论文标题
弹跳暗物质
Bouncing Dark Matter
论文作者
论文摘要
我们提出了一种用于热暗物质产生的新型机制，其特征是“弹跳”：从规范指数呈指数下降的丰度到指数上升的暗物质平衡分布过渡，从而增强了许多数量级的冷冻量丰度。我们讨论了一些弹跳暗物质的实现。反弹使当今的暗物质歼灭横截面明显大于规范的热目标，从而改善了间接检测信号的前景。
We present a novel mechanism for thermal dark matter production, characterized by a "bounce": the dark matter equilibrium distribution transitions from the canonical exponentially falling abundance to an exponentially rising one, resulting in an enhancement of the freezeout abundance by many orders of magnitude. We discuss several realizations of bouncing dark matter. The bounce allows the present day dark matter annihilation cross section to be significantly larger than the canonical thermal target, improving the prospects for indirect detection signals.
