We show the possibility to discover the neutrino nature by measuring the Majorana CP phase at the DUNE experiment. This phase is turned on by a decoherence environment, possibly originated by physics at the Planck scale. A sizable distortion in the measurement of the Dirac CP violation phase $δ_{\mathrm{CP}}$ is observed at DUNE when compared with T2HK measurement due to decoherence and non-null Majorana phase. Being that, when the measurement of the Majorana phase is performed at DUNE, it reaches a precision of 23 (21) $\%$ for a decoherence parameter $Γ=4.5(5.5)\times 10^{-24} \mathrm{GeV}$ and a Majorana phase equal to $1.5 π$. The latter precision is similar to the one obtained at the T2K experiment at its current Dirac CP violation phase measurement.
On the CP Violation Associated with Majorana Neutrinos and Neutrinoless Double-Beta Decay
在假设3-中微子混合和大质量Majorana中微子的情况下,我们分析了通过测量有效Majorana质量来确定轻子扇区i)中存在与Majorana中微子相关的CP破坏的可能性|<m>| in neutrinoless double beta-decay with a sufficient precision and ii) by measuring of, or obtaining a stringent upper limit on, the lightest neutrino mass m1.关于m1的信息可以从KATRIN的氚β衰变实验以及天体物理学和宇宙学观测中获得。证明所指示的CP违反发生特别需要测量值的相对实验误差,|<m>|这是由于对相应的核矩阵元的不精确的了解小于2倍,tan ^2 θ_(solar)的值大于0.55,以及相关的马约拉纳CP破坏相的值通常在(Pi/2 - 3 Pi/4)和(5 Pi/4 - 3 Pi/2)的区间内。|<m>| due to an imprecise knowledge of the corresponding nuclear matrix elements smaller than a factor of 2, a value of tan^2 theta_(solar) larger than 0.55, and values of …
Majorana Neutrinos, CP-Violation, Neutrinoless Double-Beta and Tritium-Beta Decays
如果目前或即将进行的对无中微子双β衰变的研究得到肯定的结果,那么大质量中微子的马约拉纳性质将被确立。从有效马约拉纳质量参数值的确定|<m>|, it would be possible to obtain information on the type of neutrino mass spectrum.假设3-中微子混合和大量的马约拉纳中微子,我们讨论的信息的测量,或上界,|<m>| can provide on the value of the lightest neutrino mass m1.有了在氚β衰变实验中获得的中微子质量的额外数据,就有可能确定在轻子扇区中CP对称性是否被破坏。这将需要非常高精度的测量。如果CP-不变性成立,那么大质量Majorana中微子的相对CP-宇称的允许模式将被确定。
Extracting Majorana Properties in the Throat of Neutrinoless Double Beta Decay
假设中微子是马约拉纳粒子,我们探索什么信息可以推断出未来的强限制(即非观测)的无中微子双β衰变。具体来说,我们考虑的情况下,质量层次是正常的和不同的贡献,有效质量$\langle m \rangle_{ee}$部分取消。我们讨论了如何固定两个马约拉纳CP阶段同时从马约拉纳三角形和它如何限制最轻的中微子质量$m_1$在一个狭窄的窗口。在这种情况下,对于较大的$\langle m \rangle_{ee}$,两个马约拉纳CP相位甚至比通常情况下更好地确定。我们表明,在这些预测的不确定性可以显着减少反应堆中微子实验的补充测量,特别是中等基线版本JUNO/RENO-50。我们还估计了在$\langle m \rangle_{ee}$上推断非平凡Majorana CP相位所需的精度,并且上限$\langle m \rangle_{ee} \lesssim 1\,\mbox{meV}$为未来无中微子双β衰变实验的设计设定了一个目标。
Modular TM$_1$ mixing in light of precision measurement in JUNO
School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS(杭州高等研究院基础物理与数学学院,UCAS);Institute of Theoretical Physics, Chinese Academy of Sciences(中国科学院理论物理研究所);University of Chinese Academy of Sciences(中国科学院大学)