Speaker
Théo Simon
Description
The cosmic calibration tension is a > 5σ discrepancy between the cosmological distance ladder built from baryonic acoustic oscillations calibrated by the Planck/ΛCDM sound horizon and Type Ia supernovae calibrated with the SH0ES absolute magnitude. In this talk, I will emphasize the consequences of this tension beyond the value of the Hubble constant, and the implications for physics beyond ΛCDM. First, I will show that the SH0ES calibration implies (in addition to a higher value of H0) a larger physical matter density, a larger clustering amplitude S8, as well as a lower age of the universe. Second, I will talk about the role of early- and late-time new physics in resolving all these discrepancies.
