2 papers
astro-ph.CO2025
Production of gravitational waves by inflationary transitions in aligned natural inflation
Federico Greco
The original axion natural inflation model predicts a tensor-to-scalar ratio exceeding experimental limits. Conversely, in aligned axion inflation, inflation can proceed along traj…
astro-ph.CO2024
Analytic results in aligned axion inflation
Federico Greco, Marco Peloso
The original model of axion natural inflation produces a tensor-to-scalar ratio above the experimental limit. Aligned axion inflation admits inflationary trajectories that originat…