Towards UV Models of Kinetic Mixing and Portal Matter: A More Complex
Dark Matter Sector?
Towards UV Models of Kinetic Mixing and Portal Matter: A More Complex
Dark Matter Sector?
Portal Matter, with both SM and dark charges, induces KM between the $U(1)_D$ dark photon and the SM gauge fields offering an attractive mechanism by which light thermal DM can obtain its observed relic density. If DM is fermionic, the CMB informs us that it must be Majorana/pseudo-Dirac in nature …