使用CAPP18T万事镜进行扩展的Axion暗物质搜索
Byeongsu Yang1, Hojin Yoon2, Moohyun Ahn1
1Department of Physics and Astronomy, Seoul National University, Seoul 08826, Korea.
Physical review letters
|September 8, 2023
概括
在CAPP18T实验中,使用先进的超导磁体技术,寻找axion暗物质. 没有发现动力信号,这为暗物质搜索的动力-光子合设置了新的限制.
科学领域:
- 粒子物理学 粒子物理学
- 宇宙学的宇宙学是什么?
- 天体物理学 天体物理学
背景情况:
- 暗物质构成了宇宙质量的很大一部分.
- 轴子是暗物质的主要候选粒子.
- 镜实验旨在通过它们在共振腔内转化为光子来检测轴子.
研究的目的:
- 通过使用CAPP18T光镜进行扩展的搜索axion暗物质.
- 为了建立对轴子-光子-光子合常数的新上限.
- 为了证明先进技术对于高质量暗物质的能力.
主要方法:
- 使用了配备高温超导磁铁和约瑟夫森参数转换器的CAPP18T光镜.
- 在磁灭后重建了探测器系统,优化了阻抗匹配和空洞调整.
- 扫描了 4.8077 到 4.8181 GHz 的频率范围,总系统噪声温度为 ~ 0.6 K.
- 保持空腔-天线合在β2以提高扫描速度.
主要成果:
- 在扫描的频率范围内没有观察到axion暗物质的显著特征.
- 确定了19883~19926μeV的轴子质量对轴子-光子-光子合 (g_{aγγ}) 的最佳上限.
- 在90%的置信级别下,已达到0.7×钱柜g_{aγγ}^{KSVZ}钱柜或1.9×钱柜g_{aγγ}^{DFSZ}钱柜的界限.
结论:
- CAPP18T实验成功地进行了对高质量暗物质轴子的可靠搜索.
- 采用的创新技术显示出未来超越基准模型的暗物质搜索的潜力.
- 这些结果有助于限制轴的特性和暗物质的性质.
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