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arXiv 1609.00399hep-ph
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自相互作用暗物质的残余密度会是由于湮灭成标准模型粒子吗?

Can the relic density of self-interacting dark matter be due to annihilations into Standard Model particles?

Xiaoyong Chu, Camilo Garcia-Cely, Thomas Hambye

摘要:

基于暗物质自相互作用为小尺度结构形成问题提供了一个解决方案的假设,我们研究了自相互作用暗物质候选者的残余密度可以从湮灭的热冻结到标准模型粒子的可能性。我们发现,标量和马约拉纳暗物质在$10-500$兆电子伏的质量范围内,再加上一个稍微重一些的大质量规范玻色子,是唯一可能的候选人在协议与多个当前的实验约束。在这里,暗物质湮灭的速度比自相互作用慢得多,这仅仅是因为连接标准模型和暗物质扇区的相互作用很小。我们还讨论了在未来的实验中建立或排除这两种情况的前景。

英文摘要:

Motivated by the hypothesis that dark matter self-interactions provide a solution to the small-scale structure formation problems, we investigate the possibilities that the relic density of a self-interacting dark matter candidate can proceed from the thermal freeze-out of annihilations into Standard Model particles. We find that scalar and Majorana dark matter in the mass range of $10-500$ MeV, coupled to a slightly heavier massive gauge boson, are the only possible candidates in agreement with multiple current experimental constraints. Here dark matter annihilations take place at a much slower rate than the self-interactions simply because the interaction connecting the Standard Model and the dark matter sectors is small. We also discuss prospects of establishing or excluding these two scenarios in future experiments.

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。

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