Searching for Elusive Dark Sectors with Terrestrial and Celestial Observations

Understand

We consider the possible existence of a SM-neutral and light dark sector coupled to the visible sector through irrelevant portal interactions.

• Scenarios of this kind are motivated by dark matter and arise in various extensions of the Standard Model.
• We characterize the dark dynamics in terms of one ultraviolet scale $\Lambda_\text{UV}$, at which the exchange of heavy mediator fields generates the portal operators, and by one infrared scale $\Lambda_\text{IR}$, setting the mass gap.
• At energies $\Lambda_\text{IR} \ll E \ll \Lambda_\text{UV}$ the dark sector behaves like a conformal field theory and its phenomenology can be studied model independently.