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arXiv · 2205.05574

First Results from the Taiwan Axion Search Experiment with Haloscope at 19.6 $\mu$eV

Hsin Chang·Jing-Yang Chang·Yi-Chieh Chang·Yu-Han Chang·Yuan-Hann Chang·Chien-Han Chen·Ching-Fang Chen·Kuan-Yu Chen·Yung-Fu Chen·Wei-Yuan Chiang·Wei-Chen Chien·Hien Thi Doan·Wei-Cheng Hung·Watson Kuo·Shou-Bai Lai·Han-Wen Liu·Min-Wei OuYang·Ping-I Wu·Shin-Shan Yu
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Abstract

This Letter reports on the first results from the Taiwan Axion Search Experiment with Haloscope, a search for axions using a microwave cavity at frequencies between 4.70750 and 4.79815 GHz. Apart from the non-axion signals, no candidates with a significance more than 3.355 were found. The experiment excludes models with the axion-two-photon coupling $\left|g_{a\gamma\gamma}\right|\gtrsim 8.2\times 10^{-14}$ GeV$^{-1}$, a factor of eleven above the benchmark KSVZ model, reaching a sensitivity three orders of magnitude better than any existing limits in the mass range 19.4687 < $m_a$ < 19.8436 $\mu$eV. It is also the first time that a haloscope-type experiment places constraints on $g_{a\gamma\gamma}$ in this mass region.

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Hsin Chang, Jing-Yang Chang, Yi-Chieh Chang, Yu-Han Chang, Yuan-Hann Chang, Chien-Han Chen, Ching-Fang Chen, Kuan-Yu Chen, Yung-Fu Chen, Wei-Yuan Chiang, Wei-Chen Chien, Hien Thi Doan, Wei-Cheng Hung, Watson Kuo, Shou-Bai Lai, Han-Wen Liu, Min-Wei OuYang, Ping-I Wu, Shin-Shan Yu. 2022-05-11. First Results from the Taiwan Axion Search Experiment with Haloscope at 19.6 $\mu$eV. https://doi.org/10.1103/physrevlett.129.111802

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