Results from a High-Sensitivity Search for Cosmic Axions

Abstract

We report the first results of a high-sensitivity (10-23 Watt) search for light halo axions through their conversion to microwave photons. At 90 percent confidence we exclude a KSVZ axion of mass 2.9 x 10-6 eV to 3.3 x 10-6 eV as the dark matter in the halo of our Galaxy.

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