An Improved RF Cavity Search for Halo Axions

(2) National Radio Astronomy Observatory; (3) University of Florida; (4) University of California; (5) Massachusetts Institute of Technology); Berkeley; C. Hagmann (1); D. B. Tanner (3); D. B. Yu (5) ((1) Lawrence Livermore National Laboratory; D. Kinion (1); D. M. Moltz (4)

An Improved RF Cavity Search for Halo Axions

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arxiv astro-ph/0310042 v1 pith:CXUEVYDI submitted 2003-10-01 astro-ph

S. J. Asztalos (1) , R. F. Bradley (2) , L. Duffy (3) , C. Hagmann (1) , D. Kinion (1) , D. M. Moltz (4) , L. J Rosenberg (1) , P. Sikivie (3)

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W. Stoeffl (1) N. S. Sullivan (3) D. B. Tanner (3) K. van Bibber (1) D. B. Yu (5) ((1) Lawrence Livermore National Laboratory (2) National Radio Astronomy Observatory (3) University of Florida (4) University of California Berkeley (5) Massachusetts Institute of Technology)

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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.

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