Regular Article - Theoretical Physics
Dark matter self-interactions from spin-2 mediators
Department of Physics, Chung-Ang University, 06974, Seoul, South Korea
2 Theory Department, CERN, 1211, Geneva 23, Switzerland
Accepted: 2 September 2021
Published online: 5 October 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 how to evade the current indirect bounds on dark matter annihilations and show that the model is marginally compatible with perturbative unitarity in the ghost-free realization of the massive spin-2 particle.
© The Author(s) 2021
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