A5050812807- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- High-Energy Particle Collisions Research
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Particle Detector Development and Performance
- Advanced NMR Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Dark Matter and Cosmic Phenomena
- Nuclear Physics and Applications
- Neutrino Physics Research
- Magnetic confinement fusion research
- Hydrocarbon exploration and reservoir analysis
- Bluetooth and Wireless Communication Technologies
- Marine and environmental studies
- Cholinesterase and Neurodegenerative Diseases
- Alzheimer's disease research and treatments
- Rocket and propulsion systems research
- Advanced Data Storage Technologies
- Cold Atom Physics and Bose-Einstein Condensates
- Aerospace Engineering and Control Systems
- Atmospheric Ozone and Climate
National Center of Neurology and Psychiatry
2025
Kyoto University
2016-2024
Osaka Electro-Communication University
2019-2024
Tokyo Institute of Technology
2022
Pioneer (Japan)
2021
RIKEN
2021
Tohoku University
2007
Kogakuin University
2004
We observed a distinct peak in the Λp invariant mass spectrum of He3(K−,Λp)n, well below mK+2mp, i.e., threshold K− to be bound two protons. By selecting relatively large momentum-transfer region q=350∼650 MeV/c, one can kinematically separate from quasi-free process, K‾N→K‾N followed by non-resonant absorption spectator-nucleons K‾NN→ΛN. found that simplest fit gives us Breit–Wigner pole position at BKpp=47±3(stat.)−6+3(sys.) MeV having width ΓKpp=115±7(stat.)−20+10(sys.) MeV, and S-wave...
We have performed an exclusive measurement of the K−+He3→Λpn reaction at incident kaon momentum 1GeV/c. In Λp invariant mass spectrum, a clear peak was observed below threshold K¯+N+N, as signal kaonic nuclear bound state, K¯NN. The binding energy, decay width, and S-wave Gaussian form factor this state were to be BK=42±3(stat.)−4+3(syst.)MeV, ΓK=100±7(stat.)−9+19(syst.)MeV, QK=383±11(stat.)−1+4(syst.)MeV/c, respectively. total production cross section K¯NN, determined by its mode,...
ABSTRACT Animal models of Alzheimer's disease ( AD ) are essential for developing therapeutics and evaluating the efficacy new drug candidates. Positron emission tomography (PET) is a useful method to monitor major hallmark onset , namely, deposition amyloid β peptide (Aβ) in brain. [ 18 F]FC‐119S 1 ), 2‐pyridylbenzothiazole analog, has been applied as radiotracer PET visualization Aβ plaques an model, 5xFAD mouse. Here, we present alternative automated synthesis F‐labeled our animal...
The report summarizes the results of activities Working Group on Event Generators for WW Physics at CERN during 1995.
We measured a set of $\pi^\pm\Sigma^\mp$, $\pi^0\Sigma^0$, and $\pi^-\Sigma^0$ invariant mass spectra below above the $\bar{K}N$ threshold in $K^-$-induced reactions on deuteron. deduced $S$-wave $\bar{K}N\rightarrow\pi\Sigma$ $\bar{K}N\rightarrow\bar{K}N$ scattering amplitudes isospin 0 channel framework $\pi\Sigma$ coupled channel. find that resonance pole corresponding to $\Lambda(1405)$ is located at 1417.7$^{+6.0}_{-7.4}$(fitting errors)$^{+1.1}_{-1.0}$(systematic errors) +...
We observed a distinct peak in the $\Lambda p$ invariant mass spectrum of $^{3}{\rm He}(K^-, \, \Lambda p)n$, well below threshold $m_K + 2 m_p$. By selecting relatively large momentum-transfer region $q = 350 \sim 650$ MeV/$c$, one can clearly separate from quasi-free process, $\overline{K}N \rightarrow \overline{K}N$ followed by non-resonant absorption two spectator-nucleons $\overline{K}NN N $. found that simplest fit to gives us Breit-Wigner pole position at $B_{\rm {\it Kpp}} 47 \pm 3...
Abstract. We measured πE invariant mass spectra below and above the K¯N threshold in K − d → NπE reaction order to study interaction Λ(1405) resonance. This can be described by two-step process: (i) 1 followed (ii) 2 πΣ, where N are nucleons bound deuteron. deduced S -wave scattering amplitude of framework πΣ coupled channel so as reproduce observed π Σ I = 0 channel. found a resonance pole at 1417.7 -7.4 +6.0 (fitting error) -1.0 +1.1 (systematic - i[26.9 -7.9 -2.0 +1.7 error)]MeV/ c .
The structure of the Λ(1405) hyperon is an important and long-standing issue related to K̄-nucleus interaction. J-PARC E31 experiment has been performed investigate spectrum shape. Because it hard form directly by a K̄N scattering in free space, uses d(K−, n) reaction with incident kaon momentum 1 GeV/c. We will identify three final states - Σ−π+, Σ+π−, Σ0π0-so that isospin resonance produced can be decomposed. first physics run was 2016. To enhance statistics data set, we have second...
The K¯NN bound system, symbolically denoted as "K−pp", is the simplest K¯-nuclear system which has been widely discussed a consequence of strongly attractive K¯N interaction in I = 0 channels. Many theoretical works have pointed out existence "K−pp" but calculated properties such binding energy and width spread due to uncertainty below K¯+N mass threshold. Experimentally, there are several reports on observation candidate with around 100 MeV, however, no definitive evidence was available so...
This paper describes a differential ionization chamber system which measures wide-range concentration of tritium gas without being affected by the contamination wall. Since is easily adsorbed to or into wall, detection level raised. The consists spherical and cylindrical chamber. inner walls two chambers are made same material have identical surface areas.With this pair chambers, it possible cancel currents, produced β-rays from accumulated on Experiments show that gas-borne can be measured...
We have searched for the simplest kaonic nuclear state, K¯NN, using in-flight 3He (K−, n) reaction at J-PARC hadron experimental facility. In semi-inclusive neutron missing-mass spectrum θnlab=0°, an excess of yield was observed just below K− pp mass-threshold, which cannot be explained by any elementary reactions [PTEP 2015, 061D01]. To understand X, we investigated hydrogen and deuterium targets. The p X well described charge-exchange reaction. However, in d spectrum, similar to that spectrum.