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Search for CP Violation at a Neutrino Factory in a Four-Neutrino Model
Anna Kalliomäki, Jukka Maalampi, Morimitsu Tanimoto
The CP violation effects in long baseline neutrino oscillations are studied in the framework of a four-neutrino model (three active neutrinos and one sterile neutrino). It is assum…
Neutrino Masses and Mixings with Flavor Symmetries
Morimitsu Tanimoto
Recent atmospheric neutrino data at Super-Kamiokande suggest the large flavor mixing of neutrinos. Models for the lepton mass matrix, which give the near-maximal flavor mixing, are…
Search for CP Violation with a Neutrino Factory
Morimitsu Tanimoto
We have discussed the search of the genuine CP violation in a neutrino factory, in which well known neutrino beams are provided by a high intensity muon storage ring. Both $ΔP(\n_\…
Democratic Mass Matrices from Broken Flavor Symmetry
M. Tanimoto, T. Watari, T. Yanagida
We impose flavor symmetry in the supersymmetric standard model. Three lepton doublets transform as an triplet and three charged leptons $\ba…
Generation of Neutrino Masses and Mixings in Gauge Theories
M. Tanimoto
I review models which present large flavor mixings of the lepton sector based on the gauge theory.
Prediction of the CP violation in the Phenomenological Quark-Lepton Mass Matrix Approach
M. Fukugita, M. Tanimoto, T. Yanagida
We explore the phenomenological quark-lepton mass matrices, which are devised following the S flavour symmetry principle, yet fully consistent with SU(5) gauge models with the…
Zee Mass Matrix and Bi-Maximal Neutrino Mixing
C. Jarlskog, M. Matsuda, S. Skadhauge +1
We investigate neutrino masses and mixings within the framework of the Zee mass matrix, with three lepton flavors. It is shown that the bi-maximal solution is the only possibility…
Quark-Lepton Mass Matrices with Flavor Symmetry
Morimitsu Tanimoto
The U(1) flavor symmetry explains the large mixing of neutrinos while it leads to the unique texture for the quark mass matrices. It is remarked that U(1) symmetric mass matrices h…