paper

Search for invisible axion dark matter of mass meV with the QUAX-- experiment

arXiv:2012.09498 · doi:10.1103/PhysRevD.103.102004

Abstract

A haloscope of the QUAX-- experiment composed of an oxygen-free high thermal conductivity-Cu cavity inside an 8.1 T magnet and cooled to mK is put in operation for the search of galactic axion with mass . The power emitted by the resonant cavity is amplified with a Josephson parametric amplifier whose noise fluctuations are at the standard quantum limit. With the data collected in about 1 h at the cavity frequency GHz, the experiment reaches the sensitivity necessary for the detection of galactic QCD-axion, setting the confidence level limit to the axion-photon coupling GeV.

7 pages, 6 figures. Analysis method changed. The result is almost left unchanged. Consequently, text has been revised in the Analysis section. Added references. Added equations (2), (4), (5)

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