Determination of Double Beta Decay Half-Life of 136Xe with the PandaX-4T Natural Xenon Detector.

Lin Si,Xiaoying Lu,Binbin Yan,Pengwei Xie,Meng Wang,Shuaijie Li,Yunyang Luo,Zihao Bo,Mengting Fu,Wei Chen,Li Zhao,Xiangxiang Ren,Zhou Wang,Dan Zhang,Jifang Zhou,Xun Chen,Shaobo Wang,Jiafu Li,Xuyuan Guo,Ying Yuan,Siguang Wang,Shu Li,Minzhen Zhang,Changbo Fu,Abdusalam Abdukerim,Zhe Yuan,Xiangdong Ji,Shibo Zhang,Xiang Xiao,Lingyin Luo,Jianglai Liu,Jinrong He,Shu Zhang,Di Huang,Yanlin Huang,Linhui Gu,Nasir Shaheed,Peng Zhang,Andi Tan,Jingkai Xia,Yunhua Chen,Qiuhong Wang,Xiyu Yan,Changsong Shang,Xiuli Wang,Jumin Yuan,Yi Tao,Wenliang Sun,Qibin Zheng,Mingchuan Li,Changda He,Yunshan Cheng,Yonglin Ju,Chenxiang Li,Yugang Ma,Wenbo Ma,Ruquan Hou,Wei Wang,Xiaopeng Zhou,Xuyang Ning,Ningchun Qi,Tao Zhang,Yong Zhou,Weihao Wu,Xiaofeng Shang,Jijun Yang,Karl Giboni,Zhou Qian ,N Zhou ,Y Mao ,Zhaokan Cheng ,Zhongqiang Huang ,C X Yu ,K Han ,M Wu ,Y Meng ,Q Lin ,C H Cheng ,Guangqiu Shen ,De-Qing Fang ,Y Wei ,M Xiao ,Li-Sheng Geng ,X F Cui ,Y Yang ,Fan Yang ,Andrew Wang

doi:10.34133/2022/9798721

Determination of Double Beta Decay Half-Life of 136Xe with the PandaX-4T Natural Xenon Detector.

Lin Si, Xiaoying Lu + Show 85 more

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https://doi.org/10.34133/2022/9798721

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Journal: Research (Washington, D.C.)	Publication Date: Jan 1, 2022
Citations: 6	License type: CC BY 4.0

Affiliation: Shanghai Jiao Tong University, Shandong University, Shandong University of Science and Technology, University of Science and Technology of China, Peking University, University of Maryland, College Park, Yalong Hydro (China), Sun Yat-sen University, Institute of Modern Physics, Fudan University, Nankai University, University of Shanghai for Science and Technology, Beihang University

#Natural Xenon #Double Beta Decay + Show 8 more

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Abstract

Precise measurement of two-neutrino double beta decay (DBD) half-life is an important step for the searches of Majorana neutrinos with neutrinoless double beta decay. We report the measurement of DBD half-life of 136Xe using the PandaX-4T dual-phase Time Projection Chamber (TPC) with 3.7-tonne natural xenon and the first 94.9-day physics data release. The background model in the fiducial volume is well constrained in situ by events in the outer active region. With a 136Xe exposure of 15.5 kg-year, we establish the half-life as 2.27 ± 0.03(stat.) ± 0.10(syst.) × 1021 years. This is the first DBD half-life measurement with natural xenon and demonstrates the physics capability of a large-scale liquid xenon TPC in the field of rare event searches.

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