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

hep-ex

/ Authors

N. Du, N. Force, R. Khatiwada, E. Lentz, R. Ottens, L. J Rosenberg, G. Rybka, G. Carosi, N. Woolett, D. Bowring

and 18 more authors

A. S. Chou, A. Sonnenschein, W. Wester, C. Boutan, N. S. Oblath, R. Bradley, E. J. Daw, A. V. Dixit, J. Clarke, S. R. O'Kelley, N. Crisosto, J. R. Gleason

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

hep-ex

/ Authors

N. Du, N. Force, R. Khatiwada, E. Lentz, R. Ottens, L. J Rosenberg, G. Rybka, G. Carosi, N. Woolett, D. Bowring

and 18 more authors

A. S. Chou, A. Sonnenschein, W. Wester, C. Boutan, N. S. Oblath, R. Bradley, E. J. Daw, A. V. Dixit, J. Clarke, S. R. O'Kelley, N. Crisosto, J. R. Gleason

, S. Jois

/ Abstract

This Letter reports results from a haloscope search for dark matter axions with masses between 2.66 and 2.81 $μ$eV. 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 sub-kelvin temperatures, thereby reducing thermal noise as well as the excess noise from the ultra-low-noise SQUID 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.