RESEARCH
<< back
Snowmass2021 - Letter of interest cosmology intertwined III: fσ8 and S8

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, W. Handley, I. Harrison, Luke Hart, A. 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, T. Basaglia

Abstract
The standard Λ Cold Dark Matter cosmological model provides a wonderful fit to current cosmological data, but a few statistically significant tensions and anomalies were found in 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 between Planck data and weak lensing measurements and redshift surveys, in the value of the matter energy density Ωm and the amplitude σ8 (or the growth rate fσ8) of cosmic structure. We list a few promising models for solving this tension, and discuss the importance of trying to fit multiple cosmological datasets with complete physical models, rather than fitting individual datasets with a few handpicked theoretical parameters.

Keywords
cosmological tensions; cosmological parameters; Astrophysics - Cosmology and Nongalactic Astrophysics; High Energy Physics - Phenomenology

Astroparticle Physics
Volume 131, Number 1026
2021 September

>> ADS>> DOI

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