Chromo-Natural Inflation in the Axiverse

Abstract

We study chromo-natural inflation in the axiverse. More precisely, we investigate natural inflation with two axions coupled with a SU(2) gauge field. Assuming a hierarchy between the coupling constants, we find that for certain initial conditions, conventional natural inflation commences and continues for tens of e-foldings, and subsequently chromo-natural inflation takes over from natural inflation. For these solutions, we expect that the predictions are in agreement with observations on CMB scales. Moreover, since chromo-natural inflation occurs in the latter part of the inflationary stage, chiral primordial gravitational waves are produced in the interesting frequency range higher than $10^{-10}$Hz, which might be detectable by future gravitational wave observations.

16 pages, 3 figures

References in corpus (13)

• LIGO: The Laser Interferometer Gravitational-Wave Observatory
• Monodromy in the CMB: Gravity Waves and String Inflation
• Gravitational-wave sensitivity curves
• Chiral Primordial Gravitational Waves from a Lifshitz Point
• Circular Polarization of Primordial Gravitational Waves in String-inspired Inflationary Cosmology
• Natural inflation with multiple sub-Planckian axions
• Blue Tensor Spectrum from Particle Production during Inflation
• Anomalous CMB polarization and gravitational chirality
• Aligned Natural Inflation: Monodromies of two Axions
• Universal Constraints on Axions from Inflation
• Gauge-flation trajectories in Chromo-Natural Inflation
• Multi-Natural Inflation in Supergravity
• Chern-Simons EM-flation

Cited by in corpus (33)

• Scale-dependent gravitational waves from a rolling axion
• New physics from the polarised light of the cosmic microwave background
• Primordial Gravitational Waves from Axion-Gauge Fields Dynamics
• Sensitivity to a Frequency-Dependent Circular Polarization in an Isotropic Stochastic Gravitational Wave Background
• Cosmological window onto the string axiverse and the supersymmetry breaking scale
• Rolling axions during inflation: perturbativity and signatures
• Higgsed Chromo-Natural Inflation
• Chiral Primordial Gravitational Waves from Dilaton Induced Delayed Chromo-natural Inflation
• On the validity of the perturbative description of axions during inflation
• Parity-violating CMB correlators with non-decaying statistical anisotropy
• Probing circular polarization in stochastic gravitational wave background with pulsar timing arrays
• Higgsed Gauge-flation
• Nonlinear perturbations from axion-gauge fields dynamics during inflation
• Implications of Gravitational-wave Production from Dark Photon Resonance to Pulsar-timing Observations and Effective Number of Relativistic Species
• Oscillating Chiral Tensor Spectrum from Axionic Inflation
• A new mechanism to enhance primordial tensor fluctuations in single field inflation
• On Synthetic Gravitational Waves from Multi-field Inflation
• Axion-Gauge Field Dynamics with Backreaction
• Measuring Parity Asymmetry of Gravitational Wave Backgrounds with a Heliocentric Detector Network in the mHz Band
• On networks of space-based gravitational-wave detectors
• Statistically Anisotropic Tensor Modes from Inflation
• How attractive is the isotropic attractor solution of axion-SU(2) inflation?
• Footprint of Two-Form Field: Statistical Anisotropy in Primordial Gravitational Waves
• Generation of Primordial Black Holes and Gravitational Waves from Dilaton-Gauge Field Dynamics
• Anisotropic Hyperbolic Inflation
• Gravitational wave trispectrum in the axion-SU(2) model
• Gravitational waves detectable in laser interferometers from axion-SU(2) inflation
• Primordial gravitational wave phenomenology with polarized Sunyaev Zel'dovich tomography
• SU($N$)-natural inflation
• Misalignment production of vector boson dark matter from axion-SU(2) inflation
• Magnetogenesis from axion-SU(2) inflation
• Synthetic Gravitational Waves from a Rolling Axion Monodromy
• Perturbative limits on axion-SU(2) gauge dynamics during inflation from the energy density of spin-2 particles