Search for Invisible Axion Dark Matter in the 3. 3–4. 2 μeV Mass Range

Key Points

• The aim is to find axion dark matter within a specific mass range and test related models.
• Conducted a haloscope search using a large-volume cavity and superconducting magnet.
• Employed ultra-low noise Josephson parametric amplifier at sub-Kelvin temperatures.
• Validated detection methods by injecting and detecting blind synthetic axion signals.
• The search successfully excluded the axion-photon coupling predicted by the Kim-Shifman-Vainshtein-Zakharov model.
• Achieved high sensitivity for detecting axion dark matter in the 3.3–4.2 μeV mass range.
• Confirmed the efficacy of detection procedures through synthetic signal testing.