Detecting dark blobs
Detecting dark blobs
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DOI：
10.1103/physrevd.98.115020
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发表时间：
2018-07
影响因子：
5
通讯作者：
D. Grabowska;Tom Melia;S. Rajendran
中科院分区：
文献类型：
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作者：
D. Grabowska;Tom Melia;S. Rajendran
目前的暗物质探测策略是基于假设暗物质是一种非相互作用粒子的气体，具有相当大的数量密度。如果在黑暗区域内存在显著的自我相互作用，这幅图就会发生戏剧性的变化，可能导致暗物质粒子合并成大的复合斑点。这些斑点的低数量密度需要新的探测器策略。我们研究了这种情况下的宇宙学、天体物理学和直接探测边界，并确定了实验可获得的参数空间。大复合状态和标准模型之间增强的相互作用允许使用现有的实验技术搜索这样的复合团。这包括MACRO， XENON和LUX的闪烁检测，CDMS等量热计的热量检测，LIGO和AGIS等引力波探测器的加速度和应变检测，以及CASPEr的自旋进动检测。这些搜索利用了这样一个事实，即暗物质的凌日速度约为220公里/秒，与相对论和地面噪声源分离得很好。它们可以通过修改数据分析协议或相对简单地调整这些实验的操作条件来搜索。
Current dark matter detection strategies are based on the assumption that the dark matter is a gas of non-interacting particles with a reasonably large number density. This picture is dramatically altered if there are significant self interactions within the dark sector, potentially resulting in the coalescence of dark matter particles into large composite blobs. The low number density of these blobs necessitates new detector strategies. We study cosmological, astrophysical and direct detection bounds on this scenario and identify experimentally accessible parameter space. The enhanced interaction between large composite states and the standard model allows searches for such composite blobs using existing experimental techniques. This includes the detection of scintillation in MACRO, XENON and LUX, heat in calorimeters such as CDMS, acceleration and strain in gravitational wave detectors such as LIGO and AGIS, and spin precession in CASPEr. These searches leverage the fact that the transit of the dark matter occurs at a speed ~220 km/s, well separated from relativistic and terrestrial sources of noise. They can be searched for either through modifications to the data analysis protocol or relatively straightforward adjustments to the operating conditions of these experiments.