2 papers
hep-ph2026
High-Quality Axion Dark Matter without Isocurvature Problem
Masahiro Kawasaki, Jie Sheng, Tsutomu T. Yanagida
Axion dark matter in high-scale inflation is subject to the isocurvature constraint, since quantum fluctuations of the axion field during inflation may exceed the current CMB bound…
astro-ph.CO2024
Axion Curvaton Model for the Gravitational Waves Observed by Pulsar Timing Arrays
Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida +1
The stochastic gravitational wave background (SGWB) recently detected by the PTA collaborations could be the gravitational waves (GWs) induced by curvature perturbations. However,…