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arXiv 0712.0774hep-ph
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最小跷跷板框架下的四零中微子Yukawa织构

Four Zero Neutrino Yukawa Textures in the Minimal Seesaw Framework

Gustavo C. Branco, David Emmanuel-Costa, M. N. Rebelo, Probir Roy

摘要:

在I型跷跷板框架下,我们研究了产生中微子狄拉克质量矩阵$m_D$的汤川耦合中零织构的物理意义。结果表明,四是与所观察到的轻子混合和假设,没有中微子质量消失的最大数量的纹理零兼容。我们将所有允许的$m_D$四零纹理分为两类,每类三个类。我们表明,不同的类,在一般情况下,承认CP破坏在低能量和高能量。我们进一步提出了在每种情况下的低能物理得到的约束。本文详细分析了这些零纹理在建立细成因和低能数据之间联系方面的作用。它表明,它是可能的,在所有情况下,完全指定的轻中微子质量和轻子混合与未知的重中微子质量的leptogenesis相关的参数。

英文摘要:

We investigate, within the Type I seesaw framework, the physical implications of zero textures in the Yukawa couplings which generate the neutrino Dirac mass matrix $m_D$. It is shown that four is the maximal number of texture zeroes compatible with the observed leptonic mixing and the assumption that no neutrino mass vanishes. We classify all allowed four-zero textures of $m_D$ into two categories with three classes each. We show that the different classes, in general, admit CP violation both at low and high energies. We further present the constraints obtained for low energy physics in each case. The r\^ ole of these zero textures in establishing a connection between leptogenesis and low energy data is analysed in detail. It is shown that it is possible in all cases to completely specify the parameters relevant for leptogenesis in terms of light neutrino masses and leptonic mixing together with the unknown heavy neutrino masses.

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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