论文标题
从银河系核心折叠超新星限制伪迪拉克中微子
Constraining pseudo-Dirac neutrinos from a galactic core-collapse supernova
论文作者
论文摘要
中微子本质上可以是伪迪拉克 - 主要目的是dirac fermions。在这种情况下，主动和无菌中微子的质量是准脱位，因此两者之间的振荡，由于其微小的质量方差$（δm^2）$，只能在很长的基线上发展。在这一假设下，我们分析了SN1987A的中微子数据，并发现对非零质量方差异的温和偏好。相同的数据也可以用来排除$δm^2 \ sim 10^{ - 20} {\ rm ev}^2 $的值 - 到目前为止受到最小的约束。我们还讨论了诸如沙丘和Hyper-Kamiokande之类的下一代实验如何探究这种情况，以获取未来的银河系超新星。
Neutrinos can be pseudo-Dirac in nature -- Majorana fermions behaving as Dirac fermions for all practical purposes. In such a scenario, active and sterile neutrinos are quasi-degenerate in mass, and hence oscillations between the two, due to their tiny mass-squared difference $(δm^2)$, can develop only over very long baselines. Under this hypothesis, we analyze the neutrino data from SN1987A, and find a mild preference for a non-zero mass-squared difference. The same data can also be used to exclude values of $δm^2\sim 10^{-20}{\rm eV}^2$ - the smallest constrained so far. We also discuss how next-generation experiments like the DUNE and Hyper-Kamiokande can probe this scenario for a future galactic supernova.
