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Near-Quantum-Noise Axion Dark Matter Search at CAPP around 9.5 $\mu$eV

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arxiv 2207.13597 v1 pith:PNJSAWXW submitted 2022-07-27 hep-ex physics.ins-det

Jinsu Kim , Ohjoon Kwon , Çağlar Kutlu , Woohyun Chung , Andrei Matlashov , Sergey Uchaikin , Arjan Ferdinand van Loo , Yasunobu Nakamura
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Seonjeong Oh HeeSu Byun Danho Ahn Yannis K. Semertzidis
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classification hep-exphysics.ins-det
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abstract

We report the results of an axion dark matter search over an axion mass range of 9.39-9.51 ${\mu}$eV. A flux-driven Josephson parametric amplifier (JPA) was added to the cryogenic receiver chain. A system noise temperature of as low as 200 mK was achieved, which is the lowest recorded noise among published axion cavity experiments with phase-insensitive JPA operation. In addition, we developed a two-stage scanning method which boosted the scan speed by 26%. As a result, a range of two-photon coupling in a plausible model for the QCD axion was excluded with an order of magnitude higher in sensitivity than existing limits.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Axiverse Lampposts

    hep-ph 2026-02 conditional novelty 6.0 of 10

    In a hierarchical multi-axion theory with random couplings, axion field ranges shrink with 1/sqrt(N), generic axion–SM couplings are suppressed, but the QCD axion's coupling is unsuppressed.

  2. Probing the axion-electron coupling at cavity experiments

    hep-ph 2025-07 conditional novelty 6.0 of 10

    Cavity walls radiate microwave photons when axion dark matter generates a chiral magnetic current at the conductor surface, turning existing haloscope data into a bound on the axion-electron coupling g_ae ≲ 10^-5.

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