Detecting Light Boson Dark Matter through Conversion into MagnonDetecting Light Boson Dark Matter through Conversion into Magnon

Abstract:
Light boson dark matter such as axion or hidden photon can be resonantly
converted into a magnon in a magnetic insulator under the magnetic field,
which can be detected experimentally. We provide a quantum mechanical
formulation for the magnon event rate and show that the result is
consistent with that obtained by a classical calculation. Besides, it is
pointed out that the experimental setup of the QUAX proposal for the
axion detection also works as a detector of hidden photon dark matter.
It has good sensitivity in the mass range around 1 meV, which is beyond
astrophysical constraints. This talk is based on my paper arXiv: 2001.10666.

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