Speaker
Description
If the dark sector interacts with the visible one only through gravitational interactions, precision cosmology might be our best tool to test its dynamics. As a first step in this direction, we investigate the imprints of new long range forces acting solely on dark matter. Accounting for the presence of dark fifth forces in the effective field theory of large scale structure we derive the current best bound from a combination of CMB, BAO and BOSS data and forecast the sensitivity of future galaxy surveys. The presence of relative density and velocity fluctuations induces a pole in the bispectrum of two different tracers signalling the violation of the equivalence principle. We discuss under which circumstances a test of the equivalence principle violation can be performed in future surveys.
