Light Neutralino Dark Matter in the pMSSM: Implications of LEP, LHC and
  Dark Matter Searches on SUSY Particle Spectra
  We investigate the viability of light neutralino scenarios as promoted by
dark matter direct detection experiments. Using high statistics scans in the
pMSSM we have identified several scenarios which give rise to very light
neutralinos with large direct detection scattering cross sections. Our results
are challenged with 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 study the effect of a Higgs boson in the range 122.5
< Mh < 127.5 GeV. We show that several scenarios emerge in agreement with all
the constraints, and we study their characteristics and the LHC sensitivity.
