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

E. Di Valentino, Luis A. Anchordoqui, Özgür Akarsu, Yacine Ali-Haimoud, L. Amendola, Nikki Arendse, Marika Asgari, M. Ballardini, S. Basilakos, E. Battistelli, M. Benetti, Simon Birrer, F. R. Bouchet, M. Bruni, E. Calabrese, David Camarena, S. Capozziello, Angela Chen, J. Chluba, Anton Chudaykin, Eoin Ó. Colgáin, Francis-Yan Cyr-Racine, P. de Bernardis, Javier de Cruz Pérez, J. Delabrouille, J. Dunkley, Celia Escamilla-Rivera, A. Ferté, F. Finelli, Wendy Freedman, N. Frusciante, E. Giusarma, Adriŕ Gómez-Valent, Julien Guy, W. Handley, I. Harrison, Luke Hart, Alan Heavens, H. Hildebrandt, Daniel Holz, Dragan Huterer, M. M. Ivanov, Shahab Joudaki, M. Kamionkowski, Tanvi Karwal, L. Knox, Suresh Kumar, L Lamagna, J. Lesgourgues, Matteo Lucca, V. Marra, S. Masi, S. Matarrese, A. Mazumdar, A. Melchiorri, Olga Mena, Laura Mersini-Houghton, Vivian Miranda, Cristian Moreno-Pulido, D. F. Mota, Jessica Muir, Ankan Mukherjee, Florian Niedermann, Notari, Rafael C. Nunes, F. Pace, A. Paliathanasis, A. Palmese, Supriya Pan, D. Paoletti, V. Pettorino, F. Piacentini, V. Poulin, M. Raveri, A. G. Riess, V. Salzano, E. N. Saridakis, A. Sen, Arman Shafieloo, Anowar J. Shajib, J. Silk, A. Silvestri, Martin S. Sloth, Tristan L. Smith, Joan Solŕ Peracaula, C. van de Bruck, L. Verde, Luca Visinelli, B. D. Wandelt, D. Wang, Jian-Min Wang, Anil K. Yadav, Weiqiang Yang

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.

Astroparticle Physics
Volume 131, Number 1026
2021 September

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Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia