Dark Matter Searches at the Large Hadron Collider

A search for Dark Matter particles directly produced in pairs at the Large Hadron Collider is presented. The search is performed using the full LHC Run-I dataset recorded with the CMS and ATLAS detectors in proton-proton collisions at a center-of-mass energy of 8 TeV. Dark matter production is searched for by looking for an excess of events with a large missing transverse momentum in association with energetic light or heavy flavour quark production, or in association with energetic leptons. The search is interpreted within the framework of an effective field theory, as well as of simplified models. No deviation from Standard Model background expectation is found and exclusion limits on Dark Matter production cross section are obtained.