2 papers
hep-ph2024
Axion cogenesis without isocurvature perturbations
Raymond T. Co, Masaki Yamada
Axion rotations can simultaneously explain the dark matter abundance and the baryon asymmetry of the Universe by kinetic misalignment and axiogenesis. We consider a scenario in whi…
hep-ph2024
Multifield Stochastic Dynamics in GUT Hybrid Inflation and Gravitational Wave Signatures of GUT Higgs Representation
Yuichiro Tada, Masaki Yamada
We revisit the hybrid inflation model within the framework of the Grand Unified Theory (GUT), focusing on cases where the waterfall phase transition extends over several e-foldings…