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arXiv 2004.12391hep-phhep-ex
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RGE诱导的$μ$ - $τ$对称破缺:对最新T2K结果的分析

RGE-induced $μ$-$τ$ symmetry breaking: an analysis of the latest T2K results

Guo-yuan Huang, Newton Nath

摘要:

T2 K合作组最近报告了他们的结果,给出了正常中微子质量排序的大气混合角$\sin^2 θ_{23} = 0.53$和狄拉克CP破坏相$δ= -1.89$的最佳拟合值。基于$μ$ - $τ$反射对称性,我们给出了这种值的可能的理论起源。在最小超对称标准模型的框架下,利用单圈重整化群方程(RGE)对这种对称性的破缺与最新的T2 K结果和最近的整体拟合结果吻合较好.为了进行定量分析,我们首次将振荡、β衰变、无中微子双β衰变和宇宙学观测的完整数据集包括在内,以进行理论与实验的比较。我们还进一步研究了这种破缺模式对无中微子双β衰变实验的重要性。

英文摘要:

The T2K collaboration has recently reported their results, which gives the best-fit values of the atmospheric mixing angle $\sin^2 θ_{23} = 0.53$ and the Dirac CP-violating phase $δ= -1.89$ for normal neutrino mass ordering. We give a possible theoretical origin of such values based on the $μ$-$τ$ reflection symmetry. It has been found that the breaking of such symmetry using one-loop renormalization-group equations (RGEs) in the framework of minimal supersymmetric standard model can fit well with the latest T2K results and the recent global fits. To make a quantitative analysis, we have included for the first time the complete dataset of oscillation, beta decay, neutrinoless double-beta decay and cosmological observations in comparing the theory to experiments. We also further examine the importance of such breaking patterns for neutrinoless double-beta decay experiments.

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