论文标题
暗物质冻结丰度的指数增强
Exponential Enhancement of Dark Matter Freezeout Abundance
论文作者
论文摘要
提出了一种用于热暗物质（DM）的新型范式，称为“弹跳暗物质”。在规范的热DM场景中，随着温度降低DM的质量，DM丰度成倍下降，直到发生热冷冻。本说明探索了更广泛的热DM模型，这些模型是该规则的例外，在这种规则中，DM丰度可以偏离指数下降的曲线，甚至在热平衡中呈指数级别。这种情况可以比当今的DM歼灭横截面要比规范热目标大得多，从而改善了DM歼灭信号的间接检测前景。
A novel paradigm for thermal dark matter (DM), termed "bouncing dark matter", is presented. In canonical thermal DM scenarios, the DM abundance falls exponentially as the temperature drops below the mass of DM, until thermal freezeout occurs. This note explores a broader class of thermal DM models that are exceptions to this rule, where the DM abundance can deviate from the exponentially falling curve, and even rise exponentially, while in thermal equilibrium. Such scenarios can feature present day DM annihilation cross sections much larger than the canonical thermal target, improving the prospects for indirect detection of DM annihilation signals.
