Spherical statistical tests on the angular distributions of electrons of the IMB events associated with SN 1987A.
Spherical statistical tests on the angular distributions of electrons of the IMB events associated with SN 1987A.
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对与 SN 1987A 相关的 IMB 事件的电子角分布进行球面统计测试。
DOI：
10.1103/physrevd.47.5228
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Nakatsuka
中科院分区：
文献类型：
--
作者：
Konishi;Kitamura;Chikawa;Tsuji;Nakatsuka
使用各种统计方法，许多研究人员声称，根据SN 1987 A发射的中微子的电子极角«cosθ»分布，IMB数据似乎具有非各向同性分布，而Kamiokande数据显示各向同性分布。他们断言，仅用俘获过程ν e + p → n + e +很难解释这种分布。然而，他们似乎没有成功地使用极角和方位角来测试球形分布，因为他们只使用极角来计算，同时先验地保持方位角均匀。此外，IMB事件的方位角分布受到超新星爆炸时部分光电倍增管高压电源故障导致的轨道缺失的影响
Using various statistical methods, many investigators have claimed on the basis of the polar angle «cosθ» distribution of electrons from neutrinos emitted from SN 1987A that the IMB data seem to have a nonisotropic distribution, whereas the Kamiokande data show an isotropic distribution. They assert that it is difficult to explain the distribution only by the capture process ν e + p → n + e + . However, they do not seem to have succeeded in testing spherical distributions using both the polar and azimuthal angles because they calculate using only the polar angle while keeping the azimuthal angle uniform a priori. Also, the azimuthal angle distribution of the IMB events has been affected by the lack of tracks due to the failure at the high-voltage supply to a part of the photomultiplier tubes at the time of the supernova explosion