论文标题
自我互动暗物质和大量自旋-2介质的有效理论
Effective theory for self-interacting dark matter and massive spin-2 mediators
论文作者
论文摘要
我们考虑使用任意旋转的自我相互作用的暗物质的有效理论，并通过引入大量的自旋2粒子作为暗物质自散射的介体，超越了文献中的先前讨论。我们以动量转移和暗物质速度在领先顺序扩展中介绍了暗物质的有效自我互动。我们比较有效的Yukawa相互作用的前列近似值，比较出生的横截面和非扰动横截面。结果，我们发现，对于速度依赖性的自散射有各种各样的暗物质和自旋-2粒子质量，可以解决星系的小规模问题，并同时满足星系簇的边界。
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.
