论文标题
BBN对普遍耦合的超轻标量暗物质的约束
BBN constraints on universally-coupled ultralight scalar dark matter
论文作者
论文摘要
超轻标量暗物质可以通过通用耦合与所有大型标准模型粒子相互作用。这种耦合会改变标准模型粒子质量，并影响大爆炸核合成的动力学。我们考虑到环境的标量质量的修改以及大爆炸核合成的全部动力学，对暗物质的宇宙学演变进行了建模。我们发现，在可用参数空间上，氦4丰度集的精度测量严格的约束，并且这些约束受到暗物质环境质量和中子冻结动力学的强烈影响。此外，我们在爱因斯坦和约旦框架中进行了分析，后者使我们能够将模型实现为数值的大爆炸核合成代码，并分析其他光元素。数值分析表明，氦4的约束在氘上占主导地位，并且对锂的影响不足以解决锂问题。与其他几个探针相比，我们发现大爆炸核合成为大多数参数空间设定了最强的约束。
Ultralight scalar dark matter can interact with all massive Standard Model particles through a universal coupling. Such a coupling modifies the Standard Model particle masses and affects the dynamics of Big Bang Nucleosynthesis. We model the cosmological evolution of the dark matter, taking into account the modifications of the scalar mass by the environment as well as the full dynamics of Big Bang Nucleosynthesis. We find that precision measurements of the helium-4 abundance set stringent constraints on the available parameter space, and that these constraints are strongly affected by both the dark matter environmental mass and the dynamics of the neutron freeze-out. Furthermore, we perform the analysis in both the Einstein and Jordan frames, the latter of which allows us to implement the model into numerical Big Bang Nucleosynthesis codes and analyze additional light elements. The numerical analysis shows that the constraint from helium-4 dominates over deuterium, and that the effect on lithium is insufficient to solve the lithium problem. Comparing to several other probes, we find that Big Bang Nucleosynthesis sets the strongest constraints for the majority of the parameter space.
