论文标题
关于暗物质与深色辐射相互作用并举起$ s_8 $张力的全形老板的限制
Full-shape BOSS constraints on dark matter interacting with dark radiation and lifting the $S_8$ tension
论文作者
论文摘要
在这项工作中，我们得出了从BOSS-DR12 GALAXY聚类数据的完整形状分析，以及Planck Legacy Cosmic微波背景（CMB）和Baryon声学振荡（BAO）测量结果的限制。我们考虑在有效的结构形成理论（ETHO）中进行参数化的一组模型，鉴于孩子弱透明结果，量化了$ s_8 $张力的提升。最有利的方案指出，相互作用的暗物质的分数$ f \ sim 10-100 \％$以及与CMB相比，$ξ\ sim 0.1-0.15 $较小的暗辐射温度，导致张力减少到$ \ sim1σ$级别。通过放松$ s_8 $张力而获得的相互作用速率的温度依赖性是针对黑暗部门中弱耦合的无冲突的非阿布莱$ SU（N）$量规交互的。为了将结果映射到此$ SU（N）$模型上，我们计算由于Debye筛选而导致的高阶校正。我们找到一个下限$α_d\ equiv g_d^2/（4π）\ gtrsim 10^{ - 8}（10^{ - 9}）$，用于暗物质质量$ 1000（1）$ 1000（1）$ gev放松$ s_8 $张力，与Galaxy Ellipticities and Seffications shoultsiontions相关的上限一致。
In this work we derive constraints on interacting dark matter-dark radiation models from a full-shape analysis of BOSS-DR12 galaxy clustering data, combined with Planck legacy cosmic microwave background (CMB) and baryon acoustic oscillation (BAO) measurements. We consider a set of models parameterized within the effective theory of structure formation (ETHOS), quantifying the lifting of the $S_8$ tension in view of KiDS weak-lensing results. The most favorable scenarios point to a fraction $f\sim 10-100\%$ of interacting dark matter as well as a dark radiation temperature that is smaller by a factor $ξ\sim 0.1-0.15$ compared to the CMB, leading to a reduction of the tension to the $\sim 1σ$ level. The temperature dependence of the interaction rate favored by relaxing the $S_8$ tension is realized for a weakly coupled unbroken non-Abelian $SU(N)$ gauge interaction in the dark sector. To map our results onto this $SU(N)$ model, we compute higher-order corrections due to Debye screening. We find a lower bound $α_d\equiv g_d^2/(4π)\gtrsim 10^{-8} (10^{-9})$ for dark matter mass $1000 (1)$ GeV for relaxing the $S_8$ tension, consistent with upper bounds from galaxy ellipticities and compatible with self-interactions relevant for small-scale structure formation.
