Preferred-frame Effects, the $H_0$ Tension, and Probes of Hořava-Lifshitz Gravity

Abstract

We discuss implications on the $H_0$ tension due to preferred-frame effects in the context of Hořava-Lifshitz gravity. By using a combination of low-redshift data (Sne1a, elliptical and lenticular galaxies, GRB's, and quasars) we study the $H_0$ tension and its appearance as a preferred-frame effect, as well as present new constraints on the model parameter $\hat{I}»$. Moreover, from the structure of the Friedmann equations, we argue that up to $38\%$ of the Hubble tension can be explained by Lorentz-violating effects in a Hořava-Lifshitz scenario.

Clarified methodology, restricted attention to one model. 10 pages, no figures