Searching for Invisible Axion Dark Matter with an 18 T Magnet Haloscope

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We report the first search results for axion dark matter using an 18 T high-temperature superconducting magnet haloscope. The scan frequency ranges from 4.7789 to 4.8094 GHz. No significant signal consistent with the Galactic halo dark matter axion is observed. The results set the best upper bound of axion-photonphoton coupling (ga..) in the mass ranges of 19.764 to 19.771 mu eV (19.863 to 19.890 mu eV) at 1.5 x jgKSVZ a.. j (1.7 x jgKSVZ a.. j), and 19.772 to 19.863 mu eV at 2.7 x jgKSVZ a.. j with 90% confidence level, respectively. This remarkable sensitivity in the high mass region of dark matter axion is achieved by using the strongest magnetic field among the existing haloscope experiments and realizing a low-noise amplification of microwave signals using a Josephson parametric converter.
Publisher
AMER PHYSICAL SOC
Issue Date
2022-06
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW LETTERS, v.128, no.24

ISSN
0031-9007
DOI
10.1103/PhysRevLett.128.241805
URI
http://hdl.handle.net/10203/297341
Appears in Collection
PH-Journal Papers(저널논문)
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