Jul 5 – 10, 2021
Europe/Rome timezone

Cosmological tensions: hints for a new concordance model?

Jul 5, 2021, 5:14 PM
22m
Invited talk in the parallel session Status of the H_0 and sigma_8 tensions: theoretical models and model-independent constraints Status of the H_0 and Sigma_8 Tensions: Theoretical Models and Model-Independent Constraints

Speaker

Eleonora Di Valentino (Durham University)

Description

The Cosmic Microwave Background temperature and polarization anisotropy measurements have provided strong confirmation of the LCDM model of structure formation. Even if this model can explain incredibly well the observations in a vast range of scales and epochs, with the increase of the experimental sensitivity, a few interesting tensions between the cosmological probes, and anomalies in the CMB data, have emerged with different statistical significance. While some portion of these discrepancies may be due to systematic errors, their persistence across probes strongly hints at cracks in the standard LCDM cosmological scenario. The most statistically significant is the Hubble constant puzzle and I will show a couple of interesting extended cosmological scenarios that can alleviate it.

Primary author

Eleonora Di Valentino (Durham University)

Presentation materials

Proceedings

Paper