Yoshi Uchida
A5103879472- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Radiation Effects in Electronics
- Surface Roughness and Optical Measurements
- Muon and positron interactions and applications
- Noncommutative and Quantum Gravity Theories
- Semiconductor materials and devices
- Advanced Sensor Technologies Research
- Thin-Film Transistor Technologies
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Black Holes and Theoretical Physics
Imperial College London
2018-2024
The University of Tokyo
2021
Centre National de la Recherche Scientifique
2021
Laboratoire Leprince-Ringuet
2021
École Polytechnique
2021
Saint Thomas - Rutherford Hospital
2010
Massachusetts Institute of Technology
1998-1999
Background: Heavy charged particles after nuclear muon capture are an important physics background to the muon-to-electron conversion experiments Mu2e and COMET, which will search for lepton flavor violation at unprecedented level of sensitivity.Purpose: The AlCap experiment aimed measure yield energy spectra protons, deuterons, tritons, $\ensuremath{\alpha}$ emitted muons stopped in Al, Si, Ti low-energy range relevant experiments.Methods: Individual particle types were identified layered...
The COMET (COherent Muon to Electron Transition) Phase-I experiment aims search for muon electron conversion with a single event sensitivity of O (10−15). In COMET, Cylindrical Trigger Hodoscope (CTH), consisting segmented plastic scintillators, provides primary trigger signal and timing measurement while suppressing backgrounds under the high rate environment. This paper studies particle identification capability CTH suppress one serious induced by cosmic-rays. We demonstrated that...
Long-baseline neutrino oscillation experiments rely on detailed models of interactions nuclei. These constitute an important source systematic uncertainty, partially because detectors to date have been unable detect final state neutrons. A novel three-dimensional projection scintillator tracker will be a component the upgraded off-axis near detector T2K experiment. Due good timing resolution and fine granularity, this technology is capable measuring neutron kinematics in event-by-event basis...
The presentations, discussions and findings from the inaugural `PhyStat-$ν$' workshop held at Kavli Institute for Physics Mathematics of Universe (IPMU) near Tokyo in 2016 are described. PhyStat-$ν$ was first to focus solely on statistical issues across broad range modern neutrino physics, bringing together physicists who active analysis data with experts statistics explore field. It is a goal help serve physics community by providing forum within which such can be discussed disseminated...
Session I of the Neutrino Oscillation Workshop 2018 Conference, “Neutrino Oscillations: Present”, is summarised. Results were presented by currently-running long-baseline oscillation experiments T2K and NOvA, as well from accelerator OPERA MiniBooNE. Status reports results using short-baseline neutrinos (ICARUS MicroBooNE), atmospheric (Super-K, IceCube ANTARES), those reactors (Daya Bay Double Chooz), Sun Earth (Borexino) also presented. Our current knowledge neutrino parameters depends...
Detecting the Diffuse Supernova Neutrino Background at Super-Kamiokande requires designing state-of-the-art background removal technique to reject radioactivity induced by cosmic muon spallation, and identify atmospheric neutrino interactions. Identifying neutron produced interaction of DSNB antineutrinos would allow remove most these backgrounds, but is particularly challenging in pure water. With advent SK-Gd era, with Gadolinium being dissolved SK water, efficiency tagging procedure will...
The radioactivity background are among the most dangerous for low energy neutrino analysis in Super-Kamiokande (SK), like solar analysis. Among them, main contribution is coming from $^{222}$Rn, which spread detector's water due to source and photo multiplier (PMT) emanations. Up now, its exact distribution detector was not known. Using our knowledge of radon concentration water, SK-IV data, we developed a model detector. uncertainty on Rn associated with this estimated be $\sim0.1$ mBq/m$^{3}$
Super-Kamiokande (SK) is a 50-kt water Cherenkov detector, instrumented with $\sim 13$k photo-multipliers and running since 1996. It sensitive to neutrinos energies ranging from 4.5 MeV several TeV. A new framework has been developed for the follow-up of gravitational wave (GW) alerts issued by LIGO-Virgo collaboration (LVC). Neutrinos are searched for, using 1000-second time window centered on alert in both SK low-energy high-energy samples. Such observation can then be used constrain...