Preprint
Sep 2026
Primordial Black Hole and Gravitational Wave by Peaked Cosmic Perturbations from Axion Curvaton
We demonstrate that an axion field can develop perturbations peaked at an intermediate wavenumber through its inflationary dynamics. We compute the resultant spectrum of gravitational waves (GWs) and primordial black holes (PBHs) generated through the curvaton mechanism. The GW spectrum exhibits a triangular shape, wit...
K. Harigaya, Lian-Tao Wang, Jiang Yi
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