NEUTRALINO EVENT RATES IN DARK-MATTER DETECTORS

The expected event rates for (Z) over bar(1) dark matter for supergravity grand unified models are studied for a variety of dark matter detectors over the parameter space with tan beta less than or equal to 20 and a range of gluino masses where the maximum event rate can at least approach 10(-2) event/kg.da. This is the maximum sensitivity that the dark matter detectors can hope to achieve in the forseeable future. Radiative breaking constraints are implemented and effects of the heavy neutral Higgs as well as loop corrections to theneutral Higgs sector are included. The parameter space is further restricted so that the (Z) over bar(1) relic density obeys the CHDM constraint 0.10 less than or equal to Ohm((Z) over bar 1) h(2) less than or equal to 0.35, astronomical determinations of the Hubble constant. It is found that the best detectors sensitive to coherent (Z) over bar(1) scattering (e.g. Pb) are about 5-10 times more sensitive than those based on incoherent spin-dependent scattering (e.g. CaF). In general, the dark matter detectors are most sensitive to-the large tan beta and small m(o) and m (g) over bar sectors of the parameter space.