Model Independent Approach of the JUNO ${}^8$B Solar Neutrino Program

Abstract

The physics potential of detecting ${}^8$B solar neutrinos will be exploited at the Jiangmen Underground Neutrino Observatory (JUNO), in a model independent manner by using three distinct channels of the charged-current (CC), neutral-current (NC) and elastic scattering (ES) interactions. Due to the largest-ever mass of ${}^{13}$C nuclei in the liquid-scintillator detectors and the {expected} low background level, ${}^8$B solar neutrinos would be observable in the CC and NC interactions on ${}^{13}$C for the first time. By virtue of optimized event selections and muon veto strategies, backgrounds from the accidental coincidence, muon-induced isotopes, and external backgrounds can be greatly suppressed. Excellent signal-to-background ratios can be achieved in the CC, NC and ES channels to guarantee the ${}^8$B solar neutrino observation. From the sensitivity studies performed in this work, we show that JUNO, with ten years of data, can reach the {1$\sigma$} precision levels of 5%, 8% and 20% for the ${}^8$B neutrino flux, ${\sin }^2{\theta }_{12}$, and $\Delta m_{21}^2$, respectively. It would be unique and helpful to probe the details of both solar physics and neutrino physics. In addition, when combined with SNO, the world-best precision of 3% is expected for the ${}^8$B neutrino flux measurement.

19 pages, 7 figures, accepted version to appear in The Astrophysical Journal. Yufeng Li and Jiajie Ling are corresponding authors

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• A new Generation of Standard Solar Models
• Observational constraints on the origin of the elements. IV: The standard composition of the Sun
• Sub-percent Precision Measurement of Neutrino Oscillation Parameters with JUNO
• Higher metal abundances do not solve the solar problem
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Cited by in corpus (6)

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• Detecting fast-variation pulsations in solar hard X-ray and radio emissions
• A $\nu$ look at the Sun: Probing the conditions of the solar core using ${}^8$B neutrinos
• Towards First Detection of the Solar MSW Transition With JUNO
• New Spallation Background Rejection Techniques to Greatly Improve the Solar Neutrino Sensitivity of JUNO