LIGHT NEUTRALINOS AS DARK-MATTER IN THE UNCONSTRAINED MINIMAL SUPERSYMMETRIC STANDARD MODEL

The allowed parameter space for the lightest neutralino as the dark ma tter is explored using the minimal supersymmetric standard model as th e low-energy effective theory without further theoretical constraints such as GUT, Selecting values of the parameters which are in agreement with present experimental limits and applying the additional requirem ent that the lightest neutralino is in a cosmologically interesting ra nge, we give limits on the neutralino mass and composition. A similar analysis is also performed implementing the grand unification constrai nts, The elastic scattering cross section of the selected neutralinos on Al-27 and on other materials for dark matter experiments is discuss ed.