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Detection of supernova neutrinos at spallation neutron sources

Chinese Physics C 2016年第7期40卷 15-21页

作者：黄明阳郭新恒杨炳麟 Institute of High Energy Physics(IHEP) Chinese Academy of Sciences(CAS)Beijing 100049China Dongguan Institute of Neutron Science(DINS) Dongguan 523808China College of Nuclear Science and Technology Beijing Normal UniversityBeijing 100875China Department of Physics and Astronomy Iowa State UniversityAmesIowa 5001USA Institute of Theoretical Physics Chinese Academy of SciencesBeijing 100190China

After considering supernova shock effects, Mikheyev-Smirnov-Wolfenstein effects, neutrino collective ef- fects, and Earth matter effects, the detection of supernova neutrinos at the China Spallation Neutron Source is studied and the expected numbers of different flavor supernova neutrinos observed through various reaction chan- nels are calculated with the neutrino energy spectra described by the Fermi-Dirac distribution and the ＂beta fit＂ distribution respectively. Furthermore, the numerical calculation method of supernova neutrino detection on Earth is applied to some other spallation neutron sources, and the total expected numbers of supernova neutrinos observed through different reactions channels are given.

关键词： neutron source supernova neutrinos neutrino effects number

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Detection of supernova neutrinos on the Earth for Large θ_(13)

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Communications in Theoretical Physics 2014年第2期61卷 226-234页

作者：徐晶黄明阳胡立军郭新恒杨炳麟 College of Nuclear Science and Technology Beijing Normal University Institute of High Energy Physics Chinese Academy of Sciences Department of Physics and Astronomy Iowa State University Institute of Theoretical Physics Chinese Academy of Sciences

supernova （SN） neutrinos detected on the Earth are subject to the shock wave effects, the Mikheyev- Smirnov-Wolfenstein （MSW） effects, the neutrino collective effects and the Earth matter effects. Considering the recent experimental result about the large mixing angle 013 （-8.8°） provided by the Daya Bay Collaboration and applying the available knowledge for the neutrino conversion probability in the high resonance region of SN, PH , which is in the form of hypergeometric function in the case of large 813, we deduce the expression of PH taking into account the shock wave effects. It is found that PH is not zero in a certain range of time due to the shock wave effects. After considering all the four physical effects and scanning relevant parameters, we calculate the event numbers of SN neutrinos for the ＂Garehing＂ distribution of neutrino energy spectrum. From the numerical results, it is found that the behaviors of neutrino event numbers detected on the Earth depend on the neutrino mass hierarchy and neutrino spectrum parameters including the dimensionless pinching parameter βa （where a refers to neutrino flavor）, the average energy 〈Ea〉, and the SN neutrino luminosities La. Finally, we give the ranges of SN neutrino event numbers that will be detected at the Daya Bay experiment.

关键词： supernova neutrinos Daya Bay experiment 813 shock wave effects MSW effects PH

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