论文标题
在黑暗原子上，大量的深色光子和毫米的子组件
On dark atoms, massive dark photons and millicharged sub-components
论文作者
论文摘要
我们提出了一个简单的模型，这些模型具有相反的Millicharge，可以通过交换大量的深色光子来形成电中性结合状态。如果在低温下抑制结合状态的形成，则毫米颗粒的亚优势含量在后期仍保留，这可能会在宇宙黎明的21 cm吸收曲线中引起有趣的特征。另一方面，主要的中性成分可以与普通物质具有偶极相互作用，从而导致直接检测实验中的非标准信号。我们确定了预测百分比离子化部分的参数区域，并从实验室搜索暗物质散射和深色光子衰减中进行了研究的约束。
We present a simple model of two dark matter species with opposite millicharge that can form electrically neutral bound states via the exchange of a massive dark photon. If bound state formation is suppressed at low temperatures, a sub-dominant fraction of millicharged particles remains at late times, which can give rise to interesting features in the 21 cm absorption profile at cosmic dawn. The dominant neutral component, on the other hand, can have dipole interactions with ordinary matter, leading to non-standard signals in direct detection experiments. We identify the parameter regions predicting a percent-level ionisation fraction and study constraints from laboratory searches for dark matter scattering and dark photon decays.
