CAST-RADES晕圈镜在34.67 $μ$ eV处寻找轴子的第一批结果
First results of the CAST-RADES haloscope search for axions at 34.67 $μ$eV
摘要：
我们目前的遗迹轴子暗物质探测装置（RADES），这是欧洲核子研究中心轴子太阳望远镜（CAST）的一部分，在34.67 $μ$ eV质量范围内寻找轴子暗物质的检测器的结果。利用这种滤波器状的晕圈结构，首次实现了一个由5个子腔组成的射频腔在CAST偶极磁体内部的物理测量。在34.6738 $μ$ eV < $m_a$ < 34.6771 $μ$ eV的质量范围内，设定g $_{aγ}\gtrsim 4\times10^{-13} \text{GeV}^{-1}$的轴子-光子耦合常数的具有95%可信度水平的排除极限。这构成了一个显着的改进，目前最强的限制设置的CAST在这个质量，并在同一时间的一个最敏感的直接搜索的轴子暗物质候选人以上的质量为25 $μ$ eV。结果还表明，在这项工作中，使用类似的相干谐振腔，探索更广泛的质量范围周围的值由CAST-RADES探测的可行性。
英文摘要：
We present results of the Relic Axion Dark-Matter Exploratory Setup (RADES), a detector which is part of the CERN Axion Solar Telescope (CAST), searching for axion dark matter in the 34.67$μ$eV mass range. A radio frequency cavity consisting of 5 sub-cavities coupled by inductive irises took physics data inside the CAST dipole magnet for the first time using this filter-like haloscope geometry. An exclusion limit with a 95% credibility level on the axion-photon coupling constant of g$_{aγ}\gtrsim 4\times10^{-13} \text{GeV}^{-1}$ over a mass range of 34.6738 $μ$eV < $m_a$ < 34.6771 $μ$eV is set. This constitutes a significant improvement over the current strongest limit set by CAST at this mass and is at the same time one of the most sensitive direct searches for an axion dark matter candidate above the mass of 25 $μ$eV. The results also demonstrate the feasibility of exploring a wider mass range around the value probed by CAST-RADES in this work using similar coherent resonant cavities.
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