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Search for Invisible Axion Dark Matter with the Axion Dark Matter Experiment

2018; American Physical Society; Volume: 120; Issue: 15 Linguagem: Inglês

10.1103/physrevlett.120.151301

1092-0145

N. Du, Nicholas Force, Rakshya Khatiwada, Erik W. Lentz, R. Ottens, L. J Rosenberg, G. Rybka, G. Carosi, N. Woollett, D. Bowring, A. Chou, A. Sonnenschein, W. C. Wester, C. Boutan, N. S. Oblath, Richard F. Bradley, E. J. Daw, Akash Dixit, John Clarke, S. R. O’Kelley, N. Crisosto, J. R. Gleason, S. Jois, P. Sikivie, I. Stern, N. S. Sullivan, D. B. Tanner, G. C. Hilton,

Atomic and Subatomic Physics Research

This Letter reports the results from a haloscope search for dark matter axions with masses between 2.66 and 2.81 μeV. The search excludes the range of axion-photon couplings predicted by plausible models of the invisible axion. This unprecedented sensitivity is achieved by operating a large-volume haloscope at subkelvin temperatures, thereby reducing thermal noise as well as the excess noise from the ultralow-noise superconducting quantum interference device amplifier used for the signal power readout. Ongoing searches will provide nearly definitive tests of the invisible axion model over a wide range of axion masses.