3 papers
hep-th2026
Evading Cosmological Strong Coupling in Non-minimally Coupled Vector Gravity
Antonio De Felice, Seishi Enomoto, Nagisa Hiroshima +1
Recent analyses of Proca theories with non-minimal curvature couplings have uncovered an additional scalar degree of freedom with an identically vanishing propagation speed, $c_s^2…
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
Explosive production of Higgs particles and implications for heavy dark matter
Seishi Enomoto, Nagisa Hiroshima, Kohta Murase +1
It is widely believed that the parameter space for Higgs-portal dark matter that achieves the relic abundance through thermal freeze-out has already been tightly constrained, typic…