236 citations · 2.1k across the 67 of their papers we have counts for
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Implications of neutrino species number and summed mass measurements in cosmological observations
N. Sasao, M. Yoshimura, M. Tanaka
We confront measurable neutrino degrees of freedom and summed neutrino mass in the early universe to particle physics at the energy scale beyond the standard model (B…
Generation of Twisted Gamma-Rays via Two-Photon Transition
Motomichi Tashiro, Noboru Sasao, Minoru Tanaka
We present a new and efficient method of generating twisted gamma rays utilizing highly accelerated helium-like ions; they are excited to a chosen state by irradiating two optical…
Alternative method of generating gamma rays with orbital angular momentum
Minoru Tanaka, Noboru Sasao
We propose a new method of generating gamma rays with orbital angular momentum (OAM). Accelerated partially-stripped ions are used as an energy up-converter. Irradiating an optical…
QED background against atomic neutrino process with initial spatial phase
Minoru Tanaka, Koji Tsumura, Noboru Sasao +2
Atomic deexcitation emitting a neutrino pair and a photon is expected to provide a novel method of neutrino physics if it is enhanced by quantum coherence in a macroscopic target.…
Neutrino mass spectroscopy using Er ions placed at inversion center of host crystals
H. Hara, N. Sasao, A. Yoshimi +1
We propose neutrino mass spectroscopy using Er:CsNaYF or :YO crystal placed in hollow of a Bragg fiber as a target system. Unknown neutrino parameters and pr…
Divalent lanthanoid ions in crystals for neutrino mass spectroscopy
H. Hara, N. Sasao, M. Yoshimura
Electron spin flip in atoms or ions can cause neutrino pair emission, which provides a method to explore still unknown important neutrino properties by measuring spectrum of emitte…