Skip to Main content Skip to Navigation
Journal articles

Minimally modified gravity fitting Planck data better than $\Lambda $CDM

Abstract : We study the phenomenology of a class of minimally modified gravity theories called $f(\mathcal {H})$ theories, in which the usual general relativistic Hamiltonian constraint is replaced by a free function of it. After reviewing the construction of the theory and a consistent matter coupling, we analyze the dynamics of cosmology at the levels of both background and perturbations, and present a concrete example of the theory with a 3-parameter family of the function f. Finally, we compare this example model to Planck data as well as some later-time probes, showing that such a realization of $f(\mathcal {H})$ theories fits the data significantly better than the standard $\Lambda $CDM model, in particular by modifying gravity at intermediate redshifts, $z\simeq 743$.
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-02870798
Contributor : Inspire Hep <>
Submitted on : Tuesday, June 16, 2020 - 10:11:38 PM
Last modification on : Thursday, July 8, 2021 - 6:05:40 PM

Links full text

Identifiers

Citation

Katsuki Aoki, Antonio de Felice, Shinji Mukohyama, Karim Noui, Michele Oliosi, et al.. Minimally modified gravity fitting Planck data better than $\Lambda $CDM. Eur.Phys.J.C, 2020, 80 (8), pp.708. ⟨10.1140/epjc/s10052-020-8291-1⟩. ⟨hal-02870798⟩

Share

Metrics

Record views

254