Pure Natural Inflation

Abstract

We point out that a simple inflationary model in which the axionic inflaton couples to a pure Yang-Mills theory may give the scalar spectral index (n_s) and tensor-to-scalar ratio (r) in complete agreement with the current observational data.

4 pages, 3 figures, published version

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• Oscillon of Ultra-Light Axion-like Particle
• Relating 't Hooft Anomalies of 4d Pure Yang-Mills and 2d ${\mathbb{CP}}^{N-1}$ Model
• Monodromy inflation at strong coupling: $4\pi$ in the sky
• WIMPflation
• Strongly Coupled Quintessence
• Efficient self-resonance instability from axions
• Axion assisted Schwinger effect
• Resonant magnetogenesis from axions
• ALP dark matter with non-periodic potentials: parametric resonance, halo formation and gravitational signatures
• Oscillons of Axion-Like Particle: Mass distribution and power spectrum
• Tensor Modes in Pure Natural Inflation
• Reheating constraints on modified single-field Natural Inflation models
• Is $N=2$ Large?
• Probing Oscillons of Ultra-Light Axion-like Particle by 21cm Forest
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• Anisotropies in Cosmological 21 cm Background by Oscillons/I-balls of Ultra-light Axion-like Particle
• Gauge Field Production and Schwinger Reheating in Runaway Axion Inflation
• Semiclassical analysis of axion-assisted and axion-driven pair production
• Dissipative Emergence of Inflation from Quasi-Cyclic Universe
• Dark photon dark matter from flattened axion potentials
• Pure Natural Quintessential Inflation and Dark Energy
• Large $\theta$ angle in two-dimensional large $N$ ${\mathbb{CP}}^{N-1}$ model