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An Improved RF Cavity Search for Halo Axions
Preprint
S. J. Asztalos ,
R. F. Bradley ,
L. Duffy ,
C. Hagmann ,
D. Kinion ,
D. M. Moltz ,
L. J Rosenberg ,
P. Sikivie ,
W. Stoeffl ,
N. S. Sullivan ,
D. B. Tanner ,
K. van Bibber ,
D. B. Yu
01 October 2003
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Abstract
The axion is a hypothetical elementary particle and cold dark matter candidate. In this RF cavity experiment, halo axions entering a resonant cavity immersed in a static magnetic field convert into microwave photons, with the resulting photons detected by a low-noise receiver. The ADMX Collaboration presents new limits on the axion-to-photon coupling and local axion dark matter halo mass density from a RF cavity axion search in the axion mass range 1.9-2.3 microeV, broadening the search range to 1.9-3.3 microeV. In addition, we report first results from an improved analysis technique.