2008/02/29 by Masahiro Kawasaki, Kazunori Nakayama
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.77.123524
published as Phys.Rev.D77:123524,2008 · 19 pages, 4 figures
arxiv created 2008/04/28 · openalex publication_date 2008/06/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We revisit inflationary cosmology of axion models in the light of recent developments on the inflaton decay in supergravity. We find that all the cosmological difficulties, including gravitino, axino overproduction, and axionic isocurvature fluctuation, can be avoided if the saxion field has large initial amplitude during inflation and decays before big bang nucleosynthesis.