Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-10-16
Phys.Lett.B659:628-633,2008
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, uses revtex4 and axodraw.sty
Scientific paper
10.1016/j.physletb.2007.11.083
We address two fundamental aspects of flavor physics: the mass hierarchy and the large lepton mixing angles. On one side, left-right flavor symmetry realizes the democratic mass matrix patterns and explains why one family is much heavier than the others. On the other side, discrete flavor symmetry such as A4 leads to the observed tribimaximal mixing for the leptons. We show that, by explicitly breaking the left-right flavor symmetry into the diagonal A4, it is possible to explain both the observed charged fermion mass hierarchies and quark and lepton mixing angles. In particular we predict a heavy 3rd family, the tribimaximal mixing for the leptons, and we suggest a possible origin of the Cabibbo and other mixing angles for the quarks.
Bazzocchi Federica
Morisi Stefano
Picariello Marco
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