Strongly self-interacting vector dark matter via freeze-in

  title={Strongly self-interacting vector dark matter via freeze-in},
  author={Mateusz Duch and Bohdan Grzadkowski and Da Huang},
  journal={Journal of High Energy Physics},
A bstractWe study a vector dark matter (VDM) model in which the dark sector couples to the Standard Model sector via a Higgs portal. If the portal coupling is small enough the VDM can be produced via the freeze-in mechanism. It turns out that the electroweak phase transition have a substantial impact on the prediction of the VDM relic density. We further assume that the dark Higgs boson which gives the VDM mass is so light that it can induce strong VDM self-interactions and solve the small… 

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