Systematizing the effective theory of self-interacting dark matter
Systematizing the effective theory of self-interacting dark matter
复制标题
系统化自相互作用暗物质的有效理论
DOI：
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发表时间：
2020
影响因子：
5.4
通讯作者：
M. Reece
中科院分区：
文献类型：
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作者：
P. Agrawal;Aditya Parikh;M. Reece
如果暗物质有很强的自相互作用，未来的天体物理学和宇宙学观测，以及对重子反馈效应的更清晰的理解，可能会被用来提取暗物质散射率的速度依赖性。为了解释这些数据，我们应该了解暗物质基本粒子性质的各种模型对这个量的预测。在本文中，我们系统地计算这个函数的费米子暗物质的光玻色子介质的矢量，标量，轴矢量，和赝标量类型。我们通过匹配自相互作用暗物质的非相对论有效理论，然后通过求解薛定谔方程非微扰地计算自旋平均粘性截面，从而解释任何可能的索末菲增强的低速截面。在赝标量的情况下，这需要不同的角动量模式的耦合通道分析。我们发现，相反的一些早期的分析，非相对论效应只提供了一个显着的增强光标量和矢量介质的情况下。用树能级量子场论很好地描述了光在赝标介质和轴向矢量介质中的散射。
If dark matter has strong self-interactions, future astrophysical and cosmological observations, together with a clearer understanding of baryonic feedback effects, might be used to extract the velocity dependence of the dark matter scattering rate. To interpret such data, we should understand what predictions for this quantity are made by various models of the underlying particle nature of dark matter. In this paper, we systematically compute this function for fermionic dark matter with light bosonic mediators of vector, scalar, axial vector, and pseudoscalar type. We do this by matching to the nonrelativistic effective theory of self-interacting dark matter and then computing the spin-averaged viscosity cross section nonperturbatively by solving the Schrödinger equation, thus accounting for any possible Sommerfeld enhancement of the low-velocity cross section. In the pseudoscalar case, this requires a coupled-channel analysis of different angular momentum modes. We find, contrary to some earlier analyses, that nonrelativistic effects only provide a significant enhancement for the cases of light scalar and vector mediators. Scattering from light pseudoscalar and axial vector mediators is well described by tree-level quantum field theory.
暗物质自相互作用的实用且一致的参数化
影响因子：
6.4
作者：
Chu, Xiaoyong;Garcia-Cely, Camilo;Murayama, Hitoshi
通讯作者：
Murayama, Hitoshi
影响因子：
4.8
作者：
J. Read;Matthew C. Walker;P. Steger
通讯作者：
J. Read;Matthew C. Walker;P. Steger