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Dark matter self-interactions from spin-2 mediators
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DOI：10.1140/epjc/s10052-021-09610-x.png)
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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.
Keyword:
INTERACTION CROSS-SECTION
CONSTRAINTS
SIMULATIONS
期刊
IF:
4.8
论文数:
1.8W
被引数:
4.7W
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