论文标题
脱钩的精确暗物质遗物丰度
Precise dark matter relic abundance in decoupled sectors
论文作者
论文摘要
暗物质（DM）作为原始等离子体的热遗物受到直接和间接搜索的压力，而脱钩扇区中相同的生产机制受到的约束要少得多。我们将冻结过程的标准处理扩展到这种情况，并对与观察到的DM丰度相匹配的歼灭横截面进行精确计算。我们证明，该“热横截面”的规范值的差异通常很大，并且可以达到数量级。我们的结果直接影响了隐藏部门场景中DM搜索的解释。
Dark matter (DM) as a thermal relic of the primordial plasma is increasingly pressured by direct and indirect searches, while the same production mechanism in a decoupled sector is much less constrained. We extend the standard treatment of the freeze-out process to such scenarios and perform precision calculations of the annihilation cross-section required to match the observed DM abundance. We demonstrate that the difference to the canonical value of this 'thermal cross-section' is generally sizeable, and can reach orders of magnitude. Our results directly impact the interpretation of DM searches in hidden sector scenarios.
