Searching for neutrino-less nouble neta necay of 136Xe with PandaX-Ⅱ liquid xenon detector  

作　　者：Kaixiang Ni Yihui Lai Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Lisheng Geng Karl Giboni Franco Giuliani Linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Yan Huang Yanlin Huang Zhou Huang Peng Ji Xiangdong Ji Yonglin Ju Kun Liang Huaxuan Liu Jianglai Liu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Parinya Namwongsa Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang Lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang Qiuhong Wang Siguang Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Jingkai Xia Mengjiao Xiao Pengwei Xie Binbin Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Dan Zhang Hongguang Zhang Tao Zhang Li Zhao Qibin Zheng Jifang Zhou Ning Zhou Xiaopeng Zhou 倪恺翔;赖奕辉;阿布都沙拉木·阿布都克力木;陈葳;谌勋;陈云华;崔祥仪;樊英杰;方德清;符长波;耿立升;Karl Giboni;Franco Giuliani;顾琳慧;郭绪元;韩柯;何昶达;黄迪;黄焱;黄彦霖;黄周;吉鹏;季向东;巨永林;梁昆;刘华萱;刘江来;马文博;马余刚;冒亚军;孟月;Parinya Namwongsa;宁金华;宁旭阳;任祥祥;商长松;司琳;谈安迪;王安庆;王宏伟;王萌;王秋红;王思广;王秀丽;王舟;武蒙蒙;吴世勇;夏经铠;肖梦姣;谢鹏伟;燕斌斌;杨继军;杨勇;喻纯旭;袁鞠敏;张丹;张宏光;张涛;赵力;郑其斌;周济芳;周宁;周小朋(INPAC and School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai Laboratory for Particle Physics and Cosmology,Shanghai 200240,China;Yalong River Hydropower Development Company,Ltd.,288 Shuanglin Road,Chengdu 610051,China;School of Physics,Nankai University,Tianjin 300071,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;School of Physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing 100191,China;School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Tsung-Dao Lee Institute,Shanghai 200240,China;School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;School of Physics,Peking University,Beijing 100871,China;Department of Physics,University of Maryland,College Park,Maryland 20742,USA;School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE),Shandong University,Jinan 250100,China;Center of High Energy Physics,Peking University,Beijing 100871,China)

机构地区：[1]INPAC and School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai Laboratory for Particle Physics and Cosmology,Shanghai 200240,China [2]Yalong River Hydropower Development Company,Ltd.,288 Shuanglin Road,Chengdu 610051,China [3]School of Physics,Nankai University,Tianjin 300071,China [4]Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China [5]School of Physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and Physics,Beihang University,Beijing 100191,China [6]School of Medical Instrument and Food Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China [7]Tsung-Dao Lee Institute,Shanghai 200240,China [8]School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [9]School of Physics,Peking University,Beijing 100871,China [10]Department of Physics,University of Maryland,College Park,Maryland 20742,USA [11]School of Physics and Key Laboratory of Particle Physics and Particle Irradiation(MOE),Shandong University,Jinan 250100,China [12]Center of High Energy Physics,Peking University,Beijing 100871,China

出　　处：《Chinese Physics C》2019年第11期1-10,共10页中国物理C（英文版）

基　　金：Supported by grants from the Ministry of Science and Technology of China(2016YFA0400301,2016YFA0400302);a Double Top-class grant from Shanghai Jiao Tong University,grants from National Science Foundation of China(11435008,11505112,11525522,11775142,11755001);grants from the Office of Science and Technology,Shanghai Municipal Government(11DZ2260700,16DZ2260200,18JC1410200);the support from the Key Laboratory for Particle Physics,Astrophysics and Cosmology,Ministry of Education;supported in part by the Chinese Academy of Sciences Center for Excellence in Particle Physics(CCEPP);Hongwen Foundation in Hong Kong

摘　　要：We report the Neutrino-less Double Beta Decay（NLDBD） search results from PandaX-Ⅱ dual-phase liquid xenon time projection chamber.The total live time used in this analysis is 403.1 days from June 2016 to August2018.With NLDBD-optimized event selection criteria,we obtain a fiducial mass of 219 kg of natural xenon.The accumulated xenon exposure is 242 kg yr,or equivalently 22.2 kg yr of 136Xe exposure.At the region around 136Xe decay Q-value of 2458 keV,the energy resolution of PandaX-Ⅱ is 4.2%.We find no evidence of NLDBD in PandaX-Ⅱand establish a lower limit for decay half-life of 2.1×1023yr at the 90% confidence level,which corresponds to an effective Majorana neutrino mass mββ <（1.4-3.7） eV.This is the first NLDBD result reported from a dual-phase xenon experiment.We report the Neutrino-less Double Beta Decay(NLDBD)search results from PandaX-II dual-phase liquid xenon time projection chamber.The total live time used in this analysis is 403.1 days from June 2016 to August 2018.With NLDBD-optimized event selection criteria,we obtain a fiducial mass of 219 kg of natural xenon.The accumulated xenon exposure is 242 kg·yr,or equivalently 22.2 kg·yr of 136Xe exposure.At the region around 136Xe decay Q-value of 2458 keV,the energy resolution of PandaX-II is 4.2%.We find no evidence of NLDBD in PandaX-II and establish a lower limit for decay half-life of 2.1 ×10^23 yr at the 90%confidence level,which corresponds to an effective Majorana neutrino mass mββ<(1.4-3.7) eV.This is the first NLDBD result reported from a dual-phase xenon experiment.

关 键 词：neutrino-less double beta decay DARK matter underground physics liquid XENON DETECTOR 

分 类 号：O57[理学—粒子物理与原子核物理]