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

S.K. Liu , Q. Yue , K.J. Kang , J.P. Cheng , H.T. Wong , Y.J. Li , H.B. Li , S.T. Lin

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J.P. Chang J.H. Chen N. Chen Q.H. Chen Y.H. Chen Z. Deng Q. Du H. Gong H.J. He Q.J. He H.X. Huang H. Jiang J.M. Li J. Li X. Li X.Q. Li X.Y. Li Y.L. Li F.K. Lin L.C. L\"u H. Ma J.L. Ma S.J. Mao J.Q. Qin J. Ren X.C. Ruan V. Sharma M.B. Shen L. Singh M.K. Singh A.K. Soma J. Su C.J. Tang J.M. Wang L. Wang Q. Wang S.Y. Wu Y.C. Wu Z.Z. Xianyu R.Q. Xiao H.Y. Xing F.Z. Xu Y. Xu X.J. Xu T. Xue C.W. Yang L.T. Yang S.W. Yang N. Yi C.X. Yu H. Yu X.Z. Yu X.H. Zeng Z. Zeng L. Zhang Y.H. Zhang M.G. Zhao W. Zhao Z.Y. Zhou J.J. Zhu W.B. Zhu X.Z. Zhu Z.H. Zhu

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classification ✦ hep-ex hep-phphysics.ins-det

keywords axionsresultsaxioncdex-1chinaconstraintsdarkdata

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

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