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arXiv · 1605.00900

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

Yu-Feng Li·Yifang Wang·Zhi-zhong Xing
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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 ongoing JUNO experiment for example, we show that the inclusion of terrestrial matter effects may reduce the sensitivity of the neutrino mass ordering measurement by Δχ^2_{\rm MO} \simeq 0.6, and a neglect of such effects may shift the best-fit values of the flavor mixing angle θ_{12} and the neutrino mass-squared difference Δ_{21} by about 1σto 2σin the future data analysis. In addition, a preliminary estimate indicates that a 2σsensitivity of establishing the terrestrial matter effects can be achieved for about 10 years of data taking at JUNO with the help of a proper near detector implementation.

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Yu-Feng Li, Yifang Wang, Zhi-zhong Xing. 2016-05-15. Terrestrial matter effects on reactor antineutrino oscillations at JUNO or RENO-50: how small is small?. https://doi.org/10.1088/1674-1137%2F40%2F9%2F091001

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