Dark matter self-interactions from spin-2 mediators

@article{Kang2021DarkMS,
  title={Dark matter self-interactions from spin-2 mediators},
  author={Yoo-Jin Kang and Hyun Min Lee},
  journal={The European Physical Journal C},
  year={2021}
}
We propose a new mechanism for rendering dark matter self-interacting in the presence of a massive spin-2 mediator. The derived Yukawa-type potential for dark matter is independent of the spins of dark matter in the leading order of the momentum expansion, so are the resulting non-perturbative effects for the dark matter self-scattering. We find that both the Born cross section and relatively mild resonance effects assist to make the self-scattering cross section velocity-dependent. We discuss… 
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