Snowmass2021 - Letter of interest cosmology intertwined II: The hubble constant tension

Snowmass, Marco Bruni

Research output: Contribution to journalReview articlepeer-review

Abstract

The current cosmological probes have provided a fantastic confirmation of the standard Λ Cold Dark Matter cosmological model, which has been constrained with unprecedented accuracy. However, with the increase of the experimental sensitivity, a few statistically significant tensions between different independent cosmological datasets emerged. While these tensions can be in part the result of systematic errors, the persistence after several years of accurate analysis strongly hints at cracks in the standard cosmological scenario and the need for new physics. In this Letter of Interest we will focus on the 4.4σ tension between the Planck estimate of the Hubble constant H0 and the SH0ES collaboration measurements. After showing the H0 evaluations made from different teams using different methods and geometric calibrations, we will list a few interesting models of new physics that could solve this tension and discuss how the next decade's experiments will be crucial.

Original languageEnglish
Article number102605
Number of pages8
JournalAstroparticle Physics
Volume131
Early online date13 May 2021
DOIs
Publication statusPublished - Sep 2021

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