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arXiv 0908.0470hep-ph
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轻子味谱的辐射透射

Radiative Transmission of Lepton Flavor Hierarchies

Adisorn Adulpravitchai, Manfred Lindner, Alexander Merle, Rabindra N. Mohapatra

摘要:

我们讨论了一个中微子质量的单圈模型,它导致了一个类似跷跷板的公式,不同的是,带电轻子质量取代未知的狄拉克质量矩阵存在于通常的跷跷板的情况下。这是一个相当大的减少中微子部门的参数,并预测一个强大的层次模式,右手中微子质量矩阵,很容易从一个$U(1)_H$家庭的对称性。该模型是基于左,右规范群与额外的$Z_4$离散对称性,使消失的中微子狄拉克质量和有限的马约拉纳质量产生在一个循环的水平。此外,它是少数几个自然允许轻子扇区中大(但不一定是最大)混合角的模型之一。将模型推广到夸克扇区需要三个同自旋单态矢量类下型夸克,如$E_6$。该模型预测了一个惰性的双重类型的标量暗物质。

英文摘要:

We discuss a one loop model for neutrino masses which leads to a seesaw-like formula with the difference that the charged lepton masses replace the unknown Dirac mass matrix present in the usual seesaw case. This is a considerable reduction of parameters in the neutrino sector and predicts a strong hierarchical pattern in the right handed neutrino mass matrix that is easily derived from a $U(1)_H$ family symmetry. The model is based on the left-right gauge group with an additional $Z_4$ discrete symmetry which gives vanishing neutrino Dirac masses and finite Majorana masses arising at the one loop level. Furthermore, it is one of the few models that naturally allow for large (but not necessarily maximal) mixing angles in the lepton sector. A generalization of the model to the quark sector requires three iso-spin singlet vector-like down type quarks, as in $E_6$. The model predicts an inert doublet type scalar dark matter.

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