782 citations · 4.2k across the 100 of their papers we have counts for
6 papers · 2 filters
Displaced vertices and long-lived charged particles in the NMSSM with right-handed sneutrinos
David G. Cerdeno, Victor Martin-Lozano, Osamu Seto
We study LHC signatures of displaced vertices and long-lived charged particles within the context of the Next-to-Minimal Supersymmetric Standard Model with right-handed (RH) sneutr…
Gamma ray emission in Fermi bubbles and Higgs portal dark matter
Nobuchika Okada, Osamu Seto
It has been recently pointed out that the excess of the gamma ray spectrum in the Fermi Bubbles at low latitude can be well explained by the annihilation of dark matter particles.…
Light Dirac right-handed sneutrino dark matter
Ki-Young Choi, Osamu Seto
We show that mostly right-handed Dirac sneutrino is a viable supersymmetric light dark matter candidate. While the Dirac sneutrino scattering with nuclei is dominantly through the…
Resonant leptogenesis with mild degeneracy
Naoyuki Haba, Osamu Seto, Yuya Yamaguchi
Under the assumption of hierarchical right-handed neutrino masses, masses of right-handed neutrinos must be larger than GeV in the standard thermal leptogenesis scenario, wh…
Isospin violating dark matter being asymmetric
Nobuchika Okada, Osamu Seto
The isospin violating dark matter (IVDM) scenario offers an interesting possibility to reconcile conflicting results among direct dark matter search experiments for a mass range ar…
Vector Higgs-portal dark matter and Fermi-LAT gamma ray line
Ki-Young Choi, Hyun Min Lee, Osamu Seto
We propose a renormalizable model for vector dark matter with extra U(1) gauge symmetry, which is broken by the VEV of a complex singlet scalar. When the singlet scalar has a quart…