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arXiv 2003.09290hep-phastro-ph.GAhep-th
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自相互作用暗物质和大质量自旋2介质的有效理论

Effective theory for self-interacting dark matter and massive spin-2 mediators

Yoo-Jin Kang, Hyun Min Lee

摘要:

我们考虑了任意自旋自相互作用暗物质的有效理论,通过引入一个质量为2的自旋粒子作为暗物质自散射的介质,超越了文献中的讨论.我们给出了暗物质的有效自相互作用在首阶展开中的动量转移和暗物质速度。在有效汤川相互作用的首级近似下,我们比较了玻恩截面和非微扰截面。结果表明,对于速度依赖的自散射,在满足星系团边界条件的同时,还可以在很宽的暗物质和自旋2粒子质量范围内解决星系中的小尺度问题.

英文摘要:

We consider the effective theory for self-interacting dark matter with arbitrary spin and go beyond the previous discussion in the literature by introducing a massive spin-2 particle as the mediator for the dark matter self-scattering. We present the effective self-interactions for dark matter in the leading order expansions with the momentum transfer and the dark matter velocity. We compare between the Born cross section and the non-perturbative cross section in the leading order approximation of the effective Yukawa interaction. As a result, we find that there is a wide range of dark matter and spin-2 particle masses for a velocity-dependent self-scattering to solve small-scale problems at galaxies as well as satisfy the bounds from galaxy clusters at the same time.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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