Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DMRadio-m$^3$: A Search for the QCD Axion Below $1\,\mu$eV   The QCD axion is one of the most compelling candidates to explain the dark
matter abundance of the universe. With its extremely small mass ($\ll 1
\mathrm{eV}/c^2$), axion dark matter interacts as a classical field rather than
a particle. Its coupling to photons leads to a modification of Maxwell's
equations that can be measured with extremely sensitive readout circuits.
DMRadio-m$^3$ is a next-generation search for axion dark matter below $1
\mu\mathrm{eV}$ using a 4T static magnetic field, a coaxial inductive pickup, a
tunable LC resonator, and a DC-SQUID readout. It is designed to search for QCD
axion dark matter over the range $20 \mathrm{neV}\lesssim m_a c^2\lesssim
800\mathrm{neV}$ ($5\mathrm{MHz}<\nu<200\mathrm{MHz}$) with at least KSVZ
sensitivity over the full range, and DFSZ sensitivity above $m_a c^2\approx 120
\mathrm{neV}$ (30 MHz) with a 5 year scan time. In this letter, we present a
baseline design and sensitivity for DMRadio-m$^3$.

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The categories of this paper are: math
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: eess
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The categories of this paper are: nlin