G-Curvaton
arXiv:1110.1795 · doi:10.1016/j.physletb.2011.12.016
Abstract
In this paper, we study a curvaton model where the curvaton is acted by Galileon field. We calculate the power spectrum of fluctuation of G-curvaton during inflation and discuss how it converts to the curvature perturbation after the end of inflation. We estimate the bispectrum of curvature perturbation induced, and show the dependence of non-Gaussianity on the parameters of model. It is found that our model can have sizable local and equilateral non-Gaussianities to up to , which is illustrated by an explicit example.
arXiv comment13 pages, no figure
References in corpus (85)
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- 4D Gravity on a Brane in 5D Minkowski Space
- The galileon as a local modification of gravity
- Generating the curvature perturbation without an inflaton
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Power Spectra and WMAP-Derived Parameters
- Covariant Galileon
- DBI in the Sky
- A General Analytic Formula for the Spectral Index of the Density Perturbations produced during Inflation
- Adiabatic CMB perturbations in pre-big bang string cosmology
- A new approach to the evolution of cosmological perturbations on large scales
- Effects of Cosmological Moduli Fields on Cosmic Microwave Background
- A general proof of the conservation of the curvature perturbation
- The primordial density perturbation in the curvaton scenario
- Nongaussian Isocurvature Perturbations from Inflation
- Generalized Galileons: All scalar models whose curved background extensions maintain second-order field equations and stress tensors
- Imperfect Dark Energy from Kinetic Gravity Braiding
- The inflationary prediction for primordial non-gaussianity
- G-inflation: inflation driven by the Galileon field
- k-Essence, superluminal propagation, causality and emergent geometry
- Super-Horizon Scale Dynamics of Multi-Scalar Inflation
- Non-Gaussianity of the primordial perturbation in the curvaton model
- Particle physics models of inflation and curvaton scenarios
- Galilean Genesis: an alternative to inflation
- Galileon Cosmology
- Cosmology of a covariant Galileon field
- Galileon inflation
- k-Mouflage gravity
- DBI and the Galileon reunited
- Running Non-Gaussianities in DBI Inflation
- Energy's and amplitudes' positivity
- Multi-field galileons and higher co-dimension branes
- Arbitrary p-form Galileons
- Self-Accelerating Universe in Galileon Cosmology
- Bouncing Galileon Cosmologies
- Scale-invariant cosmological perturbations from Horava-Lifshitz gravity without inflation
- The Inflationary Trispectrum for Models with Large Non-Gaussianities
- Higgs G-inflation
- Symmetries for Galileons and DBI scalars on curved space
- Non-Gaussianity, Spectral Index and Tensor Modes in Mixed Inflaton and Curvaton Models
- Galileon gravity and its relevance to late time cosmic acceleration
- Observational constraints on Galileon cosmology
- Galileons from Lovelock actions
- Galilean symmetry in the effective theory of inflation: new shapes of non-Gaussianity
- Primordial non-Gaussianity from the DBI Galileons
- Scale-dependent non-Gaussianity probes inflationary physics
- Rapidly-Varying Speed of Sound, Scale Invariance and Non-Gaussian Signatures
- Matter perturbations in Galileon cosmology
- Nearly Scale-Invariant Spectrum of Adiabatic Fluctuations May be from a Very Slowly Expanding Phase of the Universe
- The Curvaton as a Pseudo-Nambu-Goldstone Boson
- Scale dependence of local f_NL
- Signatures of Non-Gaussianity in the Curvaton Model
- Primordial non-Gaussianities in general modified gravitational models of inflation
- Primordial Perturbation in Horava-Lifshitz Cosmology
- de Sitter Galileon
- Curvaton with Polynomial Potential
- Primordial non-Gaussianity from G-inflation
- On the full trispectrum in single field DBI-inflation
- Stability and superluminality of spherical DBI galileon solutions
- Non-Gaussian Fingerprints of Self-Interacting Curvaton
- A Galileon Design of Slow Expansion
- Multi-galileons, solitons and Derrick's theorem
- Curvaton Dynamics and the Non-Linearity Parameters in Curvaton Model
- Bi-galileon theory II: phenomenology
- Large Non-Gaussianity Implication for Curvaton Scenario
- A General Analysis of Non-Gaussianity from Isocurvature Perturbations
- Galilean-invariant scalar fields can strengthen gravitational lensing
- The Curvature Perturbation in the Axion-type Curvaton Model
- The Subdominant Curvaton
- Scale-dependence of Non-Gaussianity in the Curvaton Model
- Curvaton and QCD Axion in Supersymmetric Theories
- Hilltop Non-Gaussianity
- Non-Gaussianity and Baryonic Isocurvature Fluctuations in the Curvaton Scenario
- N-vaton
- Primordial Non-Gaussianity in Models with Dark Matter Isocurvature Fluctuations
- Negative spectral index of in the axion-type curvaton model
- Effect of Background Evolution on the Curvaton Non-Gaussianity
- Non-Gaussianities of Single Field Inflation with Non-minimal Coupling
- Large Nonlocal Non-Gaussianity from a Curvaton Brane
- Gauss-Bonnet Term on Vacuum Decay
- Spectral Index in Curvaton Scenario
- Rotating a Curvaton Brane in a Warped Throat
- Gravitino Dark Matter and Non-Gaussianity
- Non-Gaussianity with Lagrange Multiplier Field in the Curvaton Scenario
- New features in curvaton model
- Non-Gaussianity and gravitational wave background in curvaton with a double well potential
Cited by in corpus (20)
- Conditions for the cosmological viability of the most general scalar-tensor theories and their applications to extended Galileon dark energy models
- Towards Anisotropy-Free and Non-Singular Bounce Cosmology with Scale-invariant Perturbations
- Galileon inflation evades the no-go for PBH formation in the single-field framework
- Disformal transformation of cosmological perturbations
- Primordial non-Gaussianity from ultra slow-roll Galileon inflation
- A Galileon Design of Slow Expansion: II
- Curvaton with nonminimal derivative coupling to gravity
- Realisation of the ultra-slow roll phase in Galileon inflation and PBH overproduction
- Can a spectator scalar field enhance inflationary tensor mode?
- Galileons with Gauge Symmetries
- Primordial magnetic fields from a non-singular bouncing cosmology
- Large fluctuations and Primordial Black Holes
- On dark energy models of single scalar field
- Curvaton with Nonminimal Derivative Coupling to Gravity II: Full Perturbation Analysis
- Primordial black holes from temporally enhanced curvature perturbation
- Generalized Galileon Model -- cosmological reconstruction and the Vainshtein mechanism --
- Galilean Islands in Eternally Inflating Background
- Modulated reheating by curvaton
- Metric-Affine Formalism of Higher Derivative Scalar Fields in Cosmology
- Interpreting Pulsar Timing Array data of Gravitational Waves with Ekpyrosis-Bouncing Cosmology