NEWAGE中基于三维矢量型径迹的方向敏感暗物质搜寻
Direction-sensitive dark matter search with three-dimensional vector-type tracking in NEWAGE
AI总结：
NEWAGE实验利用三维气体微时间投影室在神冈观测站开展方向敏感暗物质搜寻，通过新伽马排除和头尾判定分析，在3.18 kg·days曝光量下未发现显著信号，并给出150 GeV/c² WIMP质量下自旋相关WIMP-质子截面25.7 pb的最严格上限。
摘要：
NEWAGE是一个方向敏感的暗物质搜寻实验，其三维径迹探测器基于气体微时间投影室。在神冈观测站进行了一次方向敏感的暗物质搜寻，总活时间为318.0天，曝光量为3.18 kg·days。本工作实现了新的伽马射线排除和头尾判定分析。方向分析未发现显著的非各向同性信号，并针对自旋相关的WIMP-质子截面导出了90%置信水平上限，在WIMP质量为150 GeV/c²时为25.7 pb。该上限是方向敏感暗物质搜寻中最严格的。
英文摘要：
NEWAGE is a direction-sensitive dark matter search experiment with a three-dimensional tracking detector based on a gaseous micro time projection chamber. A direction-sensitive dark matter search was carried out at Kamioka Observatory with a total live time of 318.0 days resulting in an exposure of 3.18 kg$\cdot$days. A new gamma-ray rejection and a head-tail determination analysis were implemented for this work. No significant non-isotropic signal from the directional analysis was found and a 90% confidence level upper limit on spin-dependent WIMP-proton cross section of 25.7 pb for WIMP mass of 150 GeV/c2 was derived. This upper limit is the most stringent in the direction-sensitive dark matter searches.
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