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arXiv 1806.06229hep-ph
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中微子质量观测量与非厄米型I型跷跷板模型

Neutrino mass observables and non-Hermitian version of Type-I seesaw model

Sasmita Mishra

摘要:

研究了单重右手中微子对标准模型的拉格朗日量的非厄米延拓。由厄米和非厄米分量组成的Yukawa耦合矩阵和三代中微子质量本征值被计算。由于耦合矩阵的非厄米特性质,理论中未知参数的数量增加,给其生产力带来了问题。因此,我们应用四个零纹理的汤川矩阵。我们考虑了中微子质量序的正规族,通过对角化轻子质量矩阵得到了混合角和Dirac CP破坏相。混合矩阵的参数由非厄米汤川耦合矩阵的参数得到。的角度和相位的值是兼容的中微子质量观测的实验数据,并使用此非厄米参数的约束。此外,我们还研究了轻子扇区中的$CP$破坏和轻子生成对模型参数的约束。

英文摘要:

We study the non-Hermitian extension of the Lagrangian of the Standard Model extended by singlet right-handed heavy neutrinos. The Yukawa coupling matrices comprise of hermitian and non-hermitian components and the neutrino mass eigenvalues are calculated for three generation case. The increased number of unknown parameters in the theory due to non-hermitian nature of coupling matrices impose problem for its productiveness. Hence we apply four zero texture for the Yukawa matrices. We consider the normal hierarchy of neutrino mass ordering and find the mixing angles and Dirac CP violating phase by diagonalizing the lepton mass matrices. The parameters of the mixing matrix are obtained in terms of the parameters of the non-hermitian Yukawa coupling matrix. The values of the angles and phase are compatible with experimental data available for neutrino mass observables and using this the non-hermitian parameters are constrained. Also, we study the constraints imposed by $CP$ violation in the lepton sector and leptogenesis on the model parameters.

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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