The effective field theory of K-mouflage - Archive ouverte HAL Access content directly
Journal Articles Journal of Cosmology and Astroparticle Physics Year : 2016

The effective field theory of K-mouflage

(1) , (1)
1

Abstract

We describe K-mouflage models of modified gravity using the effective field theory of dark energy. We show how the Lagrangian density $K$ defining the K-mouflage models appears in the effective field theory framework, at both the exact fully nonlinear level and at the quadratic order of the effective action. We find that K-mouflage scenarios only generate the operator $(\delta g^{00}_{(u)})^n$ at each order $n$. We also reverse engineer K-mouflage models by reconstructing the whole effective field theory, and the full cosmological behaviour, from two functions of the Jordan-frame scale factor in a tomographic manner. This parameterisation is directly related to the implementation of the K-mouflage screening mechanism: screening occurs when $ K'$ is large in a dense environment such as the deep matter and radiation eras. In this way, K-mouflage can be easily implemented as a calculable subclass of models described by the effective field theory of dark energy which could be probed by future surveys.
Fichier principal
Vignette du fichier
Vala3.pdf (653.99 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

cea-01201562 , version 1 (24-02-2021)

Identifiers

Cite

Philippe Brax, Patrick Valageas. The effective field theory of K-mouflage. Journal of Cosmology and Astroparticle Physics, inPress, 2016 (01), pp.020. ⟨10.1088/1475-7516/2016/01/020⟩. ⟨cea-01201562⟩
101 View
39 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More