Non-gaussianity and cosmic uncertainty in curvaton-type models

Abstract

In curvaton-type models, observable non-gaussianity of the curvature perturbation would come from a contribution of the form $(\delta \sigma {)}^2$, where $\delta \sigma$ is gaussian. I analyse this situation allowing $\delta \sigma$ to be scale-dependent. The actual curvaton model is considered in more detail than before, including its cosmic uncertainty and anthropic status. The status of curvaton-type models after WMAP year three data is considered.

21 pages, wmap year three data considered

References in corpus (3)

• Non-gaussianity from the second-order cosmological perturbation
• Non-Gaussianity from Instant and Tachyonic Preheating
• Correlated isocurvature perturbations from mixed inflaton-curvaton decay

Cited by in corpus (25)

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• The curvature perturbation in a box
• Primordial Non-Gaussianities of General Multiple Field Inflation
• Simple Bounds from the Perturbative Regime of Inflation
• Broken Isotropy from a Linear Modulation of the Primordial Perturbations
• Large Non-Gaussianity Implication for Curvaton Scenario
• Diagrammatic approach to non-Gaussianity from inflation
• Non-gaussianity of inflationary field perturbations from the field equation
• Generating the Curvature Perturbation at the End of Inflation in String Theory
• Non-Gaussianity from massless preheating
• Non-Gaussian Inflationary Perturbations from the dS/CFT Correspondence
• Primordial Trispectrum from Entropy Perturbations in Multifield DBI Model
• Classicality of the primordial perturbations
• Hilltop Non-Gaussianity
• Non-Gaussianity from Symmetry
• Non-Gaussian corrections to the probability distribution of the curvature perturbation from inflation
• Second Order Gauge-Invariant Perturbations during Inflation
• Estimates of multipolar coefficients to search for cosmic ray anisotropies with non-uniform or partial sky coverage
• Cosmological perturbations from an inhomogeneous phase transition
• Non-standard kinetic term as a natural source of non-Gaussianity
• Generation of perturbation after multi-field inflation
• Primordial Black Holes in non-linear perturbation theory