68 citations · 86 across the 5 of their papers we have counts for
20 papers
Supersymmetric Alignment Models for
Yuichiro Nakai, Matthew Reece, Motoo Suzuki
Hierarchical masses of quarks and leptons are addressed by imposing horizontal symmetries. In supersymmetric Standard Models, the same symmetries play a role in suppressing flavor…
Axion Quality from Superconformal Dynamics
Yuichiro Nakai, Motoo Suzuki
We discuss a possibility that a superconformal dynamics induces the emergence of a global symmetry to solve the strong CP problem through the axion. Fields spontane…
Gravitational Waves and Dark Radiation from Dark Phase Transition: Connecting NANOGrav Pulsar Timing Data and Hubble Tension
Yuichiro Nakai, Motoo Suzuki, Fuminobu Takahashi +1
Recent pulsar timing data reported by the NANOGrav collaboration may indicate the existence of a stochastic gravitational wave background around Hz. We explore a p…
Implications of Gravitational-wave Production from Dark Photon Resonance to Pulsar-timing Observations and Effective Number of Relativistic Species
Ryo Namba, Motoo Suzuki
The coherent oscillation of axionic fields naturally drives copious production of dark photon particles in the early universe, due to resonance and tachyonic enhancement. During th…
XENON1T Anomaly and its Implication for Decaying Warm Dark Matter
Gongjun Choi, Motoo Suzuki, Tsutomu T. Yanagida
An excess in the electronic recoil data was observed in the XENON1T detector. One of plausible explanations for the excess is absorption of a vector bosonic particle with the mass…
Inelastic Dark Matter Electron Scattering and the XENON1T Excess
Keisuke Harigaya, Yuichiro Nakai, Motoo Suzuki
Detection of electron recoils by dark matter (DM) may reveal the structure of the dark sector. We consider a scenario where a heavier DM particle inelastically scatters off an elec…