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

查看全文 作　　者：[1]倪恺翔;[1]赖奕辉;阿布都沙拉木·[1]阿布都克力木;[1]陈葳;[1]谌勋;[2]陈云华;[1]崔祥仪;[3]樊英杰;[4]方德清;[1]符长波;[5]耿立升;Karl [1]Giboni;Franco [1]Giuliani;[1]顾琳慧;[2]郭绪元;[1]韩柯;[1]何昶达;[1]黄迪;[2]黄焱;[6]黄彦霖;[1]黄周;[3]吉鹏;[1,7]季向东;[8]巨永林;[1]梁昆;[8]刘华萱;[1,7]刘江来;[1]马文博;[1]马余刚;[9]冒亚军;[1]孟月;Parinya [1]Namwongsa;[2]宁金华;[1]宁旭阳;[1,8]任祥祥;[2]商长松;[1]司琳;[10]谈安迪;[11]王安庆;[4]王宏伟;[11]王萌;[4]王秋红;[9]王思广;[8]王秀丽;[10,12]王舟;[3]武蒙蒙;[2]吴世勇;[1]夏经铠;[10,12]肖梦姣;[7]谢鹏伟;[11]燕斌斌;[1]杨继军;[1]杨勇;[3]喻纯旭;[11]袁鞠敏;[10]张丹;[1]张宏光;[1]张涛;[1]赵力;[6]郑其斌;[2]周济芳;[1]周宁;[5]周小朋

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》索引2019年第43卷第11期,共10页

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 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

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

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