Exploring Solar Neutrino Oscillation Parameters with LSC at Yemilab and JUNO

TL;DR

This study assesses the capabilities of liquid scintillator detectors at Yemilab and JUNO in precisely measuring solar neutrino oscillation parameters, highlighting their complementary sensitivities depending on the true value of m^2_{21}.

Contribution

It provides a comparative analysis of Yemilab and JUNO's sensitivities to _{12} and m^2_{21} using combined reactor and solar neutrino data, emphasizing the impact of m^2_{21} values on measurement precision.

Findings

Yemilab's LSC is highly sensitive to _{12}, enabling precise determination.

JUNO outperforms Yemilab for larger m^2_{21} values, with about twice the precision.

Yemilab's LSC has better precision for smaller m^2_{21} values, closer to solar neutrino best fits.

Abstract

We investigate the sensitivities of the liquid scintillator counter (LSC) at Yemilab and JUNO to solar neutrino oscillation parameters, focusing on $\theta_{12}$ and $\Delta m^2_{21}$. We compare the potential of JUNO with LSC at Yemilab utilizing both reactor and solar data in determining those parameters. We find that the solar neutrino data of LSC at Yemilab is highly sensitive to $\theta_{12}$ enabling its determination with exceptional precision. Our study also reveals that if $\Delta m^2_{21}$ is larger, with a value close to the best fit value of KamLAND, JUNO reactor data will have about two times better precision than the reactor LSC at Yemilab. On the other hand, if $\Delta m^2_{21}$ is smaller and closer to the best fit value of solar neutrino experiments, the precision of the reactor LSC at Yemilab will be better than JUNO.