Panda X-III： Searching for neutrinoless double beta decay with high pressure ^(136)Xe gas time projection chambers  

作　　者：Xun Chen Chang Bo Fu Javier Galan Karl Giboni Franco Giuliani Ling Hui Gu Ke Han Xiang Dong Ji Heng Lin Jiang Lai Liu Kai Xiang Ni Hiroki Kusano Xiang Xiang Ren Shao Bo Wang Yong Yang Dan Zhang Tao Zhang Li Zhao Xiang Ming Sun Shou Yang Hu Si Yu Jian Xing Long Li Xiao Mei Li Hao Liang Huan Qiao Zhang Ming Rui Zhao Jing Zhou Ya Jun Mao Hao Qiao Si Guang Wang Ying Yuan Meng Wang Amir N.Khan Neill Raper Jian Tang Wei Wang Jia Ning Dong Chang Qing Feng Cheng Li Jian Bei Liu Shu Bin Liu Xiao Lian Wang Dan Yang Zhu Juan F.Castel Susana Cebri'an Theopisti Dafni Javier G.Garza Igor G.Irastorza Francisco J.Iguaz Gloria Luz ′on Hector Mirallas Stephan Aune Eric Berthoumieux Yann Bedfer Denis Calvet Nicole d'Hose Alain Delbart Maria Diakaki Esther Ferrer-Ribas Andrea Ferrero Fabienne Kunne Damien Neyret Thomas Papaevangelou Franck Sabatie Maxence Vanderbroucke AnDi Tan Wick Haxton Yuan Mei Chinorat Kobdaj Yu-Peng Yan 

机构地区：[1]NPAC and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Laboratory for Particle Physics and Cosmology, Shanghai 200240, China [2]College of Physical Science and Technology, Central China Normal University, Wuhan 430079, China [3]China Institute of Atomic Energy, Beijing 102413, China [4]School of Physics, Peking University, Beijing 100871, China [5]School of Physics and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Jinan 250100, China [6]School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China [7]Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China [8]State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China [9]University ofZaragoza, C/P Cerbuna 12 50009, Zaragoza, Spain [10]IRFU, CEA, Universite Paris-Saclay, F-91191 Gif-sur-Yvette, France [11]Department of Physics, University of Maryland, College Park, MD 20742, USA [12]Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA [13]Center for Excellence in High Energy Physics and Astrophysics, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand

出　　处：《Science China(Physics,Mechanics & Astronomy)》2017年第6期8-47,共40页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Key Programme for Research and Development (NKPRD) (Grant No. 2016YFA0400300);Shanghai Jiao Tong University (SJTU) for their financial and technical support;technical and administrative assistance from China Jin Ping Underground Laboratory (CJPL);the European Research Council (Grant No. ERC-2009-St G-240054)

摘　　要：Searching for the neutrinoless double beta decay(NLDBD)is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments.Panda X-III(particle and astrophysical xenon experiment III)will search for the NLDBD of136Xe at the China Jin Ping Underground Laboratory(CJPL).In the first phase of the experiment,a high pressure gas Time Projection Chamber(TPC)will contain 200 kg,90%136Xe enriched gas operated at10 bar.Fine pitch micro-pattern gas detector(Microbulk Micromegas)will be used at both ends of the TPC for the charge readout with a cathode in the middle.Charge signals can be used to reconstruct the electron tracks of the NLDBD events and provide good energy and spatial resolution.The detector will be immersed in a large water tank to ensure～5 m of water shielding in all directions.The second phase,a ton-scale experiment,will consist of five TPCs in the same water tank,with improved energy resolution and better control over backgrounds.Searching for the neutrinoless double beta decay（NLDBD）is now regarded as the topmost promising technique to explore the nature of neutrinos after the discovery of neutrino masses in oscillation experiments.Panda X-III（particle and astrophysical xenon experiment III）will search for the NLDBD of136Xe at the China Jin Ping Underground Laboratory（CJPL）.In the first phase of the experiment,a high pressure gas Time Projection Chamber（TPC）will contain 200 kg,90%136Xe enriched gas operated at10 bar.Fine pitch micro-pattern gas detector（Microbulk Micromegas）will be used at both ends of the TPC for the charge readout with a cathode in the middle.Charge signals can be used to reconstruct the electron tracks of the NLDBD events and provide good energy and spatial resolution.The detector will be immersed in a large water tank to ensure～5 m of water shielding in all directions.The second phase,a ton-scale experiment,will consist of five TPCs in the same water tank,with improved energy resolution and better control over backgrounds.

关 键 词：neutrinoless double beta decay lepton number violation underground experiment TPC Micromegas 

分 类 号：O572.321[理学—粒子物理与原子核物理] O571.322[理学—物理]