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arXiv 1302.6499hep-ph
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中微子混合的本征矢量方法

An eigenvector based approach to neutrino mixing

D. Aristizabal Sierra, I. de Medeiros Varzielas, E. Houet

摘要:

我们提出了一个独立于模型的中微子质量矩阵的分析,通过扩展定义的轻子混合矩阵,我们可以参数化的tribimmaximum混合本征向量的小扰动的本征向量。这种方法被证明是强大的和方便的轻子混合的某些方面,特别是当研究的质量矩阵元素的灵敏度偏离其tribimportament形式。根据本征向量分解,中微子质量矩阵可以被理解为源自一个由数据确定的具有小偏差的tribimaxial主导结构。通过实施这种方法的情况下,中微子质量来自不同的机制,我们表明,实验观察到的结构非常自然地出现。因此,我们认为,观察到的偏离摩擦极大混合模式可能被解释为中微子质量矩阵的“混合”性质的可能暗示。

英文摘要:

We propose a model-independent analysis of the neutrino mass matrix through an expansion in terms of the eigenvectors defining the lepton mixing matrix, which we show can be parametrized as small perturbations of the tribimaximal mixing eigenvectors. This approach proves to be powerful and convenient for some aspects of lepton mixing, in particular when studying the sensitivity of the mass matrix elements to departures from their tribimaximal form. In terms of the eigenvector decomposition, the neutrino mass matrix can be understood as originating from a tribimaximal dominant structure with small departures determined by data. By implementing this approach to cases when the neutrino masses originate from different mechanisms, we show that the experimentally observed structure arises very naturally. We thus claim that the observed deviations from the tribimaximal mixing pattern might be interpreted as a possible hint of a ``hybrid'' nature of the neutrino mass matrix.

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