A NbTi inductor coupled to Nb-coated sapphire capacitor resonator achieves Q~40000 at 492 kHz and excludes hidden-photon dark matter with kinetic mixing angle ε ≳ 1.5×10^{-9} at ~2 neV from 5.14 hours of noise data.
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Exclusion Limits on Hidden-Photon Dark Matter near 2 neV from a Fixed-Frequency Superconducting Lumped-Element Resonator
A NbTi inductor coupled to Nb-coated sapphire capacitor resonator achieves Q~40000 at 492 kHz and excludes hidden-photon dark matter with kinetic mixing angle ε ≳ 1.5×10^{-9} at ~2 neV from 5.14 hours of noise data.