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Limits on dark matter using ancient mica

1995

4 pages

Published in:

Phys.Rev.Lett. 74 (1995) 4133-4136

DOI:

10.1103/PhysRevLett.74.4133

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{\mathit m}_{{{\mathit X}^{0}}}

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Abstract: (APS)

The combination of the track etching method and atomic force microscopy allows us to search for weakly interacting massive particles (WIMPs) in our Galaxy. A survey of 80 720 μm2 of 0.5 Gyr old muscovite mica found no evidence of WIMP-recoil tracks. This enables us to set limits on WIMPs which are about an order of magnitude weaker than the best spin-dependent WIMP limits. Unlike other detectors, however, the mica method is, at present, not background limited. We argue that a background may not appear until we have pushed our current limits down by several orders of magnitude.

dark matter
galaxy
postulated particle: WIMP
particle identification: (WIMP)
recoil
channel cross section: energy dependence
counters and detectors: crystal
experimental results

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Figures(0)

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