arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2002.12779hep-phastro-ph.COhep-th
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自旋2介质的暗物质自相互作用

Dark matter self-interactions from spin-2 mediators

Yoo-Jin Kang, Hyun Min Lee

摘要:

我们提出了一种新的机制,使暗物质自我相互作用的存在下,一个巨大的自旋2调解。推导出的暗物质的Yukawa型势与暗物质的自旋在动量膨胀的首阶无关,因此也与暗物质自散射的非微扰效应无关.我们发现,玻恩截面和相对温和的共振效应有助于使自散射截面速度依赖。我们讨论了如何规避目前的间接限制暗物质湮灭,并表明该模型是勉强兼容的大规模自旋2粒子的幽灵自由实现微扰么正性。

英文摘要:

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.

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