Enhanced search sensitivity to the double beta decay of ^(136)Xe to excited states with topological signatures

作     者：Chen Xie Kaixiang Ni Ke Han Shaobo Wang Chen Xie;Kaixiang Ni;Ke Han;Shaobo Wang

作者机构：Institute of Nuclear and Paricle Physics(INPAC)Shanghai Laboratory for Particle Physics and CosmologyKey Laboratory for Partic le Astrophysics and Cosmology(MOE)School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China ParisTech Elite Institute of TechnologyShanghai Jiao Tong UniversiryShanghai 200240China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2021年第64卷第6期

页      面：41-50页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 

基　　金：supported by the National Key R&D Program of China(Grant No.2016YFA0400300) the National Natural Science Foundation of China(Grant Nos.11775142,and 11905127) the Chinese Academy of Sciences Center for Excellence in Particle Physics(CCEPP) 

主　　题：neutrino double beta decay topological signatures background suppression 

摘      要：The double beta decay of ^(136)Xe to excited states of 136Ba(DBD-ES)has not yet been discovered *** experimental signature of such decays,one or two gamma rays following the beta signals,can be identified more effectively in a gaseous detector with the help of topological *** have investigated key parameters of particle trajectories of DBD-ES with Monte Carlo simulation data of the proposed PandaX-III detector as an *** background rates can be reduced by about one order of magnitude while keeping more than half of signals with topological *** estimated half-life sensitivity of DBD-ES can be improved by 1.8 times to 4.1×10^(23) year(90%C.L.).Similarly,the half-life sensitivity of neutrinoless double beta decay of ^(136)Xe to excited states of 136Ba can be improved by a factor of 4.8 with topological signatures.