Speaker
Description
The Hubble tension is a result of variations between the late-Universe measurements of $H_0$ and those inferred from early-Universe physics measurements. Many solutions have been proposed to address this tension; among the most successful are alterations to the early-Universe physics such as Early Dark Energy (EDE). However, each of these proposed solutions mitigate the tension at the expense of other quantities, such as the mild $S_8$ tension. Conversely, other solutions have been proposed to address the $S_8$ tension, such as Decaying Dark Matter (DDM), but these similarly fail to address all constraints as they do not alter $H_0$. The difficulty in finding a resolution could be an indicator that a single solution is not sufficient to resolve the tensions. Here we investigate how merging compatible models can address both $H_0$ and $S_8$ simultaneously, in particular, EDE $+$ DDM where EDE raises $H_0$ and DDM controls the growth of structure.
