Combined constraints on dark photons from high-energy collisions, cosmology, and astrophysics

A. W. Romero Jorge, L. Sagunski, Guan-Wen Yuan +2

We investigate a dark sector coupled to the Standard Model (SM) through a kinetically mixed dark photon $U$ associated with a new $U(1{)}^{\prime }$ gauge symmetry. Kinetic mixing $\varepsilo…