We suggest a neutrino mass matrix texture satisfying the μ−τ reflection symmetry in a B−L model with T7 symmetry by introducing additional singlet scalars and invoking the Type-I seesaw mechanism in which the hierarchical patterns of charged lepton and neutrino masses and of lepton mixing are addressed. The Dirac and Majorana mass matrices hint for a realistic lepton mixing pattern in which the μ−τ symmetry is broken by the contribution from the charged lepton sector. Explicit relations between the Yukawa-like couplings and the observed neutrino oscillation parameters are established. The Yukawa-like couplings in the charged-lepton sector are expressed in terms of three charged lepton masses whereas the Yukawa-like couplings in the neutrino sector are expressed in terms of three observed neutrino mixing angles, two neutrino mass-squared splittings and the lightest neutrino mass, whose magnitudes are in the same order. The considered model is satisfied for both normal and inverted neutrino mass hierarchies and for both lower and higher octants in the light of the recent experimental data.

中文翻译：

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T7 × Z8 × Z2 对称性的 B − L 模型中的 μ − τ 反射对称性断裂


我们建议在具有 T7 对称性的 B-L 模型中满足 μ−τ 反射对称性的中微子质量矩阵纹理，方法是引入额外的单线标量并调用 I 型跷跷板机制，其中解决了带电轻子和中微子质量以及轻子混合的分层模式。Dirac 和 Majorana 质量矩阵暗示了一种真实的轻子混合模式，其中 μ−τ 对称性被带电轻子扇区的贡献打破。建立了 Yukawa 样耦合与观察到的中微子振荡参数之间的显式关系。带电轻子区中的类汤川耦合用三个带电轻子质量表示，而中微子区中的类汤川耦合用三个观察到的中微子混合角、两个中微子质量平方分裂和最轻的中微子质量表示，其大小相同。根据最近的实验数据，所考虑的模型对于正常和倒置的中微子质量层次结构以及较低和较高的八分位数都得到满足。