Cosmology Intertwined III: $f σ_8$ and $S_8$
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: 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 standard $Λ$ Cold Dark Matter cosmological model provides a wonderful fit to current cosmological data, but a few tensions and anomalies became statistically significant with the latest data analyses. While these anomalies could be due to the presence of systematic errors in the experiments, they could also indicate the need for new physics beyond the standard model. In this Letter of Interest we focus on the tension of the Planck data with weak lensing measurements and redshift surveys, about the value of the matter energy density $Ω_m$, and the amplitude or rate of the growth of structure ($σ_8,fσ_8$). We list a few interesting models for solving this tension, and we discuss the importance of trying to fit with a single model a full array of data and not just one parameter at a time.
description: Snowmass2021 - Letter of Interest