AI Article Synopsis
- Researchers are investigating how resonant dark matter can convert into low-frequency radio waves in Earth's ionosphere, particularly in the mass range of about 10^{-9} to 10^{-8} eV.
- The typical methods for calculating this conversion are inadequate due to the nonrelativistic nature of dark matter, so a new approach involving a second-order boundary-value problem is applied.
- Using a small dipole antenna to detect these radio waves could increase sensitivity to dark photon and axionlike particle dark matter, offering a new avenue for exploring uncharted regions of dark matter physics.
Article Abstract
We consider resonant wavelike dark matter conversion into low-frequency radio waves in the Earth's ionosphere. Resonant conversion occurs when the dark matter mass and the plasma frequency coincide, defining a range m_{DM}∼10^{-9}-10^{-8} eV where this approach is best suited. Owing to the nonrelativistic nature of dark matter and the typical variational scale of the Earth's ionosphere, the standard linearized approach to computing dark matter conversion is not suitable. We therefore solve a second-order boundary-value problem, effectively framing the ionosphere as a driven cavity filled with a positionally varying plasma. An electrically small dipole antenna targeting the generated radio waves can be orders of magnitude more sensitive to dark photon and axionlike particle dark matter in the relevant mass range. This Letter opens up a promising way of testing hitherto unexplored parameter space that could be further improved with a dedicated instrument.
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| http://dx.doi.org/10.1103/PhysRevLett.133.251001 | DOI Listing |
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