CMB lensing in a modified model in light of the H0 tension
Abstract
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 \"u as a solution for H0 tension for CMB lensing and the low- and high-'s temperature (TT) power spectrum internal inconsistency. We show that this model relaxes the low- and high-'s TT mild inconsistency and the CMB lensing tensions simultaneously. Accordingly, \"u having the same number of free parameters as with lensing amplitude AL added, has a better fit with 2=-3.3.