arXiv 1109.26672011-09-13astro-ph.HEhep-ph

超新星中微子的液氩探测和中微子磁矩

Supernova neutrino signals by liquid Argon detector and neutrino magnetic moment

Takashi Yoshida, Akira Takamura, Keiichi Kimura, Shio Kawagoe, Toshitaka Kajino, Hidekazu Yokomakura

备注：: 7 pages, 4 figures, 3 tables, accepted for publication in Physics Letters B
DOI：: 10.1016/j.physletb.2011.09.041

摘要：

本文研究了用10万吨液态氩探测器探测到的强磁场超新星的电子中微子和电子反中微子信号。我们考虑了共振自旋-味道转换、物质效应和中微子自相互作用对中微子味道的影响。不同的中微子振荡参数和中微子磁矩可以产生不同的中微子信号，其特征在于中微子爆发事件和电子-中微子和电子-反中微子事件总数。用100 kton液态Ar探测器观测超新星中微子信号将限制振荡参数以及中微子磁矩在正常和反转质量等级中的分布。

英文摘要：

We study electron-neutrino and electron-antineutrino signals from a supernova with strong magnetic field detected by a 100 kton liquid Ar detector. The change of neutrino flavors by resonant spin-flavor conversions, matter effects, and neutrino self-interactions are taken into account. Different neutrino signals, characterized by neutronization burst event and the total event numbers of electron-neutrinos and electron-antineutrinos, are expected with different neutrino oscillation parameters and neutrino magnetic moment. Observations of supernova neutrino signals by a 100 kton liquid Ar detector would constrain oscillation parameters as well as neutrino magnetic moment in either normal and inverted mass hierarchies.

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