FIMPs and SuperWIMPs at LHC

We report on minimal models of decaying Dark Matter, where the DM particle has suppressed couplings to the Standard Model fields and where the right DM relic density is obtained via the FIMP (Feebly Interacting Massive Particle) or SuperWIMP (SuperWeakly Interacting Massive Particle) mechanisms. This kind of models contains not only the DM particle, but at least one exotic scalar charged under part of the SM gauge group, and such particle can be produced at the LHC and give rise to displaced vertices and metastable tracks.