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Study of background from accidental coincidence signals in the PandaX-II experiment
- Publication Year :
- 2022
-
Abstract
- The PandaX-II experiment employed a 580kg liquid xenon detector to search for the interactions between dark matter particles and the target xenon atoms. The accidental coincidences of isolated signals result in a dangerous background which mimic the signature of the dark matter. We performed a detailed study on the accidental coincidence background in PandaX-II, including the possible origin of the isolated signals, the background level and corresponding background suppression method. With a boosted-decision-tree algorithm, the accidental coincidence background is reduced by 70% in the dark matter signal region, thus the sensitivity of dark matter search at PandaX-II is improved.<br />Comment: 20 pages, 12 figures in main text and 5 figures in the appendix. Accepted by Chinese Physics C
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.2204.11175
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/1674-1137/ac7cd8