New A4 lepton flavor model from S4 modular symmetry
被引:0
作者:
Tatsuo Kobayashi
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h-index: 0
机构:Hokkaido University,Department of Physics
Tatsuo Kobayashi
Yusuke Shimizu
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h-index: 0
机构:Hokkaido University,Department of Physics
Yusuke Shimizu
Kenta Takagi
论文数: 0引用数: 0
h-index: 0
机构:Hokkaido University,Department of Physics
Kenta Takagi
Morimitsu Tanimoto
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h-index: 0
机构:Hokkaido University,Department of Physics
Morimitsu Tanimoto
论文数: 引用数:
h-index:
机构:
Takuya H. Tatsuishi
机构:
[1] Hokkaido University,Department of Physics
[2] Hiroshima University,Graduate School of Science
[3] Niigata University,Department of Physics
来源:
Journal of High Energy Physics
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2020卷
关键词:
Discrete Symmetries;
Neutrino Physics;
Compactification and String Models;
CP violation;
D O I:
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中图分类号:
学科分类号:
摘要:
We study a flavor model with A4 symmetry which originates from S4 modular group. In S4 symmetry, Z2 subgroup can be anomalous, and then S4 can be violated to A4. Starting with a S4 symmetric Lagrangian at the tree level, the Lagrangian at the quantum level has only A4 symmetry when Z2 in S4 is anomalous. We obtain modular forms of two singlets and a triplet representations of A4 by decomposing S4 modular forms into A4 representations. We propose a new A4 flavor model of leptons by using those A4 modular forms. We succeed in constructing a viable neutrino mass matrix through the Weinberg operator for both normal hierarchy (NH) and inverted hierarchy (IH) of neutrino masses. Our predictions of the CP violating Dirac phase δCP and the mixing sin2θ23 depend on the sum of neutrino masses for NH.