Neutrino masses and mixing from S4 flavor twisting
Neutrino masses and mixing from S4 flavor twisting
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DOI：
10.1103/physrevd.83.033004
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发表时间：
2010-10
影响因子：
5
通讯作者：
H. Ishimori;Yusuke Shimizu;M. Tanimoto;Atsushi Watanabe
中科院分区：
文献类型：
--
作者：
H. Ishimori;Yusuke Shimizu;M. Tanimoto;Atsushi Watanabe
本文讨论了一个基于S4离散对称的中微子质量模型，其中对称破缺是由第五维空间中右手中微子的边界条件触发的。三代左手轻子二重态和右手中微子被指定为S4的三重态。轻子混合角的大小，特别是反应堆角的大小与中微子质量模式有关，该模型将在未来的中微子实验中得到检验，例如，反应堆角度的早期发现有利于正常层次。对于倒置体系，轻子混合几乎是三重极大混合。额外维度的大小与可能的质量谱有关;小（大）体积对应于正常（倒置）质量等级。
We discuss a neutrino mass model based on the S4 discrete symmetry where the symmetry breaking is triggered by the boundary conditions of the bulk right-handed neutrino in the fifth spacial dimension. The three generations of the left-handed lepton doublets and the right-handed neutrinos are assigned to be the triplets of S4. The magnitudes of the lepton mixing angles, especially the reactor angle is related to the neutrino mass patterns and the model will be tested in future neutrino experiments, e.g., an early discovery of the reactor angle favors the normal hierarchy. For the inverted hierarchy, the lepton mixing is predicted to be almost the tribimaximal mixing. The size of the extra dimension has a connection to the possible mass spectrum; a small (large) volume corresponds to the normal (inverted) mass hierarchy.