Complementary Searches of Low Mass Non-Abelian Vector Dark Matter, Dark Photon and Dark $Z^{\prime }$

Abstract

We present a novel study of the non-abelian vector dark matter candidate $W^{\prime }$ with a MeV$-$GeV low mass range, accompanied by a dark photon $A^{\prime }$ and a dark $Z^{\prime }$ of similar masses in the context of a simplified gauged two-Higgs-doublet model. The model is scrutinized by taking into account various experimental constraints including dark photon searches, electroweak precision data, relic density of dark matter together with its direct and indirect searches, mono-jet and Higgs collider physics from LHC. The viable parameter space of the model consistent with all experimental and theoretical constraints is exhibited. While a dark $Z^{\prime }$ can be the dominant contribution in the relic density due to resonant annihilation of dark matter, a dark photon is crucial to dark matter direct detection. We demonstrate that the parameter space can be further probed in the near future by sub-GeV dark matter experiments like CDEX, NEWS-G and SuperCDMS.

arXiv comment6 pages, 3 figures, 1 table

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