Journal
PHYSICAL REVIEW LETTERS
Volume 120, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.120.151301
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Funding
- U.S. Department of Energy [DE-SC0009723, DE-SC0010296, DE-FG02-96ER40956, DEAC5207NA27344, DE-C03-76SF00098]
- Fermi Research Alliance, LLC [DE-AC 02-07CH11359]
- Heising-Simons Foundation
- Lawrence Livermore National Laboratory and Pacific Northwest National Laboratory LDRD programs
- STFC [ST/I006242/1, ST/K001337/1, ST/N005716/1, ST/R000336/1, ST/N000277/1, ST/L000954/1, ST/N000080/1, ST/K000365/1, Gravitational Waves, ST/L000946/1] Funding Source: UKRI
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This Letter reports the results from a haloscope search for dark matter axions with masses between 2.66 and 2.81 mu 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 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.
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