A ferromagnetic levitated magnetometer with double-resonance mode reaches 0.7 fT magnetic resolution at 276 Hz and sets new direct limits on axionlike dark matter photon coupling g_aγ ~10^{-7} GeV^{-1} in the 40-3000 Hz band, improving prior limits by more than four orders of magnitude.
Latest Results of the OSQAR Photon Regeneration Experiment for Axion-Like Particle Search
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abstract
The OSQAR photon regeneration experiment searches for pseudoscalar and scalar axion-like particles by the method of "Light Shining Through a Wall", based on the assumption that these weakly interacting sub-eV particles couple to two photons to give rise to quantum oscillations with optical photons in strong magnetic field. No excess of events has been observed, which constrains the di-photon coupling strength of both pseudoscalar and scalar particles down to $5.7 \cdot 10^{-8}$ GeV$^{-1}$ in the massless limit. This result is the most stringent constraint on the di-photon coupling strength ever achieved in laboratory experiments.
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UNVERDICTED 2representative citing papers
The thesis presents a new 3-to-2 freezeout mechanism, bound-state effects on searches, a new axion interferometric search, reionization assessments, 21-cm constraints, and the DarkHistory code for ionization and thermal histories.
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Ferromagnetic broadband sensing of axionlike dark matter
A ferromagnetic levitated magnetometer with double-resonance mode reaches 0.7 fT magnetic resolution at 276 Hz and sets new direct limits on axionlike dark matter photon coupling g_aγ ~10^{-7} GeV^{-1} in the 40-3000 Hz band, improving prior limits by more than four orders of magnitude.
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Dark Matter Energy Deposition and Production from the Table-Top to the Cosmos
The thesis presents a new 3-to-2 freezeout mechanism, bound-state effects on searches, a new axion interferometric search, reionization assessments, 21-cm constraints, and the DarkHistory code for ionization and thermal histories.