论文标题
大量MEV中微子背景中高能宇宙中微子的振荡
Oscillations of High-Energy Cosmic Neutrinos in the Copious MeV Neutrino Background
论文作者
论文摘要
大型恒星的核心爆发和中子恒星二进制的合并是生产高能量宇宙中微子的最有前途的候选场所之一。我们证明，在这种极端环境中产生的高能中微子可以在尺度上经历有效的风味转化，这比真空中预期的尺度短得多，这是由于它们的相干向前散射，并从中央发动机中散发出的腐烂的低能中微子。这些低能中微子以质量特征状态存在，为高能传播提供了一种非常特殊和特殊的主导背景。我们指出，高能中微子的风味比被修改为与中微子能量无关的值，这与具有物质效应的常规预测不同。我们还建议这些信号可以用作超出标准模型以外的新中微子相互作用的新型探针。这是另一个背景中微子中微子 - 中微子相互作用可以在其风味演化中发挥至关重要的作用。
The core-collapse of massive stars and merger of neutron star binaries are among the most promising candidate sites for the production of high-energy cosmic neutrinos. We demonstrate that the high-energy neutrinos produced in such extreme environments can experience efficient flavor conversions on scales much shorter than those expected in vacuum, due to their coherent forward scatterings with the bath of decohered low-energy neutrinos emitted from the central engine. These low-energy neutrinos, which exist as mass eigenstates, provide a very special and peculiar dominant background for the propagation of the high-energy ones. We point out that the high-energy neutrino flavor ratio is modified to a value independent of neutrinos energies, which is distinct from the conventional prediction with the matter effect. We also suggest that the signals can be used as a novel probe of new neutrino interactions beyond the Standard Model. This is yet another context where neutrino-neutrino interactions can play a crucial role in their flavor evolution.
