Non-Gaussianity from Attractor Curvaton

Abstract

We propose a curvaton model in which the initial condition of the curvaton oscillation is determined by its attractor behavior during inflation. Assuming a chaotic inflation model, we find that the initial condition determined by the attractor behavior is appropriate to generate a sizable non-Gaussianity contribution to the curvature perturbation, which will be tested in the foreseeable future. Implications on the thermal history of the universe and on particle physics models are also discussed.

19 pages, 1 figure

References in corpus (40)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Non-Gaussian features of primordial fluctuations in single field inflationary models
• Generating the curvature perturbation without an inflaton
• New cosmological constraints on primordial black holes
• Leptogenesis for Pedestrians
• Adiabatic CMB perturbations in pre-big bang string cosmology
• Effects of Cosmological Moduli Fields on Cosmic Microwave Background
• The primordial density perturbation in the curvaton scenario
• Nongaussian Isocurvature Perturbations from Inflation
• Supersymmetric Q-balls as dark matter
• Wino Cold Dark Matter from Anomaly-Mediated SUSY Breaking
• Q-Balls and Baryogenesis in the MSSM
• Superheavy dark matter
• Natural Chaotic Inflation in Supergravity
• Phenomenological consequences of supersymmetry with anomaly-induced masses
• PeV-Scale Supersymmetry
• B-ball Baryogenesis and the Baryon to Dark Matter Ratio
• The Lightest Higgs Boson Mass in Pure Gravity Mediation Model
• Detection of primordial non-Gaussianity (fNL) in the WMAP 3-year data at above 99.5% confidence
• Chaotic Inflation and Baryogenesis in Supergravity
• Preserving Flat Directions During Inflation
• Spread Supersymmetry
• Ultra-High Energy Cosmic Rays, Superheavy Long-Living Particles, and Matter Creation after Inflation
• Observational constraints on the curvaton model of inflation
• Non-linear isocurvature perturbations and non-Gaussianities
• Pseudonatural Inflation
• On the reheating stage after inflation
• Dynamics of oscillating scalar field in thermal environment
• Curvaton Dynamics
• The CDM isocurvature perturbation in the curvaton scenario
• The curvaton scenario in supersymmetric theories
• Non-Gaussianity from Curvatons Revisited
• Non-Gaussian Fingerprints of Self-Interacting Curvaton
• Fate of oscillating scalar fields in the thermal bath and their cosmological implications
• CMB Anisotropy from Baryogenesis by a Scalar Field
• The Subdominant Curvaton
• Right-Handed Sneutrinos as Curvatons
• Can oscillating scalar fields decay into particles with a large thermal mass?
• Non-Gaussianity and Baryonic Isocurvature Fluctuations in the Curvaton Scenario
• On the Role of Quasiparticles and thermal Masses in Nonequilibrium Processes in a Plasma

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• Domain wall and isocurvature perturbation problems in axion models
• Scalar Field Dark Matter Spectator During Inflation: The Effect of Self-interaction
• Fermionic Isocurvature Perturbations
• CDM/baryon isocurvature perturbations in a sneutrino curvaton model
• Hubble induced mass after inflation in spectator field models
• Peccei-Quinn Symmetric Pure Gravity Mediation
• Revised $f_{\mathrm{NL}}$ parameter in Curvaton Scenario
• Non-thermal Axion Dark Radiation and Constraints
• Large Scale Cosmic Perturbation from Evaporation of Primordial Black Holes
• Dynamically generated tilt of isocurvature fluctuations
• Unified Origin of Curvature Perturbation and Baryon Asymmetry of the Universe