Testing the $n_s-H_0$ scaling relation with Planck-independent CMB data

Ze-Yu Peng, Yun-Song Piao

In early dark energy (EDE) resolution of Hubble tension, the spectral index $n_s$ of primordial scalar perturbation follows a scaling relation $\delta n_s\simeq 0.4\frac{\delta H_0}{H_0}$, w…