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Searching for neutrino-less double beta decay of ^136Xe with PandaX-II liquid xenon detector

《中国物理C:英文版》2019年 第11期 | 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)Lisheng Geng(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
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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.
【分 类】【数理科学和化学】 > 原子核物理学、高能物理学
【关键词】 neutrino-less double beta decay dark matter underground physics liquid xenon detector
【出 处】 《中国物理C:英文版》2019年 第11期 1-10页 共10页
【收 录】 中文科技期刊数据库

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