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.

11 text pages, 4 figures (figures 2 and 3 combined), to be published in Physical Review Letters

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• Maximum-Likelihood Comparisons of Tully-Fisher and Redshift Data: Constraints on Omega and Biasing
• The Local Halo Density
• The velocity peaks in the cold dark matter spectrum on Earth
• First results from a second generation galactic axion experiment

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