Chang Hsin, Chang Jing-Yang, Chang Yi-Chieh, Chang Yu-Han, Chang Yuan-Hann, Chen Chien-Han, Chen Ching-Fang, Chen Kuan-Yu, Chen Yung-Fu, Chiang Wei-Yuan, Chien Wei-Chen, Doan Hien Thi, Hung Wei-Cheng, Kuo Watson, Lai Shou-Bai, Liu Han-Wen, OuYang Min-Wei, Wu Ping-I, Yu Shin-Shan
Department of Physics, National Central University, Taoyuan City 320317, Taiwan.
National Synchrotron Radiation Research Center, Hsinchu 300092, Taiwan.
Phys Rev Lett. 2022 Sep 9;129(11):111802. doi: 10.1103/PhysRevLett.129.111802.
This Letter reports on the first results from the Taiwan Axion Search Experiment with a Haloscope, a search for axions using a microwave cavity at frequencies between 4.707 50 and 4.798 15 GHz. Apart from the nonaxion signals, no candidates with a significance of more than 3.355 were found. The experiment excludes models with the axion-two-photon coupling |g_{aγγ}|≳8.1×10^{-14} GeV^{-1}, a factor of eleven above the benchmark Kim-Shifman-Vainshtein-Zakharov model, in the mass range 19.4687<m_{a}<19.8436 μeV. It is also the first time that a haloscope experiment places constraints on g_{aγγ} in the mass region of 19.4687<m_{a}<19.7639 μeV, reaching a sensitivity 3 orders of magnitude better than the limits obtained by nonhaloscope experiments.
本信函报道了台湾轴子搜索实验（使用谐振腔探测器）的首批结果，该实验利用一个微波腔在4.707 50至4.798 15吉赫兹的频率范围内搜索轴子。除了非轴子信号外，未发现显著性超过3.355的候选信号。该实验排除了轴子 - 双光子耦合|g_{aγγ}|≳8.1×10^{-14} GeV^{-1}的模型，在质量范围19.4687<m_{a}<19.8436 μeV内，比基准金 - 希夫曼 - 瓦因施泰因 - 扎哈罗夫模型高出11倍。这也是首次有谐振腔探测器实验在19.4687<m_{a}<19.7639 μeV的质量区域对g_{aγγ}施加限制，其灵敏度比非谐振腔探测器实验获得的极限提高了3个数量级。
