Realizing Tri-bimaximal Mixing in Minimal Seesaw Model with S4 Family Symmetry

Realizing Tri-bimaximal Mixing in Minimal Seesaw Model with S4 Family Symmetry
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具有S4族对称性的最小跷跷板模型中实现三双极大混合

DOI:
10.1016/j.physletb.2011.06.050
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发表时间:
2011-06
期刊:
影响因子:
4.4
通讯作者:
Z.-h. Zhao
Z.-h. Zhao
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Z.-h. Zhao

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在这封信中,我们实现了在轻子扇区的三双峰混合的背景下,只有两个右手中微子被引入的最小跷跷板,与离散群S4作为家庭的对称性。为了限制超势的形式,还引入了Z3对称性。在该模型中,带电轻子和右手中微子的质量矩阵是对角矩阵。对角化轻Majorana中微子质量矩阵的酉矩阵在LO处是精确的三双峰,并且在NLO处被少量的O(0.01)校正。还提出了获得所使用的特定标量VEV对准的机制。唯象地,质谱是正常的等级,其中m 1 =0,∑ m和|mee|分别约为0.058 eV和0.003 eV。
In this Letter, we realize the tri-bimaximal mixing in the lepton sector in the context of minimal seesaw in which only two right-handed neutrinos are introduced, with the discrete group S4 as the family symmetry. In order to constrain the form of superpotential, a Z3 symmetry is also introduced. In the model, the mass matrices for charged leptons and right-handed neutrinos are diagonal. The unitary matrix that diagonalizes the light Majorana neutrino mass matrix is exact tri-bimaximal at LO, and is corrected by small quantities of O(0.01) at NLO. The mechanism to get the particular scalar VEV alignments used is also presented. Phenomenologically, the mass spectrum is of normal hierarchy with m1=0, and ∑miand |mee| are about 0.058 eV and 0.003 eV respectively.
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