A5037413323- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Muon and positron interactions and applications
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Particle accelerators and beam dynamics
- Medical Imaging Techniques and Applications
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- International Science and Diplomacy
- Superconducting and THz Device Technology
- Radiation Therapy and Dosimetry
- Photonic and Optical Devices
- Algorithms and Data Compression
- Nuclear Physics and Applications
- Electron and X-Ray Spectroscopy Techniques
- Diverse Scientific and Economic Studies
Osaka Metropolitan University
2023-2024
Tokyo Metropolitan University
2023
Osaka City University
2012-2022
University of Michigan–Ann Arbor
2022
Institute for Theoretical and Experimental Physics
2021
National and Kapodistrian University of Athens
2011-2014
University of California, Los Angeles
2005-2014
Children's Defense Fund
1997-2013
University of Glasgow
2001-2013
University of Alberta
2013
We present an analysis of the discovery reach for supersymmetric particles at upgraded Tevatron collider, assuming that SUSY breaking results in universal soft parameters grand unification scale, and lightest particle is stable neutral. first a review literature, including issues unification, renormalization group evolution supersymmetry effect radiative corrections on effective low energy couplings masses theory. consider experimental bounds coming from direct searches those arising...
Power upgrades of accelerators and the development new beamlines have prompted high-precision measurements to be updated reveal phenomena. Several operate in mega-watt regime, a number experiments are planned for future, search evidence physics beyond standard model by investigating events relevant secondary particles. will constructed based on concepts high-power proton drivers, i.e., meson factories. These transport particles, namely muons, with higher efficiency than conventional...
Precise neutrino--nucleus interaction measurements in the sub-multi GeV region are important to reduce systematic uncertainty future neutrino oscillation experiments. Furthermore, excess of ${\nu_e}$ interactions, as a possible interpretation existence sterile has been observed such an energy region. The nuclear emulsion technique can measure all final state particles with low threshold for variety targets (Fe, C, H${_2}$O, and so on). Its sub-$\mu$m position resolution allows cross-section...
At the J-PARC muon facility (MUSE), new beamlines started operation recently. H-line is a high-intensity pulsed beamline for fundamental physics experiments. The first beam of was delivered to its branch (H1 area) in January 2022, where precise measurement muonium hyperfine structure and search μ-e conversion will be conducted. Further extension second g-2/EDM experiment transmission microscope project also ongoing. In addition, surface (S2 area S-line) opened 1S-2S spectroscopy FY2021. this...
We present searches for quark-lepton compositeness and a heavy W' boson at high electron-neutrino transverse mass. use ~110/pb of data collected in p-pbar collisions sqrt(s) = 1.8 TeV by the CDF collaboration during 1992--95. The are consistent with standard model expectations. Limits set on scale Lambda ratio partial cross sections sigma (W' -> e nu) / (W nu). The section is used to obtain lower limit mass couplings. We exclude < 2.81 below 754 GeV/c^2 95% confidence level. combine...
T. Koga1, N. Chikuma1, F. Hosomi1, M. Yokoyama1, A. Bonnemaison2, O. Drapier2, Ferreira2, Gonin2, Th. Mueller2, B. Quilain2, I. Aizenberg3, Izmaylov3, Karpikov3, Khabibullin3, Khotjantsev3, Y. Kudenko3, S. Martynenko3, Mefodiev3, Mineev3, Ovsjannikova3, Suvorov3, Yershov3, Hayashino4, K. Ichikawa4, Minamino4, Nakamura4, Nakaya4, Yoshida4, Seiya5, Wakamatsu5, Yamamoto5, Hayato6 1Department of Physics, University Tokyo, Bunkyo-ku, Japan 2IN2P3-CNRS, Ecole Polytechnique, Palaiseau, France...
We describe the first ever implementation of a clock-based, multi-stage emulsion shifter in an accelerator neutrino experiment. The system was installed monitoring building at Japan Proton Accelerator Research Complex as part test experiment, T60, and stable operation maintained for total 126.6 days. By applying time information to films, various results were obtained. Time resolutions 5.3–14.7 s evaluated spanning 46.9 days (yielding division numbers 1.4–3.8|$\times10^{5}$|). using timing...
