# 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} }

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

### Scale-invariant alternatives to general relativity. III. The inflation-dark energy connection

- PhysicsPhysical 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…

### Quintessential α-attractor inflation: forecasts for Stage IV galaxy surveys

- 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…

### Hidden inflaton dark matter

- PhysicsJournal 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…

### α-attractor dark energy in view of next-generation cosmological surveys

- PhysicsJournal 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…

### Quintessential $\alpha$-attractor inflation: forecasts for Stage IV galaxy surveys

- 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…

### Higgs-dilaton model revisited: can dilaton act as QCD axion?

- 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…

### The road ahead of Horndeski: cosmology of surviving scalar-tensor theories

- 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…

### Dark energy from alpha-attractors: phenomenology and observational constraints

- 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…

### Constraints on field flows of quintessence dark energy

- PhysicsPhysical 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…

### Dark energy from α-attractors: phenomenology and observational constraints

- PhysicsJournal 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

### Cosmological Constraints on Higgs-Dilaton Inflation

- 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…

### Higgs-dilaton cosmology: From the early to the late Universe

- 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…

### Higgs-Dilaton cosmology: Universality versus criticality

- 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…

### Inflation and dark matter in the Higgs portal of classically scale invariant Standard Model

- Physics
- 2013

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…

### No Evidence for Extensions to the Standard Cosmological Model.

- PhysicsPhysical 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.

### Emergent scale symmetry: Connecting inflation and dark energy

- 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…

### Higgs mass naturalness and scale invariance in the UV

- 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…

### Late and early time phenomenology of Higgs-dependent cutoff

- 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…

### Higgs boson mass and new physics

- 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…