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Search for ultralight axion dark matter in a side-band analysis of a 199Hg free-spin precession signal

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arxiv 2212.02403 v2 pith:4W5SCXML submitted 2022-12-02 nucl-ex hep-exhep-ph

C. Abel , N. J. Ayres , G. Ban , G. Bison , K. Bodek , V. Bondar , E. Chanel , C. B. Crawford
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M. Daum B. Dechenaux S. Emmenegger P. Flaux W. C. Griffith P. G. Harris Y. Kermaidic K. Kirch S. Komposch P. A. Koss J. Krempel B. Lauss T. Lefort O. Naviliat-Cuncic P. Mohanmurthy D. Pais F. M. Piegsa G. Pignol M. Rawlik D. Ries S. Roccia D. Rozpedzik P. Schmidt-Wellenburg N. Severijns Y. V. Stadnik J. A. Thorne A. Weis E. Wursten J. Zejma G. Zsigmond
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classification nucl-exhep-exhep-ph
keywords fieldaxionoscillatingtextrmcouplingdarkearthlesssim
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abstract

Ultra-low-mass axions are a viable dark matter candidate and may form a coherently oscillating classical field. Nuclear spins in experiments on Earth might couple to this oscillating axion dark-matter field, when propagating on Earth's trajectory through our Galaxy. This spin coupling resembles an oscillating pseudo-magnetic field which modulates the spin precession of nuclear spins. Here we report on the null result of a demonstration experiment searching for a frequency modulation of the free spin-precession signal of \magHg in a \SI{1}{\micro\tesla} magnetic field. Our search covers the axion mass range $10^{-16}~\textrm{eV} \lesssim m_a \lesssim 10^{-13}~\textrm{eV}$ and achieves a peak sensitivity to the axion-nucleon coupling of $g_{aNN} \approx 3.5 \times 10^{-6}~\textrm{GeV}^{-1}$.

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  1. Detecting the Coupling of Axion Dark Matter to Neutron Spins at Spallation Sources via Rabi Oscillation

    hep-ph 2024-12 conditional novelty 6.0 of 10

    A neutron-beam Rabi oscillation setup with double Stern-Gerlach spin selection could reach fa/Cn around 1.3e7 GeV and probe axion dark matter masses from 3e-13 to 1e-10 eV.

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