# Higgs-dilaton cosmology: An inflation-dark-energy connection and forecasts for future galaxy surveys

@article{Casas2017HiggsdilatonCA,
title={Higgs-dilaton cosmology: An inflation-dark-energy connection and forecasts for future galaxy surveys},
author={Santiago Casas and Martin Pauly and Javier Rubio},
journal={Physical Review D},
year={2017},
volume={97},
pages={043520}
}
• Published 13 December 2017
• Physics
• Physical Review D
The Higgs-Dilaton model is a scale-invariant extension of the Standard Model non-minimally coupled to gravity and containing just one additional degree of freedom on top of the Standard Model particle content. This minimalistic scenario predicts a set of measurable consistency relations between the inflationary observables and the dark-energy equation-of-state parameter. We present an alternative derivation of these consistency relations that highlights the connections and differences with the…
48 Citations

## Figures and Tables from this paper

• Physics
Physical Review D
• 2019
We discuss the cosmological phenomenology of biscalar-tensor models displaying a maximally symmetric Einstein-frame kinetic sector and constructed on the basis of scale symmetry and volume-preserving
• Physics
• 2021
Single-field models of α-attractor quintessential inflation provide a unified picture of the two periods of early- and late-time cosmic acceleration, where both inflation and dark energy are
• Physics
Journal of Cosmology and Astroparticle Physics
• 2019
If cosmic inflation was driven by an electrically neutral scalar field stable on cosmological time scales, the field necessarily constitutes all or part of dark matter (DM). We study this possibility
• Physics
Journal of Cosmology and Astroparticle Physics
• 2019
The α-attractor inflationary models are nowadays favored by CMB Planck observations. Their similarity with canonical quintessence models motivates the exploration of a common framework that explains
• Physics
• 2020
Single-field models of $\alpha$-attractor quintessential inflation provide a unified picture of the two periods of early- and late-time cosmic acceleration, where both inflation and dark energy are
• Physics
• 2022
: The Standard Model Lagrangian has an approximate scale symmetry in the high-energy limit. This observation can be included in the fundamental principle of the ultimate theory of Nature as the
• Mathematics
• 2018
In the context of the effective field theory of dark energy (EFT) we perform agnostic explorations of Horndeski gravity. We choose two parametrizations for the free EFT functions, namely a power law
• Physics
• 2018
. The possibility of linking inﬂation and late cosmic accelerated expansion using the α -attractor models has received increasing attention due to their physical motivation. In the early universe, α
• Physics
Physical Review D
• 2019
The quest for understanding the late-time acceleration is haunted by an immense freedom in the analysis of dynamical models for dark energy in extended parameter spaces. Often-times having no prior
• Physics
Journal of Cosmology and Astroparticle Physics
• 2018
The possibility of linking inflation and late cosmic accelerated expansion using the α-attractor models has received increasing attention due to their physical motivation. In the early universe,

## References

SHOWING 1-10 OF 171 REFERENCES

• Physics
• 2016
We test the viability of the Higgs-dilaton model (HDM) compared to the evolving dark energy ($w_0 w_a$CDM) model, in which the cosmological constant model $\Lambda$CDM is also nested, by using the
• Physics
• 2011
We consider a minimal scale-invariant extension of the standard model of particle physics combined with unimodular gravity formulated in [M. Shaposhnikov and D. Zenhausern, Phys. Lett. B 671, 187
• Physics
• 2014
The Higgs-Dilaton model is able to produce an early inflationary expansion followed by a dark energy dominated era responsible for the late time acceleration of the Universe. At tree level, the model
A bstractWe consider a minimal classically scale-invariant extension of the Standard Model. In this theory, the Higgs mechanism is triggered and the electroweak symmetry breaking is generated
• Physics
Physical review letters
• 2017
The Bayesian evidence for models considered in the main analysis of Planck cosmic microwave background data is computed, finding that extensions beyond the standard cosmological model are disfavored by Planck data.
• Physics
• 2017
Quantum gravity computations suggest the existence of an ultraviolet and an infrared fixed point where quantum scale invariance emerges as an exact symmetry. We discuss a particular variable gravity
• Physics
• 2014
It has been suggested that electroweak symmetry breaking in the standard model may be natural if the standard model merges into a conformal field theory (CFT) at short distances. In such a scenario
• Physics
• 2011
The analysis of theories with non-minimal coupling of Higgs field to gravity revealed that they enter into strong coupling regime above certain Higgs-dependent cutoff, which may be considerably below
• Physics
• 2012
A bstractWe discuss the lower Higgs boson mass bounds which come from the absolute stability of the Standard Model (SM) vacuum and from the Higgs inflation, as well as the prediction of the Higgs