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Search for Invisible Axion Dark Matter in the 3.3-4.2  μeV Mass Range.

C Bartram1, T Braine1, E Burns1

  • 1University of Washington, Seattle, Washington 98195, USA.

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|January 14, 2022
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Summary
This summary is machine-generated.

This study searched for axion dark matter particles. The experiment excluded a key prediction for invisible axion dark matter, specifically the Kim-Shifman-Vainshtein-Zakharov model.

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Area of Science:

  • Particle Physics
  • Cosmology
  • Astrophysics

Background:

  • Dark matter constitutes a significant portion of the universe's mass.
  • Axions are a leading candidate for dark matter particles.
  • The Kim-Shifman-Vainshtein-Zakharov (KSVZ) model provides a benchmark for axion properties.

Purpose of the Study:

  • To conduct a haloscope search for axion dark matter.
  • To probe the 3.3-4.2 μeV mass range for axions.
  • To test predictions of the KSVZ model for axion-photon coupling.

Main Methods:

  • Utilized a large-volume resonant cavity haloscope.
  • Employed a strong superconducting magnet to enhance signal detection.
  • Used ultra-low noise Josephson parametric amplifiers.
  • Operated the experiment at sub-Kelvin temperatures for reduced noise.

Main Results:

  • The search excluded the axion-photon coupling predicted by the KSVZ model within the probed mass range.
  • Achieved unprecedented sensitivity in the 3.3-4.2 μeV axion mass range.
  • Verified the detection procedure using injected synthetic axion signals.

Conclusions:

  • The experimental results place constraints on the properties of invisible axion dark matter.
  • The findings challenge specific parameter spaces of the KSVZ model.
  • The employed haloscope technology demonstrates potential for future dark matter searches.