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If all strongly interacting sparticles (the squarks and the gluinos) in anunconstrained minimal supersymmetric standard model (MSSM) are heavier than thecorresponding mass lower limits in the minimal supergravity (mSUGRA) model,obtained by the current LHC experiments, then the existing data allow a varietyof electroweak (EW) sectors with light sparticles yielding dark matter (DM)relic density allowed by the WMAP data. Some of the sparticles may lie justabove the existing lower bounds from LEP and lead to many novel DM producingmechanisms not common in mSUGRA. This is illustrated by revisiting the abovesquark-gluino mass limits obtained by the ATLAS Collaboration, with anunconstrained EW sector with masses not correlated with the strong sector.Using their selection criteria and the corresponding cross section limits, wefind at the generator level using Pythia, that the changes in the mass limits,if any, are by at most 10-12% in most scenarios. In some cases, however, therelaxation of the gluino mass limits are larger ($\approx 20%$). If a subset ofthe strongly interacting sparticles in an unconstrained MSSM are within thereach of the LHC, then signals sensitive to the EW sector may be obtained. Thisis illustrated by simulating the $blj$$\etslash$, $l= e and \mu $, and $b\tauj$$\etslash$ signals in i) the light stop scenario and ii) the lightstop-gluino scenario with various light EW sectors allowed by the WMAP data.Some of the more general models may be realized with non-universal scalar andgaugino masses.

Many faces of low mass neutralino dark matter in the unconstrained MSSM, LHC data and new signals