用3^He缓冲气体搜索CAST太阳轴子：关闭热暗物质间隙
CAST solar axion search with 3^He buffer gas: Closing the hot dark matter gap
摘要：
欧洲核子研究中心（CERN）的轴子太阳望远镜（CAST）已经完成了用3^He缓冲气体对太阳轴子的探测，探测范围为0.64 eV < m_a <1.17 eV。由于当磁体指向太阳时没有多余的X射线，我们设定了一个典型的轴子-光子耦合上限，g_ag < 3.3 x 10^{-10} GeV^{-1}，CL为95%，具体值取决于压力设置。未来的直接太阳轴子搜索将集中在增加对较小g_a值的灵敏度上，例如通过目前讨论的下一代日光镜IAO。
英文摘要：
The CERN Axion Solar Telescope (CAST) has finished its search for solar axions with 3^He buffer gas, covering the search range 0.64 eV < m_a <1.17 eV. This closes the gap to the cosmological hot dark matter limit and actually overlaps with it. From the absence of excess X-rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g_ag < 3.3 x 10^{-10} GeV^{-1} at 95% CL, with the exact value depending on the pressure setting. Future direct solar axion searches will focus on increasing the sensitivity to smaller values of g_a, for example by the currently discussed next generation helioscope IAXO.
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