Cosmology Intertwined II: The Hubble Constant Tension
Creators: name: Di Valentino, Eleonora
name: Anchordoqui, Luis A.
name: Akarsu, Ozgur
name: Ali-Haimoud, Yacine
name: Amendola, Luca
name: Arendse, Nikki
name: Asgari, Marika
name: Ballardini, Mario
name: Basilakos, Spyros
name: Battistelli, Elia
name: Benetti, Micol
name: Birrer, Simon
name: Bouchet, François R.
name: Bruni, Marco
name: Calabrese, Erminia
name: Camarena, David
name: Capozziello, Salvatore
name: Chen, Angela
name: Chluba, Jens
name: Chudaykin, Anton
name: Colgáin, Eoin Ó
name: Cyr-Racine, Francis-Yan
name: de Bernardis, Paolo
name: Pérez, Javier de Cruz
name: Delabrouille, Jacques
name: Dunkley, Jo
name: Escamilla-Rivera, Celia
name: Ferté, Agnès
name: Finelli, Fabio
name: Freedman, Wendy
name: Frusciante, Noemi
name: Giusarma, Elena
name: Gómez-Valent, Adrià
name: Guy, Julien
name: Handley, Will
name: Harrison, Ian
name: Hart, Luke
name: Heavens, Alan
name: Hildebrandt, Hendrik
name: Holz, Daniel
name: Huterer, Dragan
name: Ivanov, Mikhail M.
name: Joudaki, Shahab
name: Kamionkowski, Marc
name: Karwal, Tanvi
name: Knox, Lloyd
name: Kumar, Suresh
name: Lamagna, Luca
name: Lesgourgues, Julien
name: Lucca, Matteo
name: Marra, Valerio
name: Masi, Silvia
name: Matarrese, Sabino
name: Mazumdar, Arindam
name: Melchiorri, Alessandro
name: Mena, Olga
name: Mersini-Houghton, Laura
name: Miranda, Vivian
name: Moreno-Pulido, Cristian
name: Mota, David F.
name: Muir, Jessica
name: Mukherjee, Ankan
name: Niedermann, Florian
name: Notari, Alessio
name: Nunes, Rafael C.
name: Pace, Francesco
name: Paliathanasis, Andronikos
name: Palmese, Antonella
name: Pan, Supriya
name: Paoletti, Daniela
name: Pettorino, Valeria
name: Piacentini, Francesco
name: Poulin, Vivian
name: Raveri, Marco
name: Riess, Adam G.
name: Salzano, Vincenzo
name: Saridakis, Emmanuel N.
name: Sen, Anjan A.
name: Shafieloo, Arman
name: Shajib, Anowar J.
name: Silk, Joseph
name: Silvestri, Alessandra
name: Sloth, Martin S.
name: Smith, Tristan L.
name: Solà, Joan
name: van de Bruck, Carsten
name: Verde, Licia
name: Visinelli, Luca
name: Wandelt, Benjamin D.
name: Wang, Deng
name: Wang, Jian-Min
name: Yadav, Anil K.
name: Yang, Weiqiang
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The current cosmological probes have provided a fantastic confirmation of the standard $Λ$ Cold Dark Matter cosmological model, that 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 portion 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 $H_0$ and the SH0ES collaboration measurements. After showing the $H_0$ evaluations made from different teams using different methods and geometric calibrations, we will list a few interesting new physics models that could solve this tension and discuss how the next decade experiments will be crucial.
description: Snowmass2021 - Letter of Interest