Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-09-21
Phys.Rev.D78:116018,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, revtex
Scientific paper
10.1103/PhysRevD.78.116018
We study the flavour sector in models where the three families of matter are unified in a $(16,3)$ representation of the $SO(10)\times A_4$ group. The necessary ingredients to realize tri-bi-maximal mixing in the lepton sector are identified systematically. The non-renormalizable operators contributing to the fermion mass matrices play an important role. We also present a mechanism to explain the inter-family mass hierarchy of quarks and charged leptons, which relies on a `universal seesaw' mechanism and is compatible with tri-bi-maximal mixing.
Bazzocchi Federica
Frigerio Michele
Morisi Stefano
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