Interacting dark energy from the joint analysis of the power spectrum and bispectrum multipoles with the EFTofLSS

Understand

Interacting dark energy models have been suggested as alternatives to the standard cosmological model, $\Lambda$CDM.

• We focus on a phenomenologically interesting class of dark scattering models that is characterised by pure momentum exchange between dark energy and dark matter.
• This model extends the parameter space with respect to $\Lambda$CDM by two parameters, $w$ and $A$, which define the dark energy equation of state and the strength of the coupling between dark energy and dark matter, respectively.
• In order to test non-standard cosmologies with Stage-IV galaxy clustering surveys, it is crucial to model mildly nonlinear scales and perform precision vs accuracy tests.