中微子质量和混合的最小修正$A_4$ Altarelli-Feruglio模型及其实验结果
Minimally modified $A_4$ Altarelli-Feruglio model for neutrino masses and mixings and its experimental consequences
摘要：
我们提出了一个简单的修改Altarelli-Feruglio $A_4$味对称性模型，使用最少数量的参数一致的对称性的原始理论。由此产生的模型与目前已知的所有中微子质量和混合数据是一致的。此外，它为未来旨在改进$\sin^2θ_{12}$、$\sin^2θ_{13}$、$δ_{\rm CP}$和无中微子双β衰变参数$|m_{ee}|$测量的实验做出了可检验的严密预测。我们的模型利用了独特的可能性，多个允许的，但质量不同，收缩的领域下的$A_4$离散对称性。
英文摘要：
We present a simple modification of the Altarelli-Feruglio $A_4$ flavor symmetry model using a minimal number of parameters congruous with the symmetries of the original theory. The resulting model is consistent with all presently known data on neutrino masses and mixings. Furthermore, it makes testable tight predictions for future experiments aimed at improving the measurements of $\sin^2θ_{12}$, $\sin^2θ_{13}$, $δ_{\rm CP}$ and the neutrinoless double-beta decay parameter $|m_{ee}|$. Our model exploits the unique possibility of multiple allowed, yet qualitatively different, contractions of fields charged under the $A_4$ discrete symmetry.
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