385 citations · 3.7k across the 95 of their papers we have counts for
8 papers · 1 filter
Hidden Charged Dark Matter and Chiral Dark Radiation
P. Ko, Natsumi Nagata, Yong Tang
In the light of recent possible tensions in the Hubble constant and the structure growth rate between the Planck and other measurements, we investigate a hidden-charged…
Predictions for the neutrino parameters in the minimal gauged U(1) model
Kento Asai, Koichi Hamaguchi, Natsumi Nagata
We study the structure of the neutrino mass matrix in the minimal gauged U(1) model, where three right-handed neutrinos are added to the Standard Model in order to obta…
Low-Scale D-term Inflation and the Relaxion
Jason L. Evans, Tony Gherghetta, Natsumi Nagata +1
We present a dynamical cosmological solution that simultaneously accounts for the early inflationary stage of the Universe and solves the supersymmetric little hierarchy problem vi…
Starobinsky-like Inflation, Supercosmology and Neutrino Masses in No-Scale Flipped SU(5)
John Ellis, Marcos A. G. Garcia, Natsumi Nagata +2
We embed a flipped GUT model in a no-scale supergravity framework, and discuss its predictions for cosmic microwave background observables, which ar…
Higgsino Dark Matter or Not: Role of Disappearing Track Searches at the LHC and Future Colliders
Hajime Fukuda, Natsumi Nagata, Hidetoshi Otono +1
Higgsino in supersymmetric standard models is known to be a promising candidate for dark matter in the Universe. Its phenomenological property is strongly affected by the gaugino f…
Extending the LHC Reach for New Physics with Sub-Millimeter Displaced Vertices
Hayato Ito, Osamu Jinnouchi, Takeo Moroi +2
Particles with a sub-millimeter decay length appear in many models of physics beyond the Standard Model. However, their longevity has been often ignored in their LHC searches and t…