Kinetic mixing, custodial symmetry and a lower bound on the dark $Z^{\prime }$ mass

M. Napsuciale, S. Rodríguez, H. Hernández-Arellano

In this work we consider the extension of the standard model by dark fields with an Abelian $U(1{)}_d$ spontaneously broken gauge symmetry in a hidden dark matter scenario. Conside…