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arXiv 1302.2372hep-phhep-ex
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中微子Yukawa矩阵中具有四个织构零点的跷跷板机制

Seesaw mechanism with four texture zeros in the neutrino Yukawa matrix

Jiajun Liao, D. Marfatia, K. Whisnant

摘要:

随着最近对非零θ_{13}的观测,我们已经知道了五个中微子振荡参数。通过在I型跷跷板模型的Yukawa耦合矩阵中引入四个零点,中微子质量矩阵中的参数数目减少到七个,我们能够对最轻的中微子质量、Dirac CP相位和无中微子双β衰变作出预言.对于轻中微子质量矩阵的非对角元,汤川耦合矩阵中的四个织构零等价于单个织构零或单个余因子零。我们发现一个质量排序和单辅因子零模型与相反的质量排序的单一纹理零模型之间有很强的相似性。在一个特定的类的单味leptogenesis模型的上下文中,我们发现参数空间上的附加约束。

英文摘要:

With the recent observation of nonzero θ_{13}, five neutrino oscillation parameters are now known. By imposing four zeros in the Yukawa coupling matrix of the type I seesaw model, the number of parameters in the neutrino mass matrix is reduced to seven, and we are able to make predictions for the lightest neutrino mass, Dirac CP phase, and neutrinoless double beta decay. Four texture zeros in the Yukawa coupling matrix is equivalent to either a single texture zero or a single cofactor zero for an off-diagonal element of the light neutrino mass matrix. We find strong similarities between single texture zero models with one mass ordering and single cofactor zero models with the opposite mass ordering. In the context of a specific class of single-flavor leptogenesis models, we find additional constraints on the parameter space.

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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