Improved limits on solar axions and bosonic dark matter from the CDEX-1B experiment using profile likelihood ratio method

Wang Y.,Yue Q.,Liu S. K.,Kang K. J.,Li Y. J.,An H. P.,Chang J. P., Chen J. H.,Chen Y. H., Cheng J. P.,Dai W. H.,Deng Z., Geng X. P., Gong H.,Gu P.,Guo X. Y., He H. T.,He L.,He S. M., Hu J. W.,Huang H. X.,Huang T. C., Jia L. P.,Li H. B.,Li H.,Li M. X.,Li J. M.,Li J.,Li X.,Li X. Q.,Li Y. L., Liao B., Lin F. K., Lin S. T.,Liu Y. D.,Liu Y. Y.,Liu Z. Z., Ma H., Nie Q. Y., Ning J. H.,Pan H.,Qi N. C.,Qiao C. K.,Ren J., Ruan X. C.,Sharma V., She Z.,Singh L.,Singh M. K.,Sun T. X., Tang C. J., Tang W. Y.,Tian Y., Wang G. F.,Wang L.,Wang Q.,Wang Z.,Wong H. T.,Wu S. Y.,Wu Y. C.,Xing H. Y.,Xu Y., Xue T., Yan Y. L.,Yang L. T., Yi N.,Yu C. X.,Yu H. J., Yue J. F., Zeng X. H.,Zeng M.,Zeng Z., Zhang B. T.,Zhang F. S., Zhang L., Zhang Z. Y., Zhao M. G., Zhou J. F.,Zhou Z. Y.,Zhu J. J.

Physical Review D（2020）

引用 27|浏览99

暂无评分

摘要

We present improved constraints on couplings of solar axions and more generic bosonic dark matter particles using 737.1 kg-days of data from the CDEX-1B experiment. The CDEX-1B experiment, located at the China Jinping Underground Laboratory, primarily aims at the direct detection of WIMPs using a p-type point-contact germanium detector. We develop the profile likelihood ratio method for analysis of data in the presence of backgrounds. The background modeling is compatible with the data and no excess signals are observed. An energy threshold of 160 eV was achieved. This significantly improve the sensitivity for the bosonic dark matter below 0.8 keV. Limits are also placed on the coupling $g_{Ae} < 2.26 \times 10^{-11}$ from Compton, bremsstrahlung, atomic-recombination and de-excitation channels and $g^{eff}_{AN} \times g_{Ae} < 4.14 \times 10^{-17}$ from a $^{57}$Fe M1 transition at 90\% confidence level. All the constrains improve over our previous results.

查看译文

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要