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arXiv 1202.4024hep-ph
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轻子质量矩阵的织构零模型

Texture-zero model for the lepton mass matrices

P. M. Ferreira, L. Lavoura

摘要:

我们提出了一个简单的模型,I型跷跷板机制的基础上,轻子质量矩阵。该模型的铰链上的阿贝尔对称性,导致质量矩阵与一些消失的矩阵元素。该模型预测了一个无质量中微子和$M_{eμ} = 0$($M$是有效的轻中微子马约拉纳质量矩阵)。我们表明,这些预测完全符合目前的实验数据,如果中微子质谱是倒置的,即如果$m_3 = 0$,提供狄拉克相$δ$是非常接近最大值($\pm π/ 2$)。在正常中微子质谱的情况下,即当$m_1 = 0$时,我们的模型与数据的一致性不是最佳的-反应堆混合角$θ_{13}$在我们的模型中太小。最小leptogenesis是不是在我们的模型中的一个选项,由于汤川耦合矩阵中的消失元素。

英文摘要:

We suggest a simple model, based on the type-I seesaw mechanism, for the lepton mass matrices. The model hinges on an Abelian symmetry which leads to mass matrices with some vanishing matrix elements. The model predicts one massless neutrino and $M_{eμ} = 0$ ($M$ is the effective light-neutrino Majorana mass matrix). We show that these predictions perfectly agree with the present experimental data if the neutrino mass spectrum is inverted, i.e. if $m_3 = 0$, provided the Dirac phase $δ$ is very close to maximal ($\pm π/ 2$). In the case of a normal neutrino mass spectrum, i.e. when $m_1 = 0$, the agreement of our model with the data is less than optimal---the reactor mixing angle $θ_{13}$ is too small in our model. Minimal leptogenesis is not an option in our model due to the vanishing elements in the Yukawa-coupling matrices.

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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