论文标题
超新星的旋转培养物进动相效应
Spin-Flavor Precession Phase Effects in Supernova
论文作者
论文摘要
我们研究了核心塌陷超新星中的主要中微子中微子驱动的相位效应。具有较大磁矩的中微子在中子层的能量本征层中排放。这些能量本征可以干扰以部分绝热的自旋风味进动（SFP）共振产生相位效应。我们检查了SFP相位对中微子磁矩尺寸的依赖性以及随后弹跳时间的变化。特别是，在弹跳后期，SFP共振变得更宽，并最终与Mikheev-Smirnov-Wolfenstein（MSW）共鸣重叠。在这一点上，绝热性的Landau-Zener标准不再适用于单个共振，但我们表明SFP相位效应在重叠后仍然存在。我们还讨论了SFP阶段效应在弹跳后期的可观察性，在这种情况下更有可能产生影响。我们对深地下中微子实验（Dune）的分析表明，尽管存在相当大的SFP相效应，但在低能量下，事件的发生率并没有波动。我们发现在高能量处的事件速率波动较大，但是这些波动也在观察到的带电瘦素的能量光谱中删除。对电子级分的更精致的处理以及中微子中微子的相互作用的包含可能会改变我们在未来研究中的可观察性的结论。
We study the phase effects driven by neutrino magnetic moment for Majorana neutrinos in a core collapse supernova. A neutrino with a large magnetic moment is emitted in a superposition of energy eigenstates from the neutrinosphere. These energy eigenstates can interfere to create a phase effect at a partially adiabatic spin flavor precession (SFP) resonance. We examine the dependence of the SFP phase effect on the size of the neutrino magnetic moment as well as its variation with the post bounce time. In particular, at late post-bounce times the SFP resonance becomes wider and eventually overlaps with the Mikheev-Smirnov-Wolfenstein (MSW) resonance. At this point, Landau-Zener criteria for adiabaticity can no longer be applied to individual resonances, but we show that SFP phase effect is still present after the overlap. We also discuss the observability of the SFP phase effect at late post bounce times where it is more likely to make an impact. Our analysis for the Deep Underground Neutrino Experiment (DUNE) reveals that at low energies event rates do not fluctuate despite the presence of a sizable SFP phase effect. We find larger event rate fluctuations at high energies, but these fluctuations are also erased in the energy spectra of the observed charged leptons. A more refined treatment of electron fraction and the inclusion of neutrino-neutrino interactions may change our conclusions for observability in future studies.
