论文标题
暗物质自散射对遗物丰度的影响
Impact of dark matter self-scattering on its relic abundance
论文作者
论文摘要
弹性自散是不会改变暗物质颗粒的数量，因此在计算其遗物丰度时被忽略了。在这项工作中，我们强调了通过修改暗物质动量分布来对自我散文的存在对an灭过程的有效性产生重大影响的情况。我们研究了一些示例冻结的场景，涉及谐振和亚阈值歼灭，以及一个模型，具有较重的介体状态的衰减中的其他暗物质颗粒来源。有趣的是，当计算以暗物质动量分布函数的水平执行时，我们发现将额外的能量暗物质颗粒注入热量人群可能会导致其最终遗物丰度的$ \ textit {降低} $。
Elastic self-scatterings do not change the number of dark matter particles and as such have been neglected in the calculation of its relic abundance. In this work we highlight the scenarios where the presence of self-scatterings has a significant impact on the effectiveness of annihilation processes through the modification of dark matter momentum distribution. We study a few example freeze-out scenarios involving resonant and sub-threshold annihilations, as well as a model with an additional source of dark matter particles from the decays of a heavier mediator state. Interestingly, when the calculation is performed at the level of dark matter momentum distribution function, we find that the injection of additional energetic dark matter particles onto the thermal population can lead to a $\textit{decrease}$ of its final relic abundance.
