Non-Gaussianity in the warm k-inflation

Abstract

This paper presents and investigates non-Gaussian perturbations for the warm k-inflation model that is driven by pure kinetic energy. The two complementary components of the overall non-Gaussianity are the three-point and four-point correlations. The intrinsic non-Gaussian component, denoted as the nonlinear parameter f_{NL}^{int}, is rooted in the three-point correlation for the inflaton field. Meanwhile, the δN part non-Gaussianity, denoted as f_{NL}^{δN}, is the contribution attributed to the four-point correlation function of the inflaton field. In this paper, the above two components in warm k-inflation are individually computed and analyzed. Then, comparisons and discussions between them are conducted, and the non-Gaussian theoretical results are compared with experimental observations to determine the range of model parameters within the allowable range of observation.

References in corpus (38)

• Cosmological parameters from SDSS and WMAP
• k-Inflation
• Observational Signatures and Non-Gaussianities of General Single Field Inflation
• Warm Inflation
• The inflationary prediction for primordial non-gaussianity
• Planck 2015 results. XVII. Constraints on primordial non-Gaussianity
• Super-Horizon Scale Dynamics of Multi-Scalar Inflation
• Thermally Induced Density Perturbations in the Inflation Era
• Warm Inflation and its Microphysical Basis
• Warm Inflation in the Adiabatic Regime- a Model, an Existence Proof for Inflationary Dynamics in Quantum Field Theory
• Detecting a small perturbation through its non-Gaussianity
• Warm Little Inflaton
• Evidence of early multi-strange hadron freeze-out in high energy nuclear collisions
• Thermal Properties of an Inflationary Universe
• A First Principles Warm Inflation Model that Solves the Cosmological Horizon/Flatness Problems
• Multi-brid inflation and non-Gaussianity
• Non-gaussianity from the second-order cosmological perturbation
• Primordial non-Gaussianity, scale-dependent bias, and the bispectrum of galaxies
• Density fluctuations from warm inflation
• Shear viscous effects on the primordial power spectrum from warm inflation
• Estimating non-gaussianity in the microwave background
• Non-gaussianity in fluctuations from warm inflation
• Non-Gaussian Signatures in the Cosmic Background Radiation from Warm Inflation
• Hadronic freeze-out following a first order hadronization phase transition in ultrarelativistic heavy-ion collisions
• Non-Gaussian perturbations from multi-field inflation
• Tachyon warm inflationary universe models
• Towards a reliable effective field theory of inflation
• Theory of non-Gaussianity in warm inflation
• Warm Little Inflaton becomes Cold Dark Matter
• Warm Little Inflaton becomes Dark Energy
• Shapes of non-Gaussianity in warm inflation
• Non-gaussianity in the strong regime of warm inflation
• Consistency of warm k-inflation
• Primordial non-Gaussianity in warm inflation using $\delta N$ formalism
• Perturbation spectra in the warm $k$-inflation
• Two models unifying warm inflation with dark matter and dark energy
• Supersymmetric Dirac-Born-Infeld Axionic Inflation and Non-Gaussianity
• Non-Gaussianity in a general kind noncanonical warm inflation

Cited by in corpus (2)

• Primordial non-Gaussianity in noncanonical warm inflation with nonminimal derivative coupling
• Dynamics of potential-free warm $\mathbf{k}$-inflation with nonminimal derivative coupling