Searched for Mono-X at the LHC

If Dark Matter interacts weakly with the Standard Model it can be produced at the LHC and identified via initial state radiation (ISR) of the incoming partons. The signature left in the detector is that of the ISR particle (jet, photon, Z or W) recoiling off of the invisible Dark Matter particles, resulting in a large momentum imbalance. Similar signatures result from the compactification of extra spatial dimensions in the Arkani-Hamed, Dimopoulos, and Dvali model resulting in a Kaluza-Klein tower of massive graviton modes. The mono-X signature is also sensitive to a large class of SUSY models. The talk presents results from searches for new physics in final states containing a single jet, photon, W or Z boson and missing transverse energy studied by the ATLAS experiment at the LHC.