In this talk I will discuss the search for vector-like leptons (VLL) with exotic decays at hadron colliders and the possible complementarity between these results and those from Dark Matter (DM) experiments. I will motivate VLLs as predictions of several Beyond the Standard Model frameworks, namely composite Higgs models, and also as solutions to unexplained observations. The VLLs are usually searched for assuming they only decay to Standard Model (SM) particles, but in a more general model new decay channels can arise. I will consider an exotic decay to missing energy and a SM lepton and explore the collider phenomenology of such a VLL. For the case that the particle responsible for the missing energy signature is also stable at cosmological scales, it can be a potential DM candidate. I will discuss the interplay between this candidate and the VLL in generating the observed DM relic abundance and the complementarity between collider and DM searches.
IFIC seminar organizers