论文标题
时机和多通道：确定超新星中微子质量排序的新方法
Timing and Multi-Channel: Novel Method for Determining the Neutrino Mass Ordering from Supernovae
论文作者
论文摘要
标准三味中微子振荡范式中剩下的少数未知数之一是中微子质量的排序。在这项工作中，我们提出了一种新的方法，用于使用早期超新星中微子事件的时间信息确定中微子质量排序。在核心溢出的超新星中，中微子比抗肿瘤更早产生，具体取决于影响绝热风味演变的质量顺序，可能会在$ν_e$检测通道中引起早期可观察的信号。因此，时间差异对质量排序敏感。我们发现，使用有关Dune，Juno和Hyper-Kamiokande在未来探测器中检测第一个银河超新星事件的时间信息，可以在$ \ sim2σ$ Cl中确定批量订购，而$ \ Mathcal {o}（O}（O}（10）$事件足以进行发现。我们的方法不需要高统计数据，可以在超新星预警系统（SNEWS）中使用，该系统将可以访问许多检测器中记录的早期超新星中微子事件的时间信息。本文提出的方法还意味着质量顺序和定位超新星的三角测量方法之间存在至关重要的相互作用。
One of the few remaining unknowns in the standard three-flavor neutrino oscillation paradigm is the ordering of neutrino masses. In this work we propose a novel method for determining neutrino mass ordering using the time information on early supernova neutrino events. In a core-collapse supernova, neutrinos are produced earlier than antineutrinos and, depending on the mass ordering which affects the adiabatic flavor evolution, may cause earlier observable signals in $ν_e$ detection channels than in others. Hence, the time differences are sensitive to the mass ordering. We find that using the time information on the detection of the first galactic supernova events at future detectors like DUNE, JUNO and Hyper-Kamiokande, the mass ordering can already be determined at $\sim 2 σ$ CL, while $\mathcal{O}(10)$ events suffice for the discovery. Our method does not require high statistics and could be used within the supernova early warning system (SNEWS) which will have access to the time information on early supernova neutrino events recorded in a number of detectors. The method proposed in this paper also implies a crucial interplay between the mass ordering and the triangulation method for locating supernovae.
