Constraints on axion couplings from the CDEX-1 experiment at the China Jinping Underground Laboratory

S K Liu ,J Li,Q Wang,H Gong,L Singh,Y H Chen ,Chengfeng Yang ,X H Zeng ,Hao Jiang ,Jing Ren ,Zhi Deng ,J M Li ,C X Yu ,Y H Zhang ,Y J Li ,T Xue,Xichao Ruan ,Qingming He ,L Wang,X Q Li ,J J Zhu ,Jianping Cheng ,J M Wang ,H T Wong ,Y C Wu ,L Zhang,J Q Qin ,Zhi Zeng ,Manbin Shen ,C J Tang ,Yi Nan ,J Cheng ,M K Singh ,Q H Chen ,Z Y Zhou ,F K Lin ,Hui Ma ,X Li,Qian Yue ,Hanxiong Huang ,Hao Yu ,Xunzhen Yu ,Wei Zhu ,Xiyu Zhu ,Qikui Du ,L Lu ,Y L Li ,Hao-Yang Xing ,N Chen,Shiyong Wu ,H B Li ,Zhong-Zhi Xianyu ,Jian Su ,K Kang ,Y Xu,H He ,Fangzhou Xu ,L T Yang ,S W Yang ,V Sharma,Shou-De Lin ,A K Soma ,Xiaofeng Xu ,J L ,S J Mao ,M G Zhao ,J H Chen ,R Xiao ,Wei Zhao ,X Y Li ,Zhonghua Zhu

doi:10.1103/physrevd.95.052006

Abstract

We report the results of searches for solar axions and galactic dark matter axions or axion-like particles with CDEX-1 experiment at the China Jinping Underground Laboratory, using 335.6 kg-days of data from a p-type point-contact germanium detector. The data are compatible with the background model and no excess signals are observed. Limits of solar axions on the model independent coupling $g_{Ae}<2.5\times10^{-11}$ from Compton, bremsstrahlung, atomic-recombination and deexcitation channel and $g^{\text{eff}}_{AN}\times g_{Ae}<6.1\times10^{-17}$ from $^{57}$Fe M1 transition at 90 % confidence level are derived. Within the framework of the DFSZ and KSVZ models, our results exclude the axion mass heavier than 0.9 eV/c$^{2}$ and 173 eV/c$^{2}$, respectively. The derived constraints for dark matter axions below 1 keV improves over the previous results.

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