3 papers
hep-ph2026
Inflaton Regeneration via Scalar Couplings: Generic Models and the Higgs Portal
Kunio Kaneta, Tomo Takahashi, Natsumi Watanabe
The standard cosmological paradigm assumes that the inflaton field becomes dynamically negligible during the post-reheating evolution of the Universe. We demonstrate that this assu…
hep-ph2025
Post-Reheating Inflaton Production as a Probe of Reheating Dynamics
Kunio Kaneta, Tomo Takahashi, Natsumi Watanabe
Cosmological reheating bridges the inflationary epoch and the hot big bang phase, yet its underlying dynamics remain poorly understood. In this work, we investigate a minimal scena…
hep-ph2024
Pseudo-Nambu-Goldstone Boson Production from Inflaton Coupling during Reheating
Kunio Kaneta, Sung Mook Lee, Kin-ya Oda +1
The existence of pseudo-Nambu-Goldstone boson (pNGB) fields is a common feature in many models beyond the Standard Model, characterized by their exclusive derivative couplings. Thi…