A5087916826- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Nuclear physics research studies
- Infrastructure Maintenance and Monitoring
- Geophysical Methods and Applications
- Advanced Thermodynamic Systems and Engines
- Lipid Membrane Structure and Behavior
- Micro and Nano Robotics
- Quantum Chromodynamics and Particle Interactions
- Hemoglobin structure and function
- Ultrasonics and Acoustic Wave Propagation
- Radiation Detection and Scintillator Technologies
- Seismology and Earthquake Studies
- Anomaly Detection Techniques and Applications
- Erythrocyte Function and Pathophysiology
- Photoreceptor and optogenetics research
- Music and Audio Processing
- Microtubule and mitosis dynamics
- Vibrio bacteria research studies
- Quantum, superfluid, helium dynamics
- Atmospheric Ozone and Climate
Utsunomiya University
2014-2025
Network Technologies (United States)
2020
Saitama University
2007-2014
Osaka University
1998-2014
Nagoya University
2007-2013
Universitat de València
2009
Lancaster University
2009
University of Würzburg
2009
High Energy Accelerator Research Organization
2002-2007
Virginia Tech
2006
The coherent $\ensuremath{\mu}\ensuremath{-}e$ conversion rates in various nuclei are calculated for general lepton flavor violating interactions. We solve the Dirac equations numerically initial state muon and final electron Coulomb force, perform overlap integrations between wave functions nucleon densities. results indicate that branching ratio increases a light nucleus up to atomic number $Z\ensuremath{\sim}30,$ is largest $Z=30--60,$ becomes smaller heavy with $Z\ensuremath{\gtrsim}60.$...
We show simple methods of how to separate pure $\mathrm{CP}$-violating effects from matter in long baseline neutrino oscillation experiments with three generations neutrinos. give compact formulas for probabilities assuming one the masses (presumably ${\ensuremath{\nu}}_{\ensuremath{\tau}}$ mass) be much larger than other and effective mass due effect. Two are shown. One is observe envelopes curves as functions energy; a merit this method that only single detector enough determine presence...
The Technical Design for the COMET Phase-I experiment is presented in this paper. an at J-PARC, Japan, which will search neutrinoless conversion of muons into electrons field aluminium nucleus ($\mu-e$ conversion, $\mu^- N \to e^- N$); a lepton flavor violating process. experimental sensitivity goal process $3.1\times10^{-15}$, or 90 % upper limit branching ratio $7\times 10^{-15}$, factor 100 improvement over existing limit. expected number background events 0.032. To achieve target and...
Significance Bacterial pathogens manipulate host cellular processes using their own proteins. These proteins, so-called effectors, are injected into cells specialized nanomachines assembled on the bacterial cell surface. One such nanomachine, type IV secretion system (T4SS), is evolutionarily related to conjugation systems. We describe structure of T4SS core complex required for effector translocation and virulence in human pathogen Legionella pneumophila. The this larger more intricate than...
Modification of standard big-bang nucleosynthesis is considered in the minimal supersymmetric model to resolve excessive theoretical prediction abundance primordial lithium 7. We focus on stau as a next-lightest superparticle, which long lived due its small mass difference with lightest superparticle. It provides number additional decay processes $^{7}\mathrm{Li}$ and $^{7}\mathrm{Be}$. A particularly important process internal conversion stau-nucleus bound state, destroys $^{7}\mathrm{Be}$...
In Vibrio alginolyticus, the flagellar motor can rotate at a remarkably high speed, ca. three to four times faster than Escherichia coli or Salmonella motor. Here, we found Vibrio-specific protein, FlgT, in purified basal body fraction. Defects of FlgT resulted partial Fla⁻ and Mot⁻ phenotypes, suggesting that is involved formation structure generating rotation. Electron microscopic observation ΔflgT cells revealed smaller LP ring compared wild type, most T was lost. His₆-tagged could be...
Flagellar motility is a key factor for bacterial survival and growth in fluctuating environments. The polar flagellum of marine bacterium, Vibrio alginolyticus , driven by sodium ion influx rotates approximately six times faster than the proton-driven motor Escherichia coli . basal body has two unique ring structures, T H ring. These structures are essential proper assembly stator unit into to stabilize motor. FlgT, which flagellar protein specific sp., required form both structures. Here,...
