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arXiv 1311.2188hep-ph
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部分$μ-τ$结构与轻子成因

Partial $μ-τ$ Textures and Leptogenesis

Cherif Hamzaoui, Salah Nasri, Manuel Toharia

摘要:

受大亚湾、雷诺和双赫兹合作组最近的研究结果的启发,我们研究了中微子扇区中精确$μ-τ$对称性的微小偏离的后果,以适应轻子混合矩阵中元素$V_{e3}$的非零值。在跷跷板框架内,我们确定了简单的模式狄拉克质量矩阵,导致近似$μ-τ$对称中微子质量矩阵,这是一致的中微子振荡数据,并导致非零混合角$V_{e3}$以及CP违反阶段的精确预测。我们还表明,中微子混合角和跷跷板参数之间有一个透明的联系,我们进一步探讨的背景下leptogenesis以及双β衰变现象。

英文摘要:

Motivated by the recent results from Daya Bay, Reno and Double Chooz Collaborations, we study the consequences of small departures from exact $μ-τ$ symmetry in the neutrino sector, to accommodate a non-vanishing value of the element $V_{e3}$ from the leptonic mixing matrix. Within the see-saw framework, we identify simple patterns of Dirac mass matrices that lead to approximate $μ-τ$ symmetric neutrino mass matrices, which are consistent with the neutrino oscillation data and lead to non-vanishing mixing angle $V_{e3}$ as well as precise predictions for the CP violating phases. We also show that there is a transparent link between neutrino mixing angles and see-saw parameters, which we further explore within the context of leptogenesis as well as double beta decay phenomenology.

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