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Feasibility and physics potential of detecting ^(8)B solar.neutr.nos at JUNO

Chinese Physics C 2021年第2期45卷 93-110页

作者： Angel Abusleme Thomas Adam Shakeel Ahmad Sebastiano Aiello Muhammad Akr.m Nawab Ali Fengpeng An Guangpeng An Qi An Giuseppe Andr.nico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Bur.n Asavapibhop João Pedr. Athayde Mar.ondes de Andr. Didier.Auguste Andrej Babic Wander.Baldini Andrea Bar.0}si Er.c Baussan Mar.o Bellato Antonio Ber.noli Enr.co Ber.ier. David Biare Thilo Bir.enfeld Sylvie Blin David Blum Simon Blyth Anastasia Bolshakova Mathieu Bongr.nd Clément Bor.ereau Dominique Breton Augusto Br.gatti r.ccar.o Br.gner. r.ccar.o Br.no Antonio Budano Max Buesken Mar.o Buscemi Jose Busto Ilya Butor.v Anatael Cabrer. Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao r.ssella Car.so Cédr.c Cer.a Jinfan Chang Yun Chang Pingping Chen Po-An Chen Shaomin Chen Shenjian Chen Xur.ng Chen Yi-Wen Chen Yixue Chen Yu Chen Zhang Chen Jie Cheng Yaping Cheng Alexander.Chepur.ov Davide Chiesa Pietr. Chimenti Ar.em Chukanov Anna Chuvashova Gér.r. Claver.e Catia Clementi Bar.ar. Cler.aux Selma Confor.i Di Lorenzo Daniele Cor.i Salvatore Costa Flavio Dal Cor.o Chr.stophe De La Taille Jiawei Deng Zhi Deng Ziyan Deng Wilfr.ed Depner.ng Mar.o Diaz Xuefeng Ding Yayun Ding Bayu Dir.antar. Ser.ey Dmitr.evsky Tadeas Dohnal Geor.y Donchenko Jianmeng Dong Damien Dor.ic Evgeny Dor.shkevich Mar.os Dr.cos Fr.dér.c Dr.illole Shuxian Du Stefano Dusini Mar.in Dvor.k Timo Enqvist Heike Enzmann Andrea Fabbr. Lukas Fajt Donghua Fan Lei Fan Can Fang Jian Fang Mar.o Far.etta Anna Fatkina Dmitr. Fedoseev Vladko Fekete Li-Cheng Feng Qichun Feng r.char. For. Andrey For.ozov Amélie Four.ier.Haonan Gan Feng Gao Alber.o Gar.agnini Alexandre Göttel Chr.stoph Genster.Mar.o Giammar.hi Agnese Giaz Nunzio Giudice Fr.nco Giuliani Maxim Gonchar.Guanghua Gong Hui Gong Oleg Gor.hakov Yur. Gor.ushkin Mar.o Gr.ssi Chr.stian Grewing Maxim Gr.mov Vasily Gr.mov Minghao Gu Xiaofei Gu Yu Gu Mengyun Guan Nunzio Guar.one Mar.a Gul Cong Guo Jingyuan Guo Wanlei Guo Xinheng Guo Yuhang Guo Paul Hackspacher.Caren Hagner.r.n Han Yan Yerevan Physics Institute YerevanArmenia Univer.itéLibre de Br.xelles BrusselsBelgium Univer.idade Estadual de Londr.na LondrinaBrazil Pontificia Univer.idade Catolica do r.o de Janeir. RioBrazil Pontificia Univer.idad Católica de Chile SantiagoChile Univer.idad Tecnica Feder.co Santa Mar.a ValparaisoChile Beijing Institute of Spacecr.ft Envir.nment Engineer.ng BeijingChina Beijing Nor.al Univer.ity BeijingChina China Institute of Atomic Ener.y BeijingChina Institute of High Ener.y Physics BeijingChina Nor.h China Electr.c Power.Univer.ity BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua Univer.ity BeijingChina Univer.ity of Chinese Academy of Sciences BeijingChina Jilin Univer.ity ChangchunChina College of Electr.nic Science and Engineer.ng National University of Defense TechnologyChangshaChina Chongqing Univer.ity ChongqingChina Dongguan Univer.ity of Technology DongguanChina Jinan Univer.ity GuangzhouChina Sun Yat-Sen Univer.ity GuangzhouChina Har.in Institute of Technology HarbinChina Univer.ity of Science and Technology of China HefeiChina The r.diochemistr. and Nuclear.Chemistr. Gr.up in Univer.ity of South China HengyangChina Wuyi Univer.ity JiangmenChina Shandong Univer.ity JinanChina Institute of Moder. Physics Chinese Academy of SciencesLanzhouChina Nanjing Univer.ity NanjingChina Guangxi Univer.ity NanningChina East China Univer.ity of Science and Technology ShanghaiChina School of Physics and Astr.nomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydr.geology and Envir.nmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai Univer.ity TianjinChina Wuhan Univer.ity WuhanChina Xi’an Jiaotong Univer.ity Xi’anChina Xiamen Univer.ity XiamenChina School of Physics and Micr.electr.nics Zhengzhou UniversityZhengzhouChina Institute of Physics National Chiao-Tung Univer.ity Hsinchu National United Univer.ity Miao-Li Depar.ment of Physics National T

The Jiangmen Under.r.und Neutr.no Obser.ator.(JUNO)features a 20 kt multi-pur.ose under.r.und liquid scintillator.sphere as its main *** of JUNO's features make it an excellent location for.8B solar.neutr.no measurements,such as its low-ener.y threshold,high ener.y resolution compared with water.Cherenkov detector.,and much lar.er.tar.et mass compared with previous liquid scintillator.*** this paper.we present a comprehensive assessment of JUNO's potential for.detecting^8B solar.neutr.nos via the neutr.no-electr.n elastic scatter.ng pr.cess.A reduced 2 MeV threshold for.the recoil electr.n ener.y is found to be achievable,assuming that the intr.nsic r.dioactive backgr.und^(238)U and^(232)Th in the liquid scintillator.can be contr.lled to 10^(-17)g/*** ten year. of data acquisition,appr.ximately 60,000 signal and 30,000 backgr.und events are *** lar.e sample will enable an examination of the distor.ion of the recoil electr.n spectr.m that is dominated by the neutr.no flavor.tr.nsfor.ation in the dense solar.matter.which will shed new light on the inconsistency between the measured electr.n spectr. and the predictions of the standar. three-flavor.neutr.no oscillation *** m^(2)_(21)=4.8times10^(-5);(7.5times10^(-5))eV^(2),JUNO can pr.vide evidence of neutr.no oscillation in the Ear.h at appr.ximately the 3sigma(2sigma)level by measur.ng the non-zer. signal r.te var.ation with respect to the solar.zenith ***,JUNO can simultaneously measureDelta m^2_(21)using^8B solar.neutr.nos to a precision of 20% or.better.depending on the centr.l value,and to sub-per.ent precision using reactor.antineutr.nos.A compar.son of these two measurements fr.m the same detector.will help under.tand the cur.0}nt mild inconsistency between the value of Delta m^2_(21)repor.ed by solar.neutr.no exper.ments and the KamLAND exper.ment.

关键词： neutr.no oscillation solar.neutr.no JUNO

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