Stimulated by the idea of PRISM, a very high intensity muon ring with rather low energy, we consider possibility observing $\mathrm{CP}$-violation effects in neutrino oscillation experiments. More than 10% can be seen within experimentally allowed region. The destructive sum matter effect and avoided use an initial ${\ensuremath{\nu}}_{\mathrm{}\mathrm{e}}$ beam. We finally show that experiment (a few) $\ifmmode\times\else\texttimes\fi{}100$ MeV energy km baseline length, which is considered...
A scenario of the big-bang nucleosynthesis is analyzed within minimal supersymmetric standard model, which consistent with a stau-neutralino coannihilation to explain relic abundance dark matter. We find that we can account for possible discrepancy $^{7}\mathrm{Li}$ between observation and prediction by taking mass neutralino as 300 GeV difference stau $(100--120)\text{ }\text{ }\mathrm{MeV}$. therefore simultaneously matter these values parameters. The lifetime staus in this predicted be...
Economic activities heavily rely on social infrastructure, such as bridges, tunnels, public structures, and buildings. In Japan, regular inspections are mandated by law to ensure these assets remain functional. This kind of requirement is rare worldwide. Similar regulations exist only in major cities the United States Canada. These often focus detecting issues that not visible naked eye, cavities within concrete walls. The most widely used method for hammering test, which inspectors analyze...
We study the effect of Higgs-exchange diagram for lepton flavor violating muon-electron conversion process in nuclei supersymmetric seesaw model. The contribution is significant a large value tan beta and small neutral heavy Higgs boson mass, which case ratio branching ratios B(mu N -> e N) / gamma) enhanced. also show that target atom dependence provides information on size exchange diagram.
We propose a new process of mu(-) e(-) -> in muonic atom for quest charged lepton flavor violation. The Coulomb attraction from the nucleus heavy leads to significant enhancement its rate, compared mu(+) e(+) e(-). upper limit branching ratio is estimated be orders O[10^(-17)-10^(-18)] photonic and four Fermi interactions present experimental constraints. search this could serve complementarily with other relevant processes shed lights upon nature
We study the sensitivity to CP/T-violation search in presence of ambiguities theoretical parameters. Three generations neutrinos are considered. The parameters whose considered differences squared masses, mixing angles, and density matter. first consider statistics that sensitive genuine CP-violation effect originating from imaginary coupling. No ambiguity is this part. It argued widely-adopted usual not necessarily effect. Two coupling proposed. qualitative difference between these one...
We calculate the relic density of stau at beginning Big-Bang Nucleosynthesis (BBN) era in coannihilation scenario minimal supersymmetric standard model (MSSM). In this scenario, can be long-lived and form bound states with nuclei. put constraints on parameter space MSSM by connecting calculation to observation light elements abundance, which strongly depends stau. Consistency between theoretical prediction observational result, both dark matter abundance requires mass difference lighter...
We propose helium-4 spallation processes induced by long-lived stau in supersymmetric standard models, and investigate an impact of the on light elements abundances. show that, as long phase space is open, they are more important than stau-catalyzed fusion hence constrain property.
We consider possibilities of observing T-violation effects in neutrino oscillation experiments with very long baseline (~ 10000 km) using low energy several hundreds MeV). show that the matter effect effectively changes only first-second generation mixing angle, respecting solar deficits and atmospheric anomalies. The effective Earth grows up to maximum by resonance. This enables one search T violation case angle is small. discuss its implications observations experiments.
To investigate the Na(+)-driven flagellar motor of Vibrio alginolyticus, we attempted to isolate its C-ring structure. FliG but not FliM copurified with basal bodies. proteins may be easily dissociated from body. We could detect on MS ring surface
The effects of matter density fluctuation in long baseline neutrino oscillation experiments are studied. Effects short wavelength fluctuations irrelevant. must be checked on a case-by-case basis. As an example we the and showed its irrelevance case K2K experiments.
We investigate the gauge-Higgs unification models within scheme of coset space dimensional reduction, beginning with a gauge theory in fourteen-dimensional spacetime where extra-dimensional has structure ten-dimensional compact space. found seventeen phenomenologically acceptable through an exhaustive search for candidates spaces, group fourteen dimension, and fermion representation. Of seventeen, ten led to SO(10) (× U(1)) GUT-like after three SU(5) ×U(1) models, four SU(3) × SU(2) U(1)...
The demand for inspections has increased due to the aging of concrete structures and tile wall surfaces. hammering test is a simple inspection method, but inspector needs much experience distinguishing sounds. Therefore, we developed device that automatically classifies sounds using deep learning. However, hardware with GPU learning one-board microcomputer, which no display, battery, or an input device, so cannot change settings check status during test. used smartphone instead...