利用剖面似然比法从CDEX-1B实验得到太阳轴子和玻色子暗物质限制的改进
高能物理 - 实验
2021-04-27 v2 高能物理 - 唯象学
仪器与探测器
摘要
我们利用CDEX-1B实验737.1 kg·天的曝光数据，给出了对太阳轴子及更一般的玻色子暗物质粒子耦合的改进约束。CDEX-1B实验位于中国锦屏地下实验室，主要目标是使用p型点接触锗探测器直接探测弱相互作用大质量粒子。我们采用剖面似然比法在存在本底的情况下分析数据。实验达到了160 eV的能量阈值，远优于曝光量为335.6 kg·天的CDEX-1A的475 eV。这显著提升了锗探测器对0.8 keV以下玻色子暗物质的灵敏度。我们还给出了由康普顿、轫致辐射、原子复合和去激发通道得到的耦合限制，以及由Fe M1跃迁在90%置信水平下得到的。
引用
@article{arxiv.1911.03085,
title = {Improved limits on solar axions and bosonic dark matter from the CDEX-1B experiment using the profile likelihood ratio method},
author = {Y. Wang and Q. Yue and S. K. Liu and K. J. Kang and Y. J. Li and H. P. An and J. P. Chang and J. H. Chen and Y. H. Chen and J. P. Cheng and W. H. Dai and Z. Deng and X. P. Geng and H. Gong and P. Gu and X. Y. Guo and H. T. He and L. He and S. M. He and J. W. Hu and H. X. Huang and T. C. Huang and L. P. Jia and H. B. Li and H. Li and M. X. Li and J. M. Li and J. Li and X. Li and X. Q. Li and Y. L. Li and B. Liao and F. K. Lin and S. T. Lin and Y. D. Liu and Y. Y. Liu and Z. Z. Liu and H. Ma and Q. Y. Nie and J. H. Ning and H. Pan and N. C. Qi and C. K. Qiao and J. Ren and X. C. Ruan and V. Sharma and Z. She and L. Singh and M. K. Singh and T. X. Sun and C. J. Tang and W. Y. Tang and Y. Tian and G. F. Wang and L. Wang and Q. Wang and Z. Wang and H. T. Wong and S. Y. Wu and Y. C. Wu and H. Y. Xing and Y. Xu and T. Xue and Y. L. Yan and L. T. Yang and N. Yi and C. X. Yu and H. J. Yu and J. F. Yue and X. H. Zeng and M. Zeng and Z. Zeng and B. T. Zhang and F. S. Zhang and L. Zhang and Z. Y. Zhang and M. G. Zhao and J. F. Zhou and Z. Y. Zhou and J. J. Zhu},
journal= {arXiv preprint arXiv:1911.03085},
year = {2021}
}
备注
version accepted by PRD, 9 pages, 11 figures