Dark Matter searches at the LHC

Searches for Dark Matter (DM) are performed by the ATLAS and CMS experiments in events involving large missing transverse energy in the detector. Recent analyses have been carried out in the context of the mono-jet, mono-photon, mono-top, mono-W and mono-Z signatures, including both hadronic and leptonic W and Z decays. No evidence of physics beyond the expectation of the Standard Model has been observed, and the production of DM particles has been interpreted assuming an effective field theory and simplified models. Limits on the suppression scale of the effective theory have been translated into bounds on the DM-nucleon scattering and DM annihilation cross sections. Results were derived from datasets of collisions at a center-of-mass energy of $\sqrt{s}=7$ and 8 TeV, with an integrated luminosity of up to 20/fb.