通过CDEX-10实验在中国的地下实验室进行异国情调的暗物质搜索

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通过CDEX-10实验在中国的地下实验室进行异国情调的暗物质搜索

Exotic Dark Matter Search with CDEX-10 Experiment at China's Jinping Underground Laboratory

论文作者

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

论文摘要

使用205千克$ \ cdot $ DAY数据进行了从P型点接触CDEX-10实验的Germanium检测器，在中国地下实验室中搜索了Sub-GEV质量范围的外来暗物质（DM）。新的低质量暗物质搜索通道，中性当前的费米子DM吸收（$χ+a \rightArrowν+a $）和DM-Nucleus 3 $ \ rightArrow $ 2散射（$χ+χ+χ+A \ rightArrow ϕ+a $），已用160 evee的能量分析。找不到明显的信号。因此，在Sub-GEV DM质量区域的两个模型设置了DM核子相互作用横截面的新限制。 Fermionic DM吸收的横截面限制设置为$ \ rm 2.5 \ times 10^{ - 46} cm^2 $（90 \％c.l.），DM质量为10 mev/c $^2 $。对于DM-Nucleus 3 $ \ rightarrow $ 2散射方案，限制分别扩展到5 MEV/C $^2 $和14 MEV/C $^2 $的DM质量，分别为无质量的深色光子和绑定的DM最终状态。

A search for exotic dark matter (DM) in the sub-GeV mass range has been conducted using 205 kg$\cdot$day data taken from a p-type point contact germanium detector of CDEX-10 experiment at China Jinping underground laboratory. New low-mass dark matter searching channels, neutral current fermionic DM absorption ($χ+A\rightarrow ν+A$) and DM-nucleus 3$\rightarrow$2 scattering ($χ+χ+A\rightarrow ϕ+A$), have been analyzed with an energy threshold of 160 eVee. No significant signal was found. Thus new limits on the DM-nucleon interaction cross section are set for both models at sub-GeV DM mass region. A cross section limit for the fermionic DM absorption is set to be $\rm 2.5\times 10^{-46} cm^2$(90\% C.L.) at DM mass of 10 MeV/c$^2$. For the DM-nucleus 3$\rightarrow$2 scattering scenario, limits are extended to DM mass of 5 MeV/c$^2$ and 14 MeV/c$^2$ for the massless dark photon and bound DM final state, respectively.

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