Naturally-Coupled Dark Sectors

The dark sector, composed of fields that are neutral under the standard model (SM) gauge group, can couple to SM through Higgs, hypercharge and neutrino portals, pull towards its scale by loop corrections. This instability, which is not possible prevent in known completions, such as supersymmetry, due sizable couplings SM, calls for alternative mechanisms neutralize sensitivities sector ultraviolet cutoff above it. Here we review a mechanism incorporation gravity into predicts existence allows it be naturally coupled SM. We discuss illustrate salient processes probe sectors.