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arXiv 1607.03334hep-phastro-ph.HEhep-ex
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利用地球物质效应探测超新星中微子

Detecting supernovae neutrino with Earth matter effect

Wei Liao

摘要:

研究了超新星中微子振荡中的地球物质效应。我们发现,探测地球物质效应给出了超新星中微子谱的独立测量,即超新星中微子谱的味道差异。研究了末级电子或正电子的能量分辨率和角分辨率对探测地球物质效应信号的影响。我们发现,在分析中改变能量箱的宽度可以改变地球物质效应的信号强度和统计起伏。合理选择能量仓既能抑制统计起伏,又能使信号强度相对于统计起伏有较好的反映。因此,优选具有良好能量分辨率和良好角分辨率的中微子探测器,使得在分析超新星中微子事件时有更大的自由度来改变能量仓和优化地球物质效应的信号。

英文摘要:

We study Earth matter effect in oscillation of supernovae neutrinos. We show that detecting Earth matter effect gives an independent measurement of spectra of supernovae neutrinos, i.e. the flavor difference of the spectra of supernovae neutrinos. We study the effect of energy resolution and angular resolution of final electron or positron on detecting the signal of Earth matter effect. We show that varying the widths of energy bins in analysis can change the signal strength of Earth matter effect and the statistical fluctuation. A reasonable choice of energy bins can both suppress the statistical fluctuation and make out a good signal strength relative to the statistical fluctuation. Neutrino detectors with good energy resolution and good angular resolution are therefore preferred so that there are more freedom to vary energy bins and to optimize the signal of Earth matter effect in analyzing events of supernovae neutrinos.

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。

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