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2019

Why matter effects matter for JUNO

Khan, Amir N., Nunokawa, Hiroshi, Parke, Stephen J.

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In this paper we focus on the Earth matter effects for the solar parameter determination by a medium baseline reactor experiment such as JUNO.

We derive perturbative expansions for the mixing angles $\theta_{12}$ and $\theta_{13}$ as well as the $\Delta m^2_{21}$ and $\Delta m^2_{31}$ in terms of the matter potential relevant for JUNO.
These expansions, up to second order in the matter potential, while simple, allow one to calculate the electron antineutrino survival probability to a precision much better than needed for the JUNO experiment.
We use these perturbative expansions to semi-analytically explain and confirm the shift caused by the matter effects on the solar neutrino mixing parameters $\theta_{12}$ and $\Delta m^2_{21}$ which were previously obtained by a purely numerical $\chi^2$ analysis.

Why matter effects matter for JUNO · Around

Built on

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T. Abrahão, H. Minakata, H. Nunokawa and A. A. Quiroga, “Constraint on Neutrino Decay with Medium-Baseline Reactor Neutrino Oscillation Experiments,” JHEP 1511
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Then

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?", Chinese Physics C Vol. 40, No. 9 091001 (2016)
2016
Later among the works it cites.
P. B. Denton, H. Minakata and S. J. Parke, “Compact Perturbative Expressions For Neutrino Oscillations in Matter,” JHEP 1606
Original
2016
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F. Capozzi et al., "Current unknowns in the three-neutrino framework", Prog. Part. Nucl. Phys. 102
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