http://arxiv.org/abs/2301.06881
We report how to alleviate both the $H_0$ and $\sigma_8$ tensions simultaneously within $f(T)$ gravity. In particular, we consider the parametrization $f(T)=-T-2\Lambda/M_P^2+\alpha T^\beta$, where two out of the three parameters are independent. This model can efficiently fit observations solving the two tensions. To our knowledge, this is the first time where a modified gravity theory can alleviate both $H_0$ and $\sigma_8$ tensions simultaneously, hence, offering an additional argument in favor of gravitational modification.
E. Saridakis
Wed, 18 Jan 23
16/133
Comments: 10 pages, 3 figures, Invited talk at the 16th Marcel Grossmann meeting, based on arXiv:1909.06388 . Published at the proceedings of MG16