Abstract
Three dark matter direct detection experiments have reported possible signals which can be interpreted as due to the interaction of light WIMPs with large scattering cross section. In this paper we investigate the viability of SUSY scenarios with light neutralino using high statistics scans in the pMSSM. We identify several scenarios which give rise to very light neutralinos with large direct detection scattering cross sections. We apply constraints from dark matter relic density, direct detection, indirect detection, as well as flavour physics, electroweak precision tests, LEP and Tevatron limits, LHC limits on SUSY, Higgs and monojet searches. In particular we require the Higgs boson mass to be in the range 122.5<M h <127.5 GeV. We study how the combination of these constraints largely reduces the number of viable scenarios. MSSM solutions with a light neutralino and an almost degenerate lightest scalar bottom quark emerge as the scenario in agreement with all these constraints. We study their characteristics in relation to the LHC missing E T searches.
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