论文标题
$ H_0 $张力的修改后的$λ$ CDM模型中的CMB镜头
CMB lensing in a modified $Λ$CDM model in light of the $H_0$ tension
论文作者
论文摘要
与宇宙微波背景（CMB）数据的本地宇宙中观察到的哈勃参数测量值的差异可能表明新物理学。测试将哈勃张力与其他宇宙学观察结果调和的替代模型至关重要。 CMB镜头是一个关键观察，将早期宇宙扰动与此问题的延迟分布有关。在这项工作中，我们研究了ü$λ$ CDM的预测，作为CMB镜头$ H_0 $张力的解决方案以及低 - $ - $ - $ - $ \ ell $的温度（TT）功率光谱内部不一致。我们表明，该模型同时放松了低和高 - $ \ ell $的TT轻度不一致和CMB镜头张力。因此，ü$λ$ CDM具有与$λ$ CDM相同的免费参数，并添加了镜头幅度$ a_l $，与$Δχ^2 = -3.3 $更适合。
The observed discrepancy of the Hubble parameter measurements in the local universe with the cosmic microwave background (CMB) data may indicate a new physics. It is vital to test the alternative models that reconcile the Hubble tension with other cosmological observations in this direction. The CMB lensing is a crucial observation that relates the early universe perturbations to the matter's late-time distribution. In this work, we study the prediction of the ü$Λ$CDM as a solution for $H_0$ tension for CMB lensing and the low- and high-$\ell$'s temperature (TT) power spectrum internal inconsistency. We show that this model relaxes the low- and high-$\ell$'s TT mild inconsistency and the CMB lensing tensions simultaneously. Accordingly, ü$Λ$CDM having the same number of free parameters as $Λ$CDM with lensing amplitude $A_L$ added, has a better fit with $Δχ^2=-3.3$.
