Global fits of simplified models for dark matter with GAMBIT II. Vector dark matter with an $s$-channel vector mediator

Understand

Global fits explore different parameter regions of a given model and apply constraints obtained at many energy scales.

• This makes it challenging to perform global fits of simplified models, which may not be valid at high energies.
• In this study, we derive a unitarity bound for a simplified vector dark matter model with an $s$-channel vector mediator, and apply it to global fits of this model with \GB in order to correctly interpret missing energy searches at the LHC.
• Two parameter space regions emerge as consistent with all experimental constraints, corresponding to different annihilation modes of the dark matter.