Higgs-Dilaton cosmology: Universality vs. criticality

Abstract

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 predicts a small tensor-to-scalar ratio ($0.0021\le r\le 0.0034$), a tiny negative running of the spectral tilt ($-0.00057\le d{n}_s/d\ln k\le -0.00034$) and a nontrivial consistency relation between the spectral tilt of scalar perturbations and the dark energy equation of state, which turns out to be close to a cosmological constant ($0\le 1+w_{DE}\le 0.014$). We reconsider the validity of these predictions in the vicinity of the critical value of the Higgs self-coupling giving rise to an inflection point in the inflationary potential. The value of the inflationary observables in this case strongly depends on the parameters of the model. The tensor-to-scalar ratio can be large [$r\sim \mathcal{O}(0.1)$] and notably exceed its tree-level value. If that happens, the running of the scalar tilt becomes positive and rather big [$d{n}_s/d\ln k\sim \mathcal{O}(0.01)$] and the equation-of-state parameter of dark energy can significantly differ from a cosmological constant [$1+w_{DE}\sim \mathcal{O}(0.1)$].

5 pages, 3 figures, published version, added clarifications and references, corrected typos

References in corpus (27)

• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• The Standard Model Higgs boson as the inflaton
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Higgs mass and vacuum stability in the Standard Model at NNLO
• Investigating the near-criticality of the Higgs boson
• Higgs inflation: consistency and generalisations
• Higgs boson mass and new physics
• Standard Model Higgs boson mass from inflation: two loop analysis
• Running Inflation in the Standard Model
• Inflation scenario via the Standard Model Higgs boson and LHC
• Standard Model Higgs boson mass from inflation
• On initial conditions for the Hot Big Bang
• Preheating in the Standard Model with the Higgs-Inflaton coupled to gravity
• Quantum scale invariance, cosmological constant and hierarchy problem
• Scale invariance, unimodular gravity and dark energy
• Stability, Higgs Boson Mass and New Physics
• Higgs-Dilaton Cosmology: From the Early to the Late Universe
• Higgs inflation still alive
• Higgs boson, renormalization group, and naturalness in cosmology
• Higgs-Dilaton Cosmology: an effective field theory approach
• Observable gravitational waves from inflation with small field excursions
• Higgs xi-inflation for the 125-126 GeV Higgs: a two-loop analysis
• Cosmic Microwave Background Observables of Small Field Models of Inflation
• Higgs-Dilaton cosmology: Are there extra relativistic species?
• On the Predictiveness of Single-Field Inflationary Models
• New constraints on the observable inflaton potential from WMAP and SDSS
• Higgs inflation with singlet scalar dark matter and right-handed neutrino in light of BICEP2

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• Scale invariant alternatives to general relativity. II. Dilaton properties
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• Scale Invariant Gravity and Black Hole Ringdown
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• FeynMG: a FeynRules extension for scalar-tensor theories of gravity
• A particle's perspective on screening mechanisms
• Dark Horse, Dark Matter: Revisiting the SO(16)x SO(16)' Nonsupersymmetric Model in the LHC and Dark Energy Era
• Lensing dispersion of SNIa and small scales of the primordial power spectrum
• Dilaton-induced variations in Planck constant and speed of light: An alternative to Dark Energy
• Ephemeral Oscillons in Scalar-Tensor Theories: The Higgs-like case
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