Dark matter self-interactions from spin-2 mediators

Dark matter self-interactions from spin-2 mediators

Blog Article

Abstract We propose a new mechanism for rendering dark matter self-interacting in the presence of a massive spin-2 mediator.The derived Yukawa-type click here 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 pentair hose 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.