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arXiv 1005.0708hep-ph
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A4 x SU中可测中微子质量标度(5)

Measurable Neutrino Mass Scale in A4 x SU(5)

Stefan Antusch, Stephen F. King, Martin Spinrath

摘要:

我们提出了一个准简并中微子的超对称A4 × SU(5)模型,它预言了与无中微子双β衰变有关的有效中微子质量mee与中微子质量标度成正比,从而使其确定与未知的Majorana相近似无关.这种自然的准简并是通过使用A4(作为实三重态表示的非阿贝尔族对称的一个例子)来实现的,以强制中微子质量矩阵与单位元成比例的II型跷跷板贡献。三双峰中微子混合产生于通过A4族对称性和受约束的顺序优势的I型跷跷板贡献。我们进行了一个数值拟合的夸克和轻子的质量和夸克混合的一个简单的描述夸克CP破坏与α约90度也导致轻子相预测delta_MNS约90度。

英文摘要:

We propose a supersymmetric A4 x SU(5) model of quasi-degenerate neutrinos which predicts the effective neutrino mass m_ee relevant for neutrinoless double beta decay to be proportional to the neutrino mass scale, thereby allowing its determination approximately independently of unknown Majorana phases. Such a natural quasi-degeneracy is achieved by using the A4 (as an example of a non-Abelian family symmetry with real triplet representations) to enforce a type II seesaw contribution to the neutrino mass matrix proportional to the identity. Tri-bimaximal neutrino mixing arises from a type I seesaw contribution via A4 family symmetry and constrained sequential dominance. We perform a numerical fit to the quark and lepton masses and quark mixing where a simple ansatz describing quark CP violation with alpha approximately 90 degrees also leads to the leptonic phase prediction delta_MNS approximately 90 degrees.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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