Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?

Yu-feng Li; Yi-fang Wang; Zhi-zhong Xing

doi:10.1088/1674-1137/40/9/091001

Chinese Physics C> 2016, Vol. 40> Issue(9) : 091001 DOI: 10.1088/1674-1137/40/9/091001

Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?

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Abstract：
We have carefully examined, in both analytical and numerical ways, how small the terrestrial matter effects can be in a given medium-baseline reactor antineutrino oscillation experiment like JUNO or RENO-50. Taking the forthcoming JUNO experiment as an example, we show that the inclusion of terrestrial matter effects may reduce the sensitivity of the neutrino mass ordering measurement by Δχ_MO²≈0.6, and a neglect of such effects may shift the best-fit values of the flavor mixing angle θ₁₂ and the neutrino mass-squared difference Δ₂₁ by about 1σ to 2σ in the future data analysis. In addition, a preliminary estimate indicates that a 2σ sensitivity of establishing the terrestrial matter effects can be achieved for about 10 years of data taking at JUNO with the help of a suitable near detector implementation.
- terrestrial matter effects ,
- reactor antineutrino oscillations

References

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Yu-feng Li, Yi-fang Wang and Zhi-zhong Xing. Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?[J]. Chinese Physics C, 2016, 40(9): 091001. doi: 10.1088/1674-1137/40/9/091001

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Received: 2016-05-05

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Supported by National Natural Science Foundation of China (11135009, 11305193), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA10010100) and the CAS Center for Excellence in Particle Physics

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?

Corresponding author: Yu-feng Li,

Corresponding author: Yi-fang Wang,

Corresponding author: Zhi-zhong Xing,

Received Date: 2016-05-05

Available Online: 2016-09-05

Fund Project: Supported by National Natural Science Foundation of China (11135009, 11305193), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDA10010100) and the CAS Center for Excellence in Particle Physics

Abstract: We have carefully examined, in both analytical and numerical ways, how small the terrestrial matter effects can be in a given medium-baseline reactor antineutrino oscillation experiment like JUNO or RENO-50. Taking the forthcoming JUNO experiment as an example, we show that the inclusion of terrestrial matter effects may reduce the sensitivity of the neutrino mass ordering measurement by Δχ_MO²≈0.6, and a neglect of such effects may shift the best-fit values of the flavor mixing angle θ₁₂ and the neutrino mass-squared difference Δ₂₁ by about 1σ to 2σ in the future data analysis. In addition, a preliminary estimate indicates that a 2σ sensitivity of establishing the terrestrial matter effects can be achieved for about 10 years of data taking at JUNO with the help of a suitable near detector implementation.

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Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?

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