The physics potential of detecting 8B 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 13C nuclei in the liquid scintillator detectors and the expected low background level, 8B solar neutrinos are observable in the CC and NC interactions on 13C 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 observation of the 8B solar neutrinos. From the sensitivity studies performed in this work, we show that JUNO, with 10 yr of data, can reach the 1σ precision levels of 5%, 8%, and 20% for the 8B neutrino flux, , and , respectively. Probing the details of both solar physics and neutrino physics would be unique and helpful. In addition, when combined with the Sudbury Neutrino Observatory measurement, the world's best precision of 3% is expected for the measurement of the 8B neutrino flux.

Model-independent Approach of the JUNO 8B Solar Neutrino Program / J. Zhao, B. Yue, H. Lu, Y. Li, J. Ling, Z. Yu, A. Abusleme, T. Adam, S. Ahmad, R. Ahmed, S. Aiello, M. Akram, A. Aleem, T. Alexandros, F. An, Q. An, G. Andronico, N. Anfimov, V. Antonelli, T. Antoshkina, B. Asavapibhop, J.P. Athayde Marcondes de André, D. Auguste, W. Bai, N. Balashov, W. Baldini, A. Barresi, D. Basilico, E. Baussan, M. Bellato, A. Bergnoli, T. Birkenfeld, S. Blin, D. Blum, S. Blyth, A. Bolshakova, M. Bongrand, C. Bordereau, D. Breton, A. Brigatti, R. Brugnera, R. Bruno, A. Budano, J. Busto, I. Butorov, A. Cabrera, B. Caccianiga, H. Cai, X. Cai, Y. Cai, Z. Cai, R. Callegari, A. Cammi, A. Campeny, C. Cao, G. Cao, J. Cao, R. Caruso, C. Cerna, C. Chan, J. Chang, Y. Chang, G. Chen, P. Chen, P. Chen, S. Chen, X. Chen, Y. Chen, Y. Chen, Z. Chen, Z. Chen, J. Cheng, Y. Cheng, A. Chepurnov, A. Chetverikov, D. Chiesa, P. Chimenti, A. Chukanov, G. Claverie, C. Clementi, B. Clerbaux, M.C. Molla, S. 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Model-independent Approach of the JUNO 8B Solar Neutrino Program

D. Basilico;L. Miramonti;A.C. Re;M.D. Claudio Torri;
2024

Abstract

The physics potential of detecting 8B 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 13C nuclei in the liquid scintillator detectors and the expected low background level, 8B solar neutrinos are observable in the CC and NC interactions on 13C 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 observation of the 8B solar neutrinos. From the sensitivity studies performed in this work, we show that JUNO, with 10 yr of data, can reach the 1σ precision levels of 5%, 8%, and 20% for the 8B neutrino flux, , and , respectively. Probing the details of both solar physics and neutrino physics would be unique and helpful. In addition, when combined with the Sudbury Neutrino Observatory measurement, the world's best precision of 3% is expected for the measurement of the 8B neutrino flux.
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
12-apr-2024
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