On: Natural Inflation

Abstract

We re-examine the original model of Natural inflation, in which the inflaton is a pseudo Nambu-Goldstone boson with potential of the form $V(\varphi )={\Lambda }^4[1\pm \cos (\varphi /f)]$, in light of recent data. We find that the model is alive and well. Successful inflation as well as recent data from the Wilkinson Microwave Anisotropy probe require $f>0.6m_{\mathrm{Pl}}$ (where $m_{\mathrm{Pl}}=1.22\times 10^{19}$ GeV) and $\Lambda \sim m_{GUT}$, scales which can be accommodated in particle physics models. The detectability of tensor modes from natural inflation in upcoming microwave background experiments is discussed. We find that natural inflation predicts a tensor/scalar ratio within reach of future observations.

19 pages, 1 figure, in press, PRD

References in corpus (13)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Inflation
• How long before the end of inflation were observable perturbations produced?
• On the Possibility of Large Axion Decay Constants
• High sensitivity measurements of the CMB power spectrum with the extended Very Small Array
• Closer towards inflation in string theory
• Double Field Inflation
• WMAPping inflationary physics
• WMAP and Inflation
• Cosmological parameter estimation using Very Small Array data out to l=1500
• Volume Stabilization and the Origin of the Inflaton Shift Symmetry in String Theory
• Little Inflatons and Gauge Inflation
• The energy scale of inflation: is the hunt for the primordial B-mode a waste of time?

Cited by in corpus (61)

• Chromo-Natural Inflation: Natural inflation on a steep potential with classical non-Abelian gauge fields
• Primordial Gravitational Waves from Axion-Gauge Fields Dynamics
• Perturbations in Chromo-Natural Inflation
• Stability analysis of chromo-natural inflation and possible evasion of Lyth's bound
• Axion Inflation with an SU(2) Gauge Field: Detectable Chiral Gravity Waves
• Impact of neutrino properties on the estimation of inflationary parameters from current and future observations
• Slow Roll Reconstruction: Constraints on Inflation from the 3 Year WMAP Dataset
• Natural Inflation: Consistency with Cosmic Microwave Background Observations of Planck and BICEP2
• Gauge-flation trajectories in Chromo-Natural Inflation
• Natural Inflation: status after WMAP 3-year data
• Low-Energy Effective Field Theory for Chromo-Natural Inflation
• Of pNGB QuiNtessence
• Chiral Gravity Waves and Leptogenesis in Inflationary Models with non-Abelian Gauge Fields
• Chromo-Natural Model in Anisotropic Background
• Non-Gaussianity from Axion-Gauge Fields Interactions during Inflation
• Warm natural inflation
• The Lyth Bound and the End of Inflation
• Gauss-Bonnet Inflation after Planck2018
• Parity Violating Statistical Anisotropy
• The inflationary gravitational-wave background and measurements of the scalar spectral index
• Natural Inflation: the status after WMAP 3-year data
• Chromo-Natural Inflation in the Axiverse
• The Higgs Boson can delay Reheating after Inflation
• Observational Constraints on Warm Natural Inflation
• Inflation from Geometrical Tachyons
• Introduction to Big Bang Nucleosynthesis and Modern Cosmology
• D-brane Potentials in the Warped Resolved Conifold and Natural Inflation
• Reheating in small-field inflation on the brane: The Swampland Criteria and observational constraints in light of the PLANCK 2018 results
• Chromo-Natural inflation in Supergravity
• Prospects for Direct Detection of Inflationary Gravitational Waves by Next Generation Interferometric Detectors
• Natural inflation at the GUT scale
• Geometrical Tachyon Kinks and NS5 Branes
• Inflation models in the light of self-interacting sterile neutrinos
• Slow-roll trajectories in Chromo-Natural and Gauge-flation Models, an exhaustive analysis
• Eliminating the eta-problem in SUGRA Hybrid Inflation with Vector Backreaction
• Kinetic Gravity Braiding and axion inflation
• Natural braneworld inflation and baryogenesis
• Non-thermal leptogenesis and baryon asymmetry in different neutrino mass models
• Universality of linear perturbations in SU($N$)-natural inflation
• A note on Low Energy Effective Theory of Chromo Natural Inflation in the light of BICEP2 results
• Gravitational waves detectable in laser interferometers from axion-SU(2) inflation
• Baryogenesis via leptogenesis in multi-field inflation
• Constraints on Brane-World Inflation from the CMB Power Spectrum: Revisited
• Large Density Perturbations from Reheating to Standard Model particles due to the Dynamics of the Higgs Boson during Inflation
• Hysteresis in the Sky
• Chaotic Brane Inflation
• Observational Status of Tachyon Natural Inflation and Reheating
• Modified natural inflation: A small single field model with a large tensor to scalar ratio
• Conformal Standard Model and Inflation
• The reheating constraints to natural inflation in Horndeski gravity
• Trans-Planckian censorship constraints on properties and cosmological applications of axion-like fields
• Effect of Dissipation on Warm Chromo-Natural Inflation
• Studying G-axion Inflation model in light of PLANCK
• Slow-roll inflation in $f\left(R,T,R_{ab}{T}^{ab}\right)$ gravity
• Thermal effects on warm chromoinflation
• Big Bang Nucleosynthesis, the CMB, and the Origin of Matter and Space-Time
• Cosmic strings and Natural Inflation
• Enlarging the Space of Viable Inflation Models: A Slingshot Mechanism
• Setting Initial Conditions for Inflation with Reaction-Diffusion Equation
• A Tachyon Field around the Black Hole
• Theoretical and observational aspects of cosmological inflation