Question AXION GLUON MATTER AS DARK MATTER

[Harry Costas]

There must be a reason why they are investigating AXIONs.

[Submitted on 27 May 2025]

High-Frequency Gravitational Waves on BREAD​

Rodolfo Capdevilla, Roni Harnik, Taegyun Kim, Tom Krokotsch

The use of light axion dark matter experiments as high-frequency gravitational wave (HFGW) detectors has garnered increasing attention in recent years. We explore the capabilities of the Broadband Reflector Experiment for Axion Detection (BREAD) in probing the GW parameter space and study the directional dependence of its coverage. This detector can investigate frequencies ranging from 0.05 to 200 THz. We find that employing single photon detectors BREAD is sensitive to GWs with characteristic strains as low as 10−21 at 0.1 THz and 10−25 at 200 THz with a year exposure time, making it competitive with other proposals operating at similar frequencies.

 

[Harry Costas]

We are entering real research into Axion matter.

[Submitted on 29 May 2025]

Physics beyond the Standard Model with the DSA-2000​

Kim V. Berghaus, Yufeng Du, Vincent S. H. Lee, Anirudh Prabhu, Robert Reischke, Liam Connor, Kathryn M. Zurek

The upcoming Deep Synoptic Array 2000 (DSA-2000) will map the radio sky at 0.7−2 GHz (2.9−8.3μeV) with unprecedented sensitivity. This will enable searches for dark matter and other physics beyond the Standard Model, of which we study four cases: axions, dark photons, dark matter subhalos and neutrino masses. We forecast DSA-2000's potential to detect axions through two mechanisms in neutron star magnetospheres: photon conversion of axion dark matter and radio emission from axion clouds, developing the first analytical treatment of the latter. We also forecast DSA-2000's sensitivity to discover kinetically mixed dark photons from black hole superradiance, constrain dark matter substructure and fifth forces through pulsar timing, and improve cosmological neutrino mass inference through fast radio burst dispersion measurements. Our analysis indicates that in its planned five year run the DSA-2000 could reach sensitivity to QCD axion parameters, improve current limits on compact dark matter by an order of magnitude, and enhance cosmological weak lensing neutrino mass constraints by a factor of three.