A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Feasibility and physics potential of detecting 8B solar neutrinos at JUNO (2021)

JUNO Collaboration. (2021). Feasibility and physics potential of detecting 8B solar neutrinos at JUNO. Chinese Physics C, 45(2), Article 023004. https://doi.org/10.1088/1674-1137/abd92a

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: JUNO Collaboration

Lehti tai sarja: Chinese Physics C

ISSN: 1674-1137

eISSN: 2058-6132

Julkaisuvuosi: 2021

Ilmestymispäivä: 20.01.2021

Volyymi: 45

Lehden numero: 2

Artikkelinumero: 023004

Kustantaja: IOP Publishing

Julkaisumaa: Britannia

Julkaisun kieli: englanti

DOI: https://doi.org/10.1088/1674-1137/abd92a

Julkaisun avoin saatavuus: Avoimesti saatavilla

Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/74430

Rinnakkaistallenteen verkko-osoite (pre-print): https://arxiv.org/abs/2006.11760

Tiivistelmä

The Jiangmen Underground Neutrino Observatory (JUNO) features a 20 kt multi-purpose underground liquid scintillator sphere as its main detector. Some of JUNO's features make it an excellent location for B-8 solar neutrino measurements, such as its low-energy threshold, high energy resolution compared with water Cherenkov detectors, and much larger target mass compared with previous liquid scintillator detectors. In this paper, we present a comprehensive assessment of JUNO's potential for detecting B solar neutrinos via the neutrino-electron elastic scattering process. A reduced 2 MeV threshold for the recoil electron energy is found to be achievable, assuming that the intrinsic radioactive background U-238 and Th-232 in the liquid scintillator can be controlled to 10(-17) g/g. With ten years of data acquisition, approximately 60,000 signal and 30,000 background events are expected. This large sample will enable an examination of the distortion of the recoil electron spectrum that is dominated by the neutrino flavor transformation in the dense solar matter, which will shed new light on the inconsistency between the measured electron spectra and the predictions of the standard three-flavor neutrino oscillation framework. If Delta m(21)(2) = 4.8 x 10(-5) (7.5 x 10(-5)) eV(2), JUNO can provide evidence of neutrino oscillation in the Earth at approximately the 3 sigma(2 sigma) level by measuring the non-zero signal rate variation with respect to the solar zenith angle. Moreover, JUNO can simultaneously measure Delta m(21)(2) using B-8 solar neutrinos to a precision of 20% or better, depending on the central value, and to sub-percent precision using reactor antineutrinos. A comparison of these two measurements from the same detector will help understand the current mild inconsistency between the value of Delta m(21)(2) reported by solar neutrino experiments and the KamLAND experiment.

YSO-asiasanat: hiukkasfysiikka; ydinfysiikka; neutriinot; neutriino-oskillaatio; tutkimuslaitteet; ilmaisimet

Vapaat asiasanat: solar neutrino; JUNO

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2021

JUFO-taso: 1