弹跳宇宙中的热产生和弱冻结暗物质
Thermally Producing and Weakly Freezing-out Dark Matter in Bouncing Universe
摘要：
我们在一个通用的弹跳宇宙框架中研究了具有恒定热平均截面的暗物质的产生和冻结。结果表明，除了已知的热产生强冻结和非热产生弱冻结两种情况外，还存在一种新的热产生弱冻结暗物质的途径，即暗物质的残余丰度分别与其截面成反比和正比.我们计算了这种新情况下暗物质的残余丰度，发现其残余丰度与其截面无关。我们还提出了这种新情况下的暗物质的横截面和质量关系的宇宙学约束。
英文摘要：
We investigate the production and freeze-out of dark matter with a constant thermally averaged cross-section in a generic bouncing universe framework. Our result shows that, there is a novel avenue that dark matter is produced thermally and take a weakly freezing-out process, besides two previously known cases, the thermally production & strongly freezing-out case and the non-thermally production & weakly freezing-out case, in which the relic abundance of dark matter are inverse and proportional to its cross-section respectively. We calculated the relic abundance of dark matter for this new case, and find its relic abundance is independent of its cross-section. We also present the cosmological constraints on the cross-section and mass relation of dark matter for this new case.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
