2 papers
hep-ph2025
Gravitational Decays of Secluded Scalars and Graviton Dark Radiation
Kazunori Nakayama, Fuminobu Takahashi, Juntaro Wada
We discuss graviton dark radiation produced by the decay of a secluded scalar field that couples to the Standard Model (SM) only through gravity. Such scalar fields are long-lived,…
hep-ph2025
Dynamical Prevention of Topological Defect Formation
Junseok Lee, Kai Murai, Kazunori Nakayama +1
Topological defects can have significant cosmological consequences, so their production must be examined carefully. It is usually assumed that topological defects are produced if t…