Dark matter from a conformal Dark Sector

A bstract We consider theories in which a dark sector is described by Conformal Field Theory (CFT) over broad range of energy scales. coupling the to Standard Model breaks conformal invariance. While weak at high energies, breaking grows infrared, and certain scale theory enters confined (hadronic) phase. One hadronic excitations can play role matter. study “Conformal Freeze-In” cosmological scenario, populated through its interactions with SM temperatures when it conformal. In this matter relic density determined CFT data, such as dimension operator coupled Model. show that simple highly predictive model phenomenologically viable. The observed reproduced for variety operators (“portals”) CFT, resulting models are consistent observational constraints. mass COFI candidate predicted be keV-MeV range.