412 research outputs found
Predictions for the neutrino parameters in the minimal gauged U(1) model
We study the structure of the neutrino mass matrix in the minimal gauged
U(1) model, where three right-handed neutrinos are added to
the Standard Model in order to obtain non-zero masses for active neutrinos.
Because of the U(1) gauge symmetry, the structure of both
Dirac and Majorana mass terms of neutrinos is tightly restricted. In
particular, the inverse of the neutrino mass matrix has zeros in the
and components, namely, this model offers a symmetric
realization of the so-called two-zero-minor structure in the neutrino mass
matrix. Due to these constraints, all the CP phases-the Dirac CP phase
and the Majorana CP phases and -as well as the mass
eigenvalues of the light neutrinos are uniquely determined as functions
of the neutrino mixing angles , , and ,
and the squared mass differences and . We
find that this model predicts the Dirac CP phase to be - (-), the sum of the neutrino masses to be
-0.22 eV (-0.40 eV), and the effective mass for
the neutrinoless double beta decay to be -0.055 eV (-0.12 eV) at () level, which
are totally consistent with the current experimental limits. These predictions
can soon be tested in future neutrino experiments. Implications for
leptogenesis are also discussed.Comment: v1: 23 pages, 6 figures. v2: 24 pages, 8 figures, Discussion on
leptogenesis adde
アルミニウム間二重結合化学種の合成研究とその反応性の解明
京都大学0048新制・課程博士博士(理学)甲第19523号理博第4183号新制||理||1601(附属図書館)32559京都大学大学院理学研究科化学専攻(主査)教授 時任 宣博, 教授 丸岡 啓二, 教授 大須賀 篤弘学位規則第4条第1項該当Doctor of ScienceKyoto UniversityDGA
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