论文标题
Spin-2介体的暗物质自我互动
Dark matter self-interactions from spin-2 mediators
论文作者
论文摘要
我们提出了一种新的机制，用于在存在巨大的Spin-2介体的情况下呈现暗物质自我互动。 Yukawa型暗物质的潜力独立于动量扩张的领先顺序的暗物质旋转，因此对暗物质自散射产生的非扰动效应也是如此。我们发现，天生的横截面和相对温和的共振效应有助于使自散射横截面速度依赖性。我们讨论了如何在暗物质歼灭上逃避当前的间接界限，并表明该模型与大型Spin-2粒子的无幽灵实现中的扰动单位性略有兼容。
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.
