Hunting for new physics with the next generation of CMB experiments

Thibaut Louis (CEA)

We are living an exciting time in observational cosmology, the expansion rate inferred from low redshift observations is in disagreement with the one inferred from high redshift observations. While an explanation based on un-modelled systematics in the data is still a possibility, the case for new physics is also getting stronger. I will discuss how precise measurements of CMB polarisation by the next generation of CMB experiments could help revealing new physics beyond the standard model of cosmology.