标题： 5个理由预期SN 1987A中微子谱中存在8 MeV线 显示英文标题

标题： 5 Reasons to expect an 8 MeV line in the SN 1987A neutrino spectrum

摘要： 之前有报道指出，在SN 1987A事件中，基于在Kamiokande-II探测器上记录的997个事件分析，发现了一个与之相关的8 MeV中微子线。然而，该声称的中微子线出现在背景谱的峰值处，且两者的形状相似，使得该说法最为薄弱。本文通过提供五个理由来支持这一说法。论文的最后一部分涉及正在进行的KATRIN实验，以寻找中微子质量，如果该实验验证了一个有争议的中微子质量3 + 3模型，包括一个快子（m2 < 0）质量，这可能会为该中微子线提供额外的支持。 显示英文摘要

摘要： Evidence was previously reported for an 8 MeV neutrino line associated with SN 1987A based on an analysis of 997 events recorded in the Kamiokande-II detector on the day of the supernova. That claimed line, however, occurred at the peak of the background spectrum, and both had a similar shape, making the claim tenuous at best. Here the claim is buttressed by providing five reasons to expect such an 8 MeV neutrino line. A final section of the paper concerns the ongoing KATRIN experiment to find the neutrino mass, which might provide additional support for the line, should it validate a controversial 3 + 3 model of the neutrino masses, including a tachyonic (m2 < 0) mass.