlation between neutrino mass hierarchy and mixing pattern. Realistic solutions point to the existence of three heavy right-handed neutrinos.
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Alonso, R., Gavela, M.B., Hernández, D. et al. Leptonic dynamical Yukawa couplings. J. High Energ. Phys. 2013, 69 (2013). https://doi.org/10.1007/JHEP08(2013)069
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DOI: https://doi.org/10.1007/JHEP08(2013)069