3 papers
hep-ph2025
Cosmological Bounds on Scotogenic Model with Asymmetric Mediator
Kento Asai, Seishi Enomoto, Takuya Hirose +1
We study cosmological constraints on the asymmetric mediator scenario, a variant of the scotogenic model that addresses the origins of neutrino masses, dark matter (DM), and the ba…
hep-ph2025
Gauge symmetry breaking with extra dimensions
Kento Asai, Yuki Honda, Hiroki Ishikawa +2
We consider symmetry breaking of arbitrary gauge groups on a six-dimensional space-time which consists of a four-dimensional Minkowski space-time and a two-dimensional sphere…
hep-ph2025
An Analytic Prescription for -channel Singularities
Kento Asai, Nagisa Hiroshima, Joe Sato +2
The -channel singularity is a divergence in the scattering amplitude which occurs when a stable particle propagating in -channel scattering process becomes an on-shell state.…