Relic abundance of dark photon dark matter
Relic abundance of dark photon dark matter
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DOI：
10.1016/j.physletb.2019.135136
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发表时间：
2020-02-10
影响因子：
4.4
通讯作者：
Takahashi, Fuminobu
中科院分区：
文献类型：
--
作者：
Agrawal, Prateek;Kitajima, Naoya;Takahashi, Fuminobu
我们提出了一种新的机制，用于在其质量的宽范围内产生正确的暗光子暗物质的遗迹丰度，延伸到10（-20）eV。暗物质丰度最初存储在一个轴子中，该轴子与其最小值不一致。当轴子开始振荡时，它通过快子不稳定性有效地将其能量转化为暗光子。如果暗光子的质量在轴子质量的几个数量级之内，m（gamma '）/m（alpha）= O（10（-3）- 1），那么暗光子就构成了今天暗物质的主要形式。我们提出了一个数值晶格模拟的基准模型，明确实现我们的机制。这一机制坚定了许多寻找暗光子暗物质的实验的动机。(C)2019作者由爱思唯尔公司出版
We present a new mechanism for producing the correct relic abundance of dark photon dark matter over a wide range of its mass, extending down to 10(-20) eV. The dark matter abundance is initially stored in an axion which is misaligned from its minimum. When the axion starts oscillating, it efficiently transfers its energy into dark photons via a tachyonic instability. If the dark photon mass is within a few orders of magnitude of the axion mass, m(gamma')/m(alpha) = O(10(-3) - 1), then dark photons make up the dominant form of dark matter today. We present a numerical lattice simulation for a benchmark model that explicitly realizes our mechanism. This mechanism firms up the motivation for a number of experiments searching for dark photon dark matter. (C) 2019 The Authors. Published by Elsevier B.V.