Abstract
The PNL/USC ultralow background prototype Ge detector, in the Homestake goldmine, is being applied to searches for dark matter candidates. The low energy data exclude particles with spin independent Z° exchange interactions, with masses between 20 GeV and 5 TeV, as significant contributions to the cold dark matter of the halo of our galaxy. The existence of stable Dirac neutrinos more massive than 20 GeV is also excluded except for a narrow region around the Z° resonance.
The use of superconducting micron size grains in the search for the “missing mass” is discussed. The predicted count rates for massive neutrinos and supersymmetric relics from the early universe range from 10−1 – 103 counts per kilogram of active detector per day. The earth’s motion around the sun produces a significant annual modulation in this signal. Several experimental challenges remain in the development of this detector, but progress is rapid.
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© 1988 D. Reidel Publishing Company, Dordrecht, Holland
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Drukier, A.K. (1988). Invisible Cosmic Rays. In: Shapiro, M.M., Wefel, J.P. (eds) Genesis and Propagation of Cosmic Rays. NATO ASI Series, vol 220. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4025-3_29
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DOI: https://doi.org/10.1007/978-94-009-4025-3_29
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