Search for a Dark Matter candidate with the ATLAS detector

Supersymmetry is an appealing theory beyond the Standard Model and provides a natural Dark Matter candidate. First ATLAS searches for signals of supersymmetry in proton–proton collisions at the LHC are reported here, looking for an excess of events with jets, missing transverse momentum and 0 or 1 lepton; the full data sample recorded in the 2010 LHC run, corresponding to an integrated luminosity of 35 pb−1, has been analysed.