Recent theoretical ideas about dark sectors at the intensity frontier

The nature of DM interactions is unknown. If the DM is not charged under SM forces, it can communicate with it through so-called portal interactions. Renormalizable portals have received lots of attention in the past. However, in some models non-renormalizable portals can appear naturally as the leading interaction with the SM. Inclusive production cross-sections through these portals can be computed in a model independent fashion. In this way it is possible to put general constraints on a large class of Dark Sectors. High intensity experiments such as beam dumps and neutrino experiments offer a great opportunity to test these models, through specific signatures such as displaced vertices.