Results from a High-Sensitivity Search for Cosmic Axions

C. Hagmann , D. Kinion , W. Stoeffl , K. van Bibber , E. Daw , H. Peng , Leslie J Rosenberg , J. Laveigne

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P. Sikivie N. Sullivan D. Tanner F. Nezrick Michael S. Turner D. Moltz J. Powell N. Golubev

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keywords axionshalohigh-sensitivityresultssearchaxionconfidenceconversion

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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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Results from a High-Sensitivity Search for Cosmic Axions

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