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Phys. Rev. D 69, 011101(R) (2004) [5 pages]

Improved rf cavity search for halo axions

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S. J. Asztalos1, R. F. Bradley2, L. Duffy3, C. Hagmann1, D. Kinion1, D. M. Moltz4, L. J. Rosenberg1, P. Sikivie3, W. Stoeffl1, N. S. Sullivan3, D. B. Tanner3, K. van Bibber1, and D. B. Yu5
1Lawrence Livermore National Laboratory, Livermore, California 94550, USA
2National Radio Astronomy Observatory, Charlottesville, Virginia 22903, USA
3Department of Physics, University of Florida, Gainesville, Florida 32611, USA
4Department of Chemistry, University of California, Berkeley, California 94720, USA
5Department of Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

Received 15 September 2003; published 7 January 2004

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 1.9–2.3μeV, broadening the search range to 1.9–3.3μeV. In addition, we report first results from an improved analysis technique.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.69.011101
DOI:
10.1103/PhysRevD.69.011101
PACS:
14.80.Mz, 95.35.+d, 98.35.Gi
 
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