CRESST暗物质搜寻-现状与展望
The CRESST Dark Matter Search - Status and Perspectives
摘要:
在过去的几年里,无论是从理论还是实验上,对暗物质粒子的研究都扩展到了低质量区域。我们讨论了2013年使用单探测器TUM 40获得的数据的结果。该探测器配备了一个新的升级保持方案,以有效地否决由表面α衰变引起的背景。这一否决,0.6 keV的低阈值和CaWO $_4$靶晶体前所未有的背景水平使TUM 40成为CRESST-II第2阶段(2013年7月至2015年8月)中整体性能最好的探测器。低阈值分析允许研究轻暗物质粒子(<3GeV/c $^2$),以前无法进行其他直接检测实验。
英文摘要:
In the past years the spotlight of the search for dark matter particles widened to the low mass region, both from theoretical and experimental side. We discuss results from data obtained in 2013 with a single detector TUM40. This detector is equipped with a new upgraded holding scheme to efficiently veto backgrounds induced by surface alpha decays. This veto, the low threshold of 0.6keV and an unprecedented background level for CaWO$_4$ target crystals render TUM40 the detector with the best overall performance of CRESST-II phase 2 (July 2013 - August 2015). A low-threshold analysis allowed to investigate light dark matter particles (<3GeV/c$^2$), previously not accessible for other direct detection experiments.
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