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Quaternion Family Symmetry of Quarks and Leptons
Michele Frigerio, Satoru Kaneko, Ernest Ma +1
To a first approximation, the quark mixing matrix has , whereas the lepton mixing matrix has . We show how this structure may be understood…
Non-vanishing and from a broken symmetry
Walter Grimus, Anjan S. Joshipura, Satoru Kaneko +3
It is shown that the neutrino mass matrices in the flavour basis yielding a vanishing are characterized by invariance under a class of symmetries. A specific i…
Lepton mixing angle with a horizontal symmetry
W. Grimus, A. S. Joshipura, S. Kaneko +2
We discuss a model for the lepton sector based on the seesaw mechanism and on a family symmetry. The model predicts the mixing angle to vanish. The solar mixing angl…
Symmetry realization of texture zeros
W. Grimus, A. S. Joshipura, L. Lavoura +1
We show that it is possible to enforce texture zeros in arbitrary entries of the fermion mass matrices by means of Abelian symmetries; in this way, many popular mass-matrix texture…
Seesaw Enhancement of Bi-large Mixing in Two-Zero Textures
Mizue Honda, Satoru Kaneko, Morimitsu Tanimoto
The seesaw enhancement of the bi-large mixings are discussed for the two-zero textures of the neutrino mass matrix. There are no large mixings in both Dirac neutrino mass matrix $m…