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The region of low neutralino masses as low as (5-10) GeV has attractedattention recently due to the possibility of excess events above background indark matter detectors. An analysis of spin independent neutralino-proton crosssections $\SI$ which includes this low mass region is given. The analysis isdone in MSSM with radiative electroweak symmetry breaking (REWSB). It is foundthat cross sections as large as $10^{-40}$ cm$^2$ can be accommodated in MSSMwithin the REWSB framework. However, inclusion of sparticle mass limits fromcurrent experiments, as well as lower limits on the Higgs searches from theTevatron, and the current experimental upper limit on $B_s\to \mu^+\mu^-$significantly limit the allowed parameter space reducing $\SI$ to lie below$\sim 10^{-41}$cm$^2$ or even lower for neutralino masses around 10 GeV. Thesecross sections are an order of magnitude lower than the cross sections neededto explain the reported data in the recent dark matter experiments in the lowneutralino mass region.

Low Mass Neutralino Dark Matter in the MSSM with Constraints from $B_s\to \mu^+\mu^-$ and Higgs Search Limits