标题： 低ell对大尺度结构异常的影响 显示英文标题

标题： Impact of Low ell's on Large Scale Structure Anomalies

摘要： 我们通过考虑几个与透镜效应一致性参数相关的现象学修改来仔细研究了CMB报告的透镜异常，即$A_{\rm L}$。 仅考虑普朗克谱，我们发现$A_{\rm L}$存在显著的尺度依赖性（“运行”）。 然后我们证明，该异常完全由普朗克的低多极子数据驱动，即$\ell \leq 30$。 当排除这些数据点后，与其他多个数据集进行联合分析明显更倾向于$\Lambda$CDM模型，而非扩展的$\Lambda \rm CDM+A_L$模型。 不仅在这种情况下，CMB的透镜异常和低$\ell$异常消失，而且$S_8$张力也得到缓解，只有哈勃张力仍然存在。 显示英文摘要

摘要： We scrutinize the reported lensing anomaly of the CMB by considering several phenomenological modifications of the lensing consistency parameter, $A_{\rm L}$. Considering Planck spectra alone, we find statisically significant evidence for scale dependence (`running') of $A_{\rm L}$. We then demonstrate that the anomaly is entirely driven by Planck's low multipoles, $\ell \leq 30$. When these data points are excluded a joint analysis with several other datasets clearly favors $\Lambda$CDM over the extended $\Lambda \rm CDM+A_L$ model. Not only that the lensing anomaly and low $\ell$ anomaly of the CMB go away in this case, but also the $S_8$ tension is ameliorated, and only the Hubble tension persists.