Euclid: Forecasts on $\Lambda$CDM consistency tests with growth rate data
Abstract
The large-scale structure (LSS) of the Universe is an important probe for deviations from the canonical cosmological constant and cold dark matter (CDM) model. A statistically significant detection of any deviations would signify the presence of new physics or the breakdown of any number of the underlying assumptions of the standard cosmological model or possible systematic errors in the data. In this paper, we quantify the ability of the LSS data products of the spectroscopic survey of the Euclid mission, together with other contemporary surveys, to improve the constraints on deviations from CDM in the redshift range . We consider both currently available growth rate data and simulated data with specifications from Euclid and external surveys, based on CDM and a modified gravity (MoG) model with an evolving Newton's constant (denoted CDM), and carry out a binning method and a machine learning reconstruction, based on genetic algorithms (GAs), of several LSS null tests. Using the forecast Euclid growth data from the spectroscopic survey in the range , we find that in combination with external data products (covering the range ), Euclid will be able to improve on current constraints of null tests of the LSS on average by a factor of eight when using a binning method and a factor of six when using the GAs. Our work highlights the need for synergies between Euclid and other surveys, but also the usefulness of statistical analyses, such as GAs, in order to disentangle any degeneracies in the cosmological parameters. Both are necessary to provide tight constraints over an extended redshift range and to probe for deviations from the CDM model.
Cite
@article{arxiv.2507.22780,
title = {Euclid: Forecasts on $\Lambda$CDM consistency tests with growth rate data},
author = {I. Ocampo and D. Sapone and S. Nesseris and G. Alestas and J. García-Bellido and Z. Sakr and C. J. A. P. Martins and J. P. Mimoso and A. Carvalho and A. Da Silva and A. Blanchard and S. Casas and S. Camera and M. Martinelli and V. Pettorino and A. Amara and S. Andreon and N. Auricchio and C. Baccigalupi and M. Baldi and A. Balestra and S. Bardelli and P. Battaglia and F. Bernardeau and A. Biviano and E. Branchini and M. Brescia and G. Cañas-Herrera and V. Capobianco and C. Carbone and V. F. Cardone and J. Carretero and M. Castellano and G. Castignani and S. Cavuoti and K. C. Chambers and A. Cimatti and C. Colodro-Conde and G. Congedo and L. Conversi and Y. Copin and F. Courbin and H. M. Courtois and H. Degaudenzi and S. de la Torre and G. De Lucia and F. Dubath and C. A. J. Duncan and X. Dupac and S. Dusini and S. Escoffier and M. Farina and R. Farinelli and S. Farrens and F. Faustini and S. Ferriol and F. Finelli and P. Fosalba and N. Fourmanoit and M. Frailis and E. Franceschi and S. Galeotta and K. George and B. Gillis and C. Giocoli and J. Gracia-Carpio and A. Grazian and F. Grupp and S. V. H. Haugan and W. Holmes and F. Hormuth and A. Hornstrup and K. Jahnke and M. Jhabvala and B. Joachimi and E. Keihänen and S. Kermiche and B. Kubik and M. Kunz and H. Kurki-Suonio and A. M. C. Le Brun and S. Ligori and P. B. Lilje and V. Lindholm and I. Lloro and G. Mainetti and D. Maino and E. Maiorano and O. Mansutti and O. Marggraf and K. Markovic and N. Martinet and F. Marulli and R. J. Massey and E. Medinaceli and S. Mei and Y. Mellier and M. Meneghetti and E. Merlin and G. Meylan and A. Mora and M. Moresco and L. Moscardini and C. Neissner and S. -M. Niemi and C. Padilla and S. Paltani and F. Pasian and K. Pedersen and W. J. Percival and S. Pires and G. Polenta and M. Poncet and L. A. Popa and F. Raison and R. Rebolo and A. Renzi and J. Rhodes and G. Riccio and E. Romelli and M. Roncarelli and C. Rosset and R. Saglia and B. Sartoris and T. Schrabback and A. Secroun and E. Sefusatti and G. Seidel and M. Seiffert and S. Serrano and C. Sirignano and G. Sirri and A. Spurio Mancini and L. Stanco and J. Steinwagner and P. Tallada-Crespí and A. N. Taylor and I. Tereno and N. Tessore and S. Toft and R. Toledo-Moreo and F. Torradeflot and I. Tutusaus and L. Valenziano and J. Valiviita and T. Vassallo and G. Verdoes Kleijn and A. Veropalumbo and Y. Wang and J. Weller and G. Zamorani and F. M. Zerbi and E. Zucca and M. Ballardini and C. Burigana and L. Gabarra and A. Pezzotta and V. Scottez and M. Viel},
journal= {arXiv preprint arXiv:2507.22780},
year = {2025}
}
Comments
17 pages, 4 figures, 3 tables