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Search for Light Weakly-Interacting-Massive-Particle Dark Matter by Annual Modulation Analysis with a Point-Contact Germanium Detector at the China Jinping Underground Laboratory
- Source :
- Phys. Rev. Lett. 123, 221301 (2019)
- Publication Year :
- 2019
-
Abstract
- We present results on light weakly interacting massive particle (WIMP) searches with annual modulation (AM) analysis on data from a 1-kg mass $p$-type point-contact germanium detector of the CDEX-1B experiment at the China Jinping Underground Laboratory. Datasets with a total live time of 3.2 yr within a 4.2 yr span are analyzed with analysis threshold of 250 eVee. Limits on WIMP-nucleus (${\chi}$-$N$) spin-independent cross sections as function of WIMP mass ($m_{\chi}$) at 90\% confidence level (C.L.) are derived using the dark matter halo model. Within the context of the standard halo model, the 90\% C.L. allowed regions implied by the DAMA/LIBRA and CoGeNT AM-based analysis are excluded at $>$99.99\% and 98\% C.L., respectively. These results correspond to the best sensitivity at $m_{\chi}$$<$6$~{\rm GeV}/c^2$ among WIMP AM measurements to date.<br />Comment: 5 pages, 4 figures
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 123, 221301 (2019)
- Publication Type :
- Report
- Accession number :
- edsarx.1904.12889
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.123.221301