arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1709.09453hep-ph
收藏

利用超新星中微子的短时特性确定中微子质量等级的可能性

On the Possibility to Determine Neutrino Mass Hierarchy via Supernova Neutrinos with Short-Time Characteristics

Junji Jia, Yaoguang Wang, Shun Zhou

摘要:

本文研究了通过对超新星中微子的高统计实时观测来确定中微子质量等级的可能性。其基本思想是利用不同的中微子质量本征态的不同的飞行时间从核心坍缩超新星到地球,这可能会显着改变中微子事件的时间分布在未来的巨大的水切伦科夫和液体闪烁体探测器。为了说明,我们考虑两种不同的情况。第一种情况是在核心坍缩超新星的前几十毫秒内发射的$ν^{}_e$的中子化爆发,而第二种情况是在吸积阶段形成的黑洞,中微子信号预计会突然终止。在后一种情况下,只有当超新星的距离为几兆秒差距,而探测器的基准质量为千兆吨时,我们才能区分正常和反向中微子质量等级。在前一种情况下,由于统计数据不佳,这种歧视的概率甚至更小。

英文摘要:

In this paper, we investigate whether it is possible to determine the neutrino mass hierarchy via a high-statistics and real-time observation of supernova neutrinos with short-time characteristics. The essential idea is to utilize distinct times-of-flight for different neutrino mass eigenstates from a core-collapse supernova to the Earth, which may significantly change the time distribution of neutrino events in the future huge water-Cherenkov and liquid-scintillator detectors. For illustration, we consider two different scenarios. The first case is the neutronization burst of $ν^{}_e$ emitted in the first tens of milliseconds of a core-collapse supernova, while the second case is the black hole formation during the accretion phase for which neutrino signals are expected to be abruptly terminated. In the latter scenario, it turns out only when the supernova is at a distance of a few Mpc and the fiducial mass of the detector is at the level of gigaton, might we be able to discriminate between normal and inverted neutrino mass hierarchies. In the former scenario, the probability for such a discrimination is even less due to a poor statistics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