Compatibility of the new DAMA/NaI data on an annual modulation effect in WIMP direct search with a relic neutralino in supergravity schemes

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Abstract
Recent results of the DAMA/NaI experiment for weakly interacting massive particle direct detection point to a possible annual modulation effect in the detection rate. We show that these results, when interpreted in terms of a relic neutralino, are compatible with supergravity models. Together with the universal supergravity (SUGRA) scheme, we also consider SUGRA models where the unification condition in the Higgs mass parameters at a grand unified theory scale is relaxed.
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