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hep-ph2025
On Non-Minimal Couplings to Gravity and Axion Isocurvature Bounds
Claire Rigouzzo, Sebastian Zell
For axions present during inflation, it has been shown that a non-minimal coupling of the inflaton to gravity worsens isocurvature bounds, while a non-minimal coupling $ξ_…
hep-ph2025
No Dark Matter Axion During Minimal Higgs Inflation
Claire Rigouzzo, Sebastian Zell
We study minimal versions of Higgs inflation in the presence of a massless QCD axion. While the inflationary energy scale of the metric variant is too high to accommodate isocurvat…