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arXiv 0812.2704hep-ph
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具有$A_4$对称性的三重态Higgs模型中的中微子质量矩阵

Neutrino mass matrix in triplet Higgs models with $A_4$ symmetry

Myoung Chu Oh, Seungwon Baek

摘要:

我们考虑具有$A_4$对称性的三重态Higgs模型来产生中微子质量矩阵。中微子混合矩阵的三重极大形式可以自然地得到。利用中微子振荡数据,我们证明了:1)正常和倒置的质量等级都是允许的; 2)最轻的中微子质量和无中微子双β衰变的有效质量存在一个下限; 3)非零的$þ_{13}$可以通过考虑小扰动来调节; 4)即使在微扰之后,$þ_{\rm atm}$也应该非常接近于$π/4$. }

英文摘要:

We consider triplet Higgs model with $A_4$ symmetry to generate the neutrino mass matrix. The tribimaximal form of the neutrino mixing matrix can be naturally obtained. Imposing the neutrino oscillation data, we show that 1) both normal and inverted mass hierarchy are allowed, 2) there is a lower bound on the lightest neutrino mass and the effective mass for neutrinoless double beta decay, 3) the non-vanishing $þ_{13}$ can be accommodated by considering small perturbation, 4) $þ_{\rm atm}$ should be very close to $π/4$ even after perturbation. }

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