文献类型：期刊文献

英文题名：Detecting supernovae neutrino with Earth matter effect

作者：Liao, Wei[1]

机构：[1]East China Univ Sci & Technol, Sch Sci, Inst Modern Phys, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：94

期号：11

外文期刊名：PHYSICAL REVIEW D

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000391016400001)】；

基金：This work is supported by National Science Foundation of China(NSFC), Grants No. 11135009, No. 11375065, and Shanghai Key Laboratory of Particle Physics and Cosmology, Grant No. 15DZ2272100.

语种：英文

摘要：We study Earth matter effect in oscillations 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 a 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 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 is more freedom to vary energy bins and to optimize the signal of Earth matter effect in analyzing events of supernovae neutrinos.