论文标题
宇宙学对多相互作用的暗物质的限制
Cosmological constraints on multi-interacting dark matter
论文作者
论文摘要
$λ$ CDM内越来越重要的紧张局势，加上实验室实验中缺乏暗物质（DM）的检测，增强了人们对非最小暗部门的兴趣，这些黑暗领域是理论上动机良好的，并激发了DM的新搜索策略。在这里，我们首次考虑DM与光子，重子和深色辐射（DR）同时相互作用的可能性。我们已经开发了Boltzmann代码类的新版本，该版本允许一个DM物种具有多个交互通道。使用此框架，我们在多相互作用的DM场景中重新评估了各种相互作用系数的现有宇宙学界限。我们发现这些不同的相互作用之间没有明确的变性，并表明它们的宇宙学效应在很大程度上是加性的。我们进一步调查了这些模型减轻宇宙张力的可能性，并发现DM-Photon和DM-DR Itsportations的组合可以同时降低$ S_8 $张力（从$2.3σ$ $2.3σ$到$1.2σ$）和$ H_0 $ tensens（$4.3σ$ to4.3σ$ to $3.1σ$）。我们的代码的公开发布将为研究各种丰富的黑暗领域的研究铺平道路。
The increasingly significant tensions within $Λ$CDM, combined with the lack of detection of dark matter (DM) in laboratory experiments, have boosted interest in non-minimal dark sectors, which are theoretically well-motivated and inspire new search strategies for DM. Here we consider, for the first time, the possibility of DM having simultaneous interactions with photons, baryons, and dark radiation (DR). We have developed a new and efficient version of the Boltzmann code CLASS that allows for one DM species to have multiple interaction channels. With this framework we reassess existing cosmological bounds on the various interaction coefficients in multi-interacting DM scenarios. We find no clear degeneracies between these different interactions and show that their cosmological effects are largely additive. We further investigate the possibility of these models to alleviate the cosmological tensions, and find that the combination of DM-photon and DM-DR interactions can at the same time reduce the $S_8$ tension (from $2.3σ$ to $1.2σ$) and the $H_0$ tension (from $4.3σ$ to $3.1σ$). The public release of our code will pave the way for the study of various rich dark sectors.
