Feasibility and physics potential of detecting B-8 solar neutrinos at JUNO

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10437189" target="_blank" >RIV/00216208:11320/21:10437189 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lyb~up.bH5" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=lyb~up.bH5</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1674-1137/abd92a" target="_blank" >10.1088/1674-1137/abd92a</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Feasibility and physics potential of detecting B-8 solar neutrinos at JUNO

Popis výsledku v původním jazyce

The Jiangmen Underground Neutrino Observatory (JUNO) features a 20 kt multi-purpose underground liquid scintillator sphere as its main detector. Some of JUNO&apos;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&apos;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.

Název v anglickém jazyce

Feasibility and physics potential of detecting B-8 solar neutrinos at JUNO

Popis výsledku anglicky

The Jiangmen Underground Neutrino Observatory (JUNO) features a 20 kt multi-purpose underground liquid scintillator sphere as its main detector. Some of JUNO&apos;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&apos;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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10300 - Physical sciences

Projekt

<a href="/cs/project/LTT17021" target="_blank" >LTT17021: Reaktorové neutrinové experimenty Daya Bay a JUNO</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chinese Physics C

ISSN

1674-1137

e-ISSN

—

Svazek periodika

45

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CN - Čínská lidová republika

Počet stran výsledku

18

Strana od-do

023004

Kód UT WoS článku

000608871800001

EID výsledku v databázi Scopus

2-s2.0-85100798026