Direct detection of dark matter in SU(5)xU(1) supergravity

Abstract

We compute the scattering rates for the lightest neutralino ${\chi }_1^0$ in the forthcoming germanium ${(}^{73}\mathrm{Ge}{+}^{76}\mathrm{Ge})$ detector and a proposed lead detector ${(}^{207}\mathrm{Pb})$, within the framework of $SU(5)\times U(1)$ supergravity. We find that in only a small portion ($\lsim10\%$) of the parameter spaces of this class of models, are the rates in the germanium detector above the expected initial experimental sensitivity of 0.1 events/kg/day. However, a much larger portion ($\lsim40\%$) of the parameter spaces could be probed with an improved background rejection capability (0.01 events/kg/day) and/or a more sensitive detector ${(}^{207}\mathrm{Pb})$.

10 pages, Latex, 4 figures included (uuencoded)

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• Neutralino-Nucleon Scattering Revisited
• On the Neutralino as Dark Matter Candidate - II. Direct Detection
• Possible constraints on SUSY-model Parameters from Direct Dark Matter Search
• Scrutinizing Supergravity Models through Neutrino Telescopes
• Experimental aspects of SU(5)xU(1) supergravity
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Cited by in corpus (4)

• Neutralino dark matter in supersymmetric models with non--universal scalar mass terms
• Searching for Relic Neutralinos using Neutrino Telescopes
• Compatibility of the new DAMA/NaI data on an annual modulation effect in WIMP direct search with a relic neutralino in supergravity schemes
• Supersymmetry: From the Fermi Scale to the Planck Scale