Quynh Vuong
A5025857379- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Quantum Chromodynamics and Particle Interactions
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Nuclear Physics and Applications
- Noncommutative and Quantum Gravity Theories
- Quantum, superfluid, helium dynamics
- Advanced NMR Techniques and Applications
- Particle accelerators and beam dynamics
University of Rochester
2024
Osaka University
2020-2021
The KOTO collaboration has now carefully analyzed widely discussed preliminary data containing four signal events for a rare kaon decay---an excess suggesting physics beyond the Standard Model---and found that Model background are large enough to explain signal.
We report the first search for $K_L \to \pi^0 \gamma$ decay, which is forbidden by Lorentz invariance, using data from 2016 to 2018 at J-PARC KOTO experiment. With a single event sensitivity of $(7.1\pm 0.3_{\rm stat.} \pm 1.6_{\rm syst.})\times 10^{-8}$, no candidate was observed in signal region. The upper limit on branching fraction set be $1.7\times 10^{-7}$ 90\% confidence level.