A new experiment, called DeeMe, which is designed to search for μ−e conversions with a sensitivity of O(10−14), in preparation at the Japan Proton Accelerator Research Complex (J-PARC). It utilizes high-quality pulsed proton beam from Rapid Cycling Synchrotron J-PARC. The detector DeeMe must tolerate large pulses prompt charged particles whose instantaneous hit rate as 70 GHz mm−2 time width 200 ns, and detect single electron that arrives delayed timing on order microseconds. special wire...
High-energy physics experiments must usually handle large transfer rates of experimental data. In particular, in recent years, the amount and speed data handled high-energy have significantly increased, because signal waveforms from detectors are often recorded without reduction to maximize flexibility offline analysis. To best exploit available bandwidth such acquisition systems with waveform recording, we developed real-time lossless waveform-compression firmware that is based on a...
The T2K (Tokai-to-Kamioka) is a long baseline neutrino experiment designed to study various parameters that rule oscillations, with an intense beam of muon neutrinos. A near detector complex (ND280) used constrain non-oscillated flux and hence predict the expected number events in far (Super-Kamiokande). difference target material between (water) (scintillator, hydrocarbon) detectors leads main non-canceling systematic uncertainty for oscillation analysis. In order reduce this new water grid...
A new experiment, named WAGASCI can precisely measure the ratio of muon neutrino cross sections between water and hydrocarbon for charged-current interactions with a large angular acceptance at J-PARC. detector mainly consists two target modules modules. Each module is composed scintillators aligned in 3D grid-like structure having almost 4π solid angle acceptance. scintillator has groove WLS fiber to be put on, they are glued optical cement by using semi-automated gluing system. fibers...
Upgrade work towards increasing the beam intensity of neutrino production beamline at J-PARC is underway. Tertiary muon monitoring essential for stable operation beamline. Accordingly, we are planning to replace present monitor detectors with electron multiplier tubes (EMTs). We investigated linearity and radiation tolerance EMTs using a 90 MeV Research Center Electron Photon Science. show higher than Si sensors which presently used as one T2K long-baseline oscillation experiment J-PARC. The...
Abstract Upgrade work towards increasing the beam intensity of neutrino beamline at Japan Proton Accelerator Research Complex (J-PARC) is underway. Monitoring tertiary muon beams essential for stable operation beamline. Accordingly, we plan to replace present monitor sensors with electron multiplier tubes (EMTs). We investigated radiation tolerance and linearity response EMTs using a 90 MeV beam. were irradiated electrons up 470 nC. show higher than Si which are presently used as one...
WAGASCI is a new experiment at J-PARC neutrino beamline, to measure the cross section ratio of charged current interaction on nucleus between water target and plastic with accuracy few percent. The detector adopts three-dimensional grid structure 3-mm-thick scintillator bars around targets, obtain large angular acceptance. As photodetector 32-channel arrayed MPPC has been developed for detector, total number channels 1280 each module. Our front-end electronics SPIROC2D, product Omega, which...
It is considered that muon-electron conversion would be one of the most obvious evidence new physics beyond standard model.An experimental search for in nuclear field, DeeMe, proposed at J-PARC Materials and Life Science Experimental Facility (MLF).DeeMe experiment will carried out a brand-new beamline (H-Line) which constructed MLF Muon Establishment (MUSE).The single event sensitivity achieved by with current graphite production target MUSE estimated to 1.2 × 10 -13 .This smaller than...
We describe the first ever implementation of an emulsion multi-stage shifter in accelerator neutrino experiment. The system was installed monitor building J-PARC as a part test experiment T60 and stable operation maintained for total 126.6 days. By applying time information to films, various results were obtained. Time resolutions 5.3 14.7 s evaluated spanning 46.9 days (time resolved numbers 3.8--1.4$\times10^{5}$). using timing spatial information, reconstruction coincident events that...