标题： 从QCD真空生成暗物质质量：解决暗物质-重子巧合问题的新方法 显示英文标题

标题： Generating the Dark Matter mass from the QCD vacuum: A new approach to the Dark Matter-Baryon coincidence problem

摘要： 暗物质和重子的可比丰度表明暗区和QCD区之间存在深刻的联系。 在不对称暗物质模型中，两个区的数密度被确保相似。 然而，一个完整的解决方案还应包括使质量可比的机制。 在本信中，我们提出一种解决方案，其中暗物质质量通过QCD真空生成，确保质量在GeV尺度。 该模型包含$\mathcal{O}(1)$ GeV的暗重子作为暗物质，以及暗介子（类轴子粒子）和暗光子。 显示英文摘要

摘要： The comparable abundances of dark matter and baryons imply a deep connection between the dark sector and the QCD sector. In models of asymmetric dark matter, the number densities of both sectors are ensured to be similar. However, a complete solution should also include a mechanism for comparable masses. In this letter, we present a solution in which the dark matter mass is generated through the QCD vacuum, ensuring the mass is at the GeV scale. The model features $\mathcal{O}(1)$ GeV dark baryons as dark matter, together with dark pions (axion-like particles) and dark photons.