Speaker
Description
Many models of Dark Matter (DM) have been proposed to accommodate the overwhelming evidence from cosmological and astrophysical sources. One popular category of such models are simplified models, which extend the Standard Model (SM) with a singlet DM particle and a mediator as a portal to the SM. In this talk I will present the results of various global fits of simplified models of DM, in which the DM particle is either a scalar, a fermion or a vector, and it couples to SM quarks via an s-channel vector mediator. We include constraints from direct and indirect detection of DM, as well as relic density constraints and searches for DM at colliders. We also include a state-of-the-art computation for the unitarity bound on vector DM coupled to a vector mediator. We find that the scalar and vector DM models can only survive the constraints for DM masses > 1 TeV, preferably when resonant annihilation via s-channel mediator is allowed. More interestingly, fermionic DM models can survive at lower DM masses, where they can fit a small excess on the included CMS monojet search.
