论文标题
朝正确的方向迈出一步？分析Wess Zumino深色辐射解决方案
A step in the right direction? Analyzing the Wess Zumino Dark Radiation solution to the Hubble tension
论文作者
论文摘要
Wess Zumino深色辐射（WZDR）模型在Arxiv中首次提出：2111.00014在基于局部和CMB的测量之间的狂热张力方面表现出巨大的希望。在这项工作中，我们调查了原始提案中的假设，并与其他独立数据集面对模型。我们表明，原始假设可能会影响总体结果，但通常是有动力的。我们进一步证明，对负$ω_k$的偏好仍然与$λ$ CDM模型相似，而$ a_l $张力略有增加。此外，$ \ ell <800 $和$ \ ell \ geq 800 $之间的Planck数据之间的张力大大减少了。独立的数据集在哈勃参数上显示出允许的范围，从而使张力进一步降低至$2.1σ$（不依赖CMB）或$1.9σ$（ACT+WMAP）。但是，没有组合表现出对WZDR存在的偏爱。我们还调查了其他深色辐射 - 暗物质相互作用是否也可以帮助缓解$ s_8 $张力。假设所有暗物质是相互作用的，并且与温度无关的散射率相互作用，我们发现CMB数据在此附加组件上过于限制，以至于允许聚类显着降低。
The Wess Zumino Dark Radiation (WZDR) model first proposed in arXiv:2111.00014 shows great promise as a well-motivated simple explanation of the Hubble tension between local and CMB-based measurements. In this work we investigate the assumptions made in the original proposal and confront the model with additional independent data sets. We show that the original assumptions can have an impact on the overall results but are usually well motivated. We further demonstrate that the preference for negative $Ω_k$ remains at a similar level as for the $Λ$CDM model, while the $A_L$ tension is slightly increased. Furthermore, the tension between Planck data for $\ell < 800$ and $\ell \geq 800$ is significantly reduced for the WZDR model. The independent data sets show slightly more permissive bounds on the Hubble parameter, allowing the tension to be further reduced to $2.1 σ$ (CMB-independent) or $1.9σ$ (ACT+WMAP). However, no combination shows a large preference for the presence of WZDR. We also investigate whether additional dark radiation -- dark matter interactions can help in easing the $S_8$ tension as well. Assuming all of the dark matter to be interacting and a temperature-independent scattering rate, we find that the CMB data are too restrictive on this additional component as to allow a significant decrease in the clustering.
