论文标题
联合奇迹
Co-SIMP Miracle
论文作者
论文摘要
我们提出了一种基于半通知过程的热产生暗物质的新机制，$χ+χ+ \ text {sm} \rightarrowχ+ \χ+ \ text {sm} $，对暗物质的特性带来了令人着迷的后果。首先，其质量很低，$ \ lyssim 1 $ gev（但$ \ gtrsim 5 $ keV以避免结构形成约束）。其次，它是强烈的相互作用，导致黑暗和可见扇区之间的动力学平衡，避免了$χ+χ+χ+χ\ rightarrow的结构形成问题。第三，在$ 3 \ rightarrow 2 $过程中，消耗了一个暗物质粒子，使标准模型粒子具有单词后坐力。我们表明，目前允许这种新场景，这是令人惊讶的（也许是一个“小奇迹”）。但是，可以通过在当前和近期实验中进行新的分析来系统地测试它。特别是，热率暗物质的共木材模型可以解释Xenon1t的过量。
We present a new mechanism for thermally produced dark matter, based on a semi-annihilation-like process, $χ+ χ+\text{SM} \rightarrow χ+ \text{SM}$, with intriguing consequences for the properties of dark matter. First, its mass is low, $\lesssim 1$ GeV (but $\gtrsim 5$ keV to avoid structure-formation constraints). Second, it is strongly interacting, leading to kinetic equilibrium between the dark and visible sectors, avoiding the structure-formation problems of $χ+ χ+ χ\rightarrow χ+ χ$ models. Third, in the $3 \rightarrow 2$ process, one dark matter particle is consumed, giving the standard-model particle a monoenergetic recoil. We show that this new scenario is presently allowed, which is surprising (perhaps a "minor miracle"). However, it can be systematically tested by novel analyses in present and near-term experiments. In particular, the Co-SIMP model for thermal-relic dark matter can explain the XENON1T excess.
