12 citations · 19 across the 8 of their papers we have counts for
8 papers
Inelastic scalar dark matter and the LUX-ZEPLIN event
Nobuchika Okada, Osamu Seto
We show that our previously proposed inelastic scalar dark matter (DM) model in gauged symmetry naturally accounts for the high-energy recoil event recently rep…
Dark photon and U(1) gauge boson from dark Higgs boson decays at FASER and SHiP
Takeshi Araki, Kento Asai, Yohei Nakashima +3
We study the sensitivity to dark photons and U(1) gauge bosons produced via dark Higgs boson decays at the FASER and SHiP experiments. In addition to pair production of the…
Renormalization Group Running of the Minimal Leptophilic Dark Matter Model toward a UV Completion
Osamu Seto, Tetsuo Shindou, Takanao Tsuyuki
We study the renormalization group running of the coupling constants in a minimal leptophilic dark matter model in which a Standard Model singlet fermion, acting as the dark matter…
Smooth hybrid inflation in light of ACT DR6 data
Nobuchika Okada, Osamu Seto
Smooth hybrid inflation is a hybrid inflation model which is free from topological defects and predicts the density perturbation with the spectral index of about . We show th…
New rare meson decay constraints on a light vector in and the dark photon
Osamu Seto, Takashi Shimomura, Shinsuke Yoshida
We evaluate constraints from flavor changing rare meson decays to a light vector boson , followed by the decay of the on-shell into the SM fermions. The flavor changing meso…
Discovery potential of a long-lived partner of inelastic dark matter at MATHUSLA in extension of the standard model
Nobuchika Okada, Osamu Seto
We investigate the discovery potential at the MATHUSLA experiment of a long-lived particle (LLP), which is the heavier state of inelastic scalar dark matter (DM) in third generatio…
Stable dark matter from Pauli blocking in the degenerate fermion background with Quantum Field Theory
Wonsub Cho, Ki-Young Choi, Junghoon Joh +1
We study a mechanism to make dark matter stable based on the Pauli blocking in the fermion background. In the background where fermions occupy the states, the decay of dark matter…
Freeze-in sterile neutrino dark matter in a feebly gauged model
Osamu Seto, Takashi Shimomura, Yoshiki Uchida
We consider the gauged model and examine the situation where the sterile neutrino is a dark matter candidate produced by the freeze-in mechanism. In our model, the dar…