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.

Cosmology intertwined III: fσ8 and S8

Capozziello S.;Pace F.;
2021-01-01

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.
2021
131
1
6
cosmological parameters; cosmological tensions
Di Valentino E.; Anchordoqui L.A.; Akarsu O.; Ali-Haimoud Y.; Amendola L.; Arendse N.; Asgari M.; Ballardini M.; Basilakos S.; Battistelli E.; Benetti M.; Birrer S.; Bouchet F.R.; Bruni M.; Calabrese E.; Camarena D.; Capozziello S.; Chen A.; Chluba J.; Chudaykin A.; Colgain E.O.; Cyr-Racine F.-Y.; de Bernardis P.; de Cruz Perez J.; Delabrouille J.; Dunkley J.; Escamilla-Rivera C.; Ferte A.; Finelli F.; Freedman W.; Frusciante N.; Giusarma E.; Gomez-Valent A.; Handley W.; Harrison I.; Hart L.; Heavens A.; Hildebrandt H.; Holz D.; Huterer D.; Ivanov M.M.; Joudaki S.; Kamionkowski M.; Karwal T.; Knox L.; Kumar S.; Lamagna L.; Lesgourgues J.; Lucca M.; Marra V.; Masi S.; Matarrese S.; Mazumdar A.; Melchiorri A.; Mena O.; Mersini-Houghton L.; Miranda V.; Moreno-Pulido C.; Mota D.F.; Muir J.; Mukherjee A.; Niedermann F.; Notari A.; Nunes R.C.; Pace F.; Paliathanasis A.; Palmese A.; Pan S.; Paoletti D.; Pettorino V.; Piacentini F.; Poulin V.; Raveri M.; Riess A.G.; Salzano V.; Saridakis E.N.; Sen A.A.; Shafieloo A.; Shajib A.J.; Silk J.; Silvestri A.; Sloth M.S.; Smith T.L.; Sola Peracaula J.; van de Bruck C.; Verde L.; Visinelli L.; Wandelt B.D.; Wang D.; Wang J.-M.; Yadav A.K.; Yang W.
File in questo prodotto:
File Dimensione Formato  
2008.11285.pdf

Accesso aperto

Tipo di file: PREPRINT (PRIMA BOZZA)
Dimensione 488.59 kB
Formato Adobe PDF
488.59 kB Adobe PDF Visualizza/Apri
2008.11285.pdf

Accesso aperto

Tipo di file: PREPRINT (PRIMA BOZZA)
Dimensione 488.59 kB
Formato Adobe PDF
488.59 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1842207
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 185
  • ???jsp.display-item.citation.isi??? 147
social impact