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Potential impact of sub-structure on the determination of neutrino mass hierarchy at medium-baseline reactor neutrino oscillation experiments

文献类型：期刊论文

作者Cheng, ZK; Raper, N; Wang, W; Wong, CF; Zhang, JB
刊名EUROPEAN PHYSICAL JOURNAL C
出版日期2020
卷号80期号:12
DOI10.1140/epjc/s10052-020-08664-7
文献子类Article
英文摘要In the past decade, the precise measurement of the lastly known neutrino mixing angle theta 13 has enabled the resolution of neutrino mass hierarch (MH) at medium-baseline reactor neutrino oscillation (MBRO) experiments. Recent calculations of the reactor neutrino flux predict percent-level sub-structures in the nu e spectrum due to Coulomb effects in beta decay. Such fine structure in the reactor spectrum has been an issue of concern for efforts to determine the neutrino MH for the MBRO approach, the concern being that the sub-dominant oscillation pattern used to discriminate different hierarchies will be obscured by fine structure. The energy resolutions of current reactor experiments are not sufficient to measure such fine structure, and therefore the size and location in energy of these predicted discontinuities has not been confirmed experimentally. There has been speculation that a near detector is required with sufficient energy resolution to resolve the fine structure. This article studies the impact of fine structure on the resolution of MH, based on predicted reactor neutrino spectra, using the measured spectrum from Daya Bay as a reference. We also investigate how a near detector could improve the sensitivity of neutrino MH resolution based on various assumptions of near detector energy resolution.
语种英语
WOS记录号WOS:000597169700004
源URL[http://ir.ihep.ac.cn/handle/311005/297585]  
专题江门中微子实验
推荐引用方式
GB/T 7714		 Cheng, ZK,Raper, N,Wang, W,et al. Potential impact of sub-structure on the determination of neutrino mass hierarchy at medium-baseline reactor neutrino oscillation experiments[J]. EUROPEAN PHYSICAL JOURNAL C,2020,80(12).
APA Cheng, ZK,Raper, N,Wang, W,Wong, CF,&Zhang, JB.(2020).Potential impact of sub-structure on the determination of neutrino mass hierarchy at medium-baseline reactor neutrino oscillation experiments.EUROPEAN PHYSICAL JOURNAL C,80(12).
MLA Cheng, ZK,et al."Potential impact of sub-structure on the determination of neutrino mass hierarchy at medium-baseline reactor neutrino oscillation experiments".EUROPEAN PHYSICAL JOURNAL C 80.12(2020).

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来源：高能物理研究所

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