Dark matter is an exciting field of research with important ramifications for both particle physics and cosmology. Although we currently only know that dark matter interacts gravitationally, it is plausible that it is charged under a wide variety of possible forces, and could even be part of an entire dark sector with many types of particles just like the Standard Model. In this talk, we will investigate a certain type of dark sector that contains a U(1) force similar to electromagnetism, and look at constraints from particle production in the early universe, particle colliders and beam dumps. Motivated by several low-energy anomalies in particle physics, I will show that if this hidden force has an axial component (coupling to left-handed and right-handed fermions differently), it could open up areas of the dark matter parameter space that are otherwise suppressed.
