269 citations · 1.6k across the 55 of their papers we have counts for
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Implications of Gravitational Waves for Supersymmetric Grand Unification
So Chigusa, Yuichiro Nakai, Jiaming Zheng
Supersymmetric grand unification based on is one of the most attractive paradigms in physics beyond the Standard Model. Inspired by the recent NANOGrav signal, we discuss…
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…
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…
Light Dark Photon Dark Matter from Inflation
Yuichiro Nakai, Ryo Namba, Ziwei Wang
We discuss the possibility of producing a light dark photon dark matter through a coupling between the dark photon field and the inflaton. The dark photon with a large wavelength i…
Strange Jet Tagging
Yuichiro Nakai, David Shih, Scott Thomas
Tagging jets of strongly interacting particles initiated by energetic strange quarks is one of the few largely unexplored Standard Model object classification problems remaining in…
Gravitational Waves from Primordial Magnetic Fields via Photon-Graviton Conversion
Tomohiro Fujita, Kohei Kamada, Yuichiro Nakai
We explore a novel process in the early Universe in which thermalized photons are converted into gravitons in the presence of strong primordial magnetic fields. It is found that th…