Complementary searches of low mass non-Abelian vector dark matter, dark photon, and dark Z′

We investigate a non-Abelian vector dark matter candidate W' with a MeV-GeV low mass range, accompanied by a dark photon A' and a dark Z' in the context of a gauged two-Higgs-doublet model. The model is scrutinized by considering various experimental constraints including dark photon searches, electroweak precision data, the relic density of dark matter together with its direct and indirect searches, monojet and Higgs data from the LHC. The viable parameter space indicates that while a dark Z' can be the dominant contribution in the relic density due to resonant annihilation of the dark matter, a dark photon is crucial to dark matter direct detection. The model can be further probed in the near future by sub-GeV dark matter and dark photon experiments.

Automated summary

The study investigates a non-Abelian vector dark matter candidate W' in the MeV-GeV low mass range, accompanied by a dark photon A' and a dark Z' in a gauged two-Higgs-doublet model. The viable parameter space suggests the importance of a dark photon in direct detection of dark matter, while a dark Z' can dominate the relic density due to resonant annihilation. The model can be further probed in the near future by sub-GeV dark matter and dark photon experiments.