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Unambiguous determination of the neutrino mass hierarchy using reactor neutrinos
Li YF(李玉峰); Cao J(曹俊); Wang YF(王贻芳); 张良;Li, YF; Cao, J; Wang, YF; Zhan, L
2013
发表期刊PHYSICAL REVIEW D
卷号88期号:1页码:13008
摘要Determination of the neutrino mass hierarchy in a reactor neutrino experiment at the medium baseline is discussed. Observation of the interference effects between the Delta m(31)(2) and Delta m(32)(2) oscillations enables a relative measurement independent of the knowledge of the absolute mass-squared difference. With a 20 kton liquid scintillator detector of the 3%/root E (MeV) energy resolution, the Daya Bay II experiment at a baseline of similar to 50 km from reactors of total thermal power 36 GW can determine the mass hierarchy at a confidence level of Delta chi(2)(MH) similar to (10 divided by 12) (3 divided by 3.5 sigma) in six years after taking into account the real spatial distribution of reactor cores. We show that the unknown residual energy nonlinearity of the liquid scintillator detector has limited impact on the sensitivity due to the self-calibration of small oscillation peaks. Furthermore, an extra increase of Delta chi(2)(MH) similar or equal to 4(9) can be obtained, by including the precise measurement of the effective mass-squared difference Delta m(mu mu)(2) of expected relative error 1.5% (1%) from ongoing long-baseline muon neutrino disappearance experiments. The sensitivities from the interference and from absolute measurements can be cross-checked. When combining these two, the mass hierarchy can be determined at a confidence level of Delta chi(2)(MH) similar to (15 divided by 20) (4 sigma) in six years.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.88.013008
收录类别SCI
WOS记录号WOS:000321858800002
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被引频次:122[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224479
专题院士
实验物理中心
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Li YF,Cao J,Wang YF,et al. Unambiguous determination of the neutrino mass hierarchy using reactor neutrinos[J]. PHYSICAL REVIEW D,2013,88(1):13008.
APA 李玉峰.,曹俊.,王贻芳.,张良;Li, YF.,Cao, J.,...&Zhan, L.(2013).Unambiguous determination of the neutrino mass hierarchy using reactor neutrinos.PHYSICAL REVIEW D,88(1),13008.
MLA 李玉峰,et al."Unambiguous determination of the neutrino mass hierarchy using reactor neutrinos".PHYSICAL REVIEW D 88.1(2013):13008.
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