论文标题
使用NGC 1068的高能中微子对伪DIRAC中微子的限制
Constraints on pseudo-Dirac neutrinos using high-energy neutrinos from NGC 1068
论文作者
论文摘要
中微子本质上可以是伪dirac-它们可以是主要的费米，同时有效地表现为Dirac Fermions。这种情况预测了由微小的质谱差$（δm^2）$驱动的主动性中微子振荡，这是软体动体数量违规的结果。由于微小的$δm^2 $引起的振荡只能在天体物理基准上发生，因此在陆地中微子振荡实验中无法访问。这意味着来自大距离的高能中微子可以自然地用于测试这种情况。我们使用IceCube协作的主要银河核NGC 1068对高能中微子的观察，排除该区域$ [1.4 \ times 10^{ - 18}，10^{ - 18}，10^{ - 17}] \，{\ rm ev}^2 $ lim的$ 90级\％\％的conterive的$Δm^2 $。 $Δm^2 $。我们还讨论了可能的不确定性，可以降低这些结果的敏感性。
Neutrinos can be pseudo-Dirac in Nature - they can be Majorana fermions while behaving effectively as Dirac fermions. Such scenarios predict active-sterile neutrino oscillations driven by a tiny mass-squared difference $(δm^2)$, which is an outcome of soft lepton number violation. Oscillations due to tiny $δm^2$ can only take place over astrophysical baselines and hence are not accessible in terrestrial neutrino oscillation experiments. This implies that high-energy neutrinos coming from large distances can be naturally used to test this scenario. We use the recent observation of high-energy neutrinos from the active galactic nuclei NGC 1068 by the IceCube collaboration to rule out $δm^2$ in the region $[1.4 \times 10^{-18}, 10^{-17}]\, {\rm eV}^2$ at more than $90\%$ confidence level - one of the strongest limits to date on the values of $δm^2$. We also discuss possible uncertainties which can reduce the sensitivity of these results.
