论文标题
用红移空间失真数据集量化$ s_8 $张力集
Quantifying the $S_8$ tension with the Redshift Space Distortion data set
论文作者
论文摘要
$λ$ CDM模型的一个问题是宇宙微波背景（CMB）实验中的$ S_8 $与从晚期宇宙中的大规模观测获得的较小的$ S_8 $之间的张力。 $σ_8$量化了相对较高的聚类水平。贝叶斯对红移空间失真（RSD）选定数据集的分析产量：$ s_8 = 0.700^{+0.038} _ { - 0.037} $。 Fit在Planck 2018结果中具有$3σ$张力。使用高斯工艺方法，研究了对物质内均匀性生长历史的模型独立的重建。拟合产量$ s_8 = 0.707^{+0.085} _ { - 0.085}，0.701^{+0.089} _ { - 0.089} $，$ 0.731^{+0.063} _ { - 0.063} _ { - 0.062} $。张力减小，比$ 1.5 \，σ$更小。通过未来的测量，张力可能会减少，但是紧张的可能性是真实的情况。
One problem of the $Λ$CDM model is the tension between the $S_8$ found in Cosmic Microwave Background (CMB) experiments and the smaller one obtained from large-scale observations in the late Universe. The $σ_8$ quantifies the relatively high level of clustering. Bayesian Analysis of the Redshift Space Distortion (RSD) selected data set yields: $S_8 = 0.700^{+0.038}_{-0.037}$. The fit has $3σ$ tension with the Planck 2018 results. With Gaussian processes method a model-independent reconstructions of the growth history of matter in-homogeneity is studied. The fit yields $S_8 = 0.707^{+0.085}_{-0.085}, 0.701^{+0.089}_{-0.089}$, and $ 0.731^{+0.063}_{-0.062}$ for different kernels. The tension reduces and being smaller then $1.5\, σ$. With future measurements the tension may be reduced, but the possibility the tension is real is a plausible situation.
