Speaker: Shao-Jiang Wang (ITP-CAS-Beijing)
Title: The Perturbative Hubble Tension
Abstract: The standard model of modern cosmology is now in crisis to reach a consensus on the Hubble constant with upto $5\sigma$ discrepancy between measurements from the early and late Universe along with the other tension at $2\sigma$ level on the growth of matter perturbations. We further identify another $3\sigma$ tension from the variations in the Hubble constant with respect to the large-scale perturbations at positions of supernova-host galaxies. New physics beyond current understandings might be indispensable to restore the concordance among resolving these tensions.