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Vector SIMP dark matter with approximate custodial symmetry

Abstract : We consider a novel scenario for Vector Strongly Interacting Massive Particle (VSIMP) dark matter with local $SU(2)_X\times U(1)_{Z'}$ symmetry in the dark sector. Similarly to the Standard Model, after the dark symmetry is broken spontaneously by the VEVs of dark Higgs fields, the approximate custodial symmetry determines comparable but split masses for $SU(2)_X$ gauge bosons. In this model, we show that $U(1)_{Z'}$-charged gauge bosons of $SU(2)_X$ ($X_\pm$) becomes a natural candidate for SIMP dark matter, annihilating through $3\rightarrow 2$ or forbidden $2\rightarrow 2$ annihilations due to gauge self-interactions. On the other hand, the $U(1)_{Z'}$-neutral gauge boson of $SU(2)_X$ achieves the kinetic equilibrium of dark matter through a gauge kinetic mixing between $U(1)_{Z'}$ and Standard Model. We present the parameter space for the correct relic density in our model and discuss in detail the current constraints and projections from colliders and direct detection experiments.
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Preprints, Working Papers, ...
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Contributor : Yann Mambrini <>
Submitted on : Sunday, April 21, 2019 - 1:03:07 AM
Last modification on : Wednesday, October 14, 2020 - 4:00:41 AM

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  • HAL Id : hal-02105402, version 1
  • ARXIV : 1904.04109



Soo-Min Choi, Hyun Min Lee, Y. Mambrini, Mathias Pierre. Vector SIMP dark matter with approximate custodial symmetry. 2019. ⟨hal-02105402⟩



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