A5114378467- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Astrophysics and Cosmic Phenomena
- Distributed and Parallel Computing Systems
- Nuclear physics research studies
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Muon and positron interactions and applications
- Advanced Data Storage Technologies
- Atomic and Subatomic Physics Research
- Medical Imaging Techniques and Applications
- Millimeter-Wave Propagation and Modeling
- Advancements in PLL and VCO Technologies
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Inorganic and Organometallic Chemistry
- advanced mathematical theories
- Particle accelerators and beam dynamics
High Energy Accelerator Research Organization
2016-2025
University of California, Santa Cruz
2017-2024
Federación Española de Enfermedades Raras
2024
University of Geneva
2023-2024
A. Alikhanyan National Laboratory
2024
SR Research (Canada)
2024
University of Manchester
2024
Atlas Scientific (United States)
2024
Nagoya City University
2023
The University of Adelaide
2014-2023
We present an analysis of atmospheric neutrino data from a 33.0 kton yr (535-day) exposure the Super-Kamiokande detector. The exhibit zenith angle dependent deficit muon neutrinos which is inconsistent with expectations based on calculations flux. Experimental biases and uncertainties in prediction fluxes cross sections are unable to explain our observation. consistent, however, two-flavor...
The first results of the solar neutrino flux measurement from Super-Kamiokande are presented. shown here obtained data taken between 31 May 1996, and 23 June 1997. Using our recoil electrons with energies above 6.5 MeV, we infer total ${}^{8}\mathrm{B}$ neutrinos to be $2.42\ifmmode\pm\else\textpm\fi{}0.06(\mathrm{stat}{)}_{\ensuremath{-}0.07}^{+0.10}(\mathrm{syst})\ifmmode\times\else\texttimes\fi{}{10}^{6}\mathrm{cm}{}^{\ensuremath{-}2}{\mathrm{s}}^{\ensuremath{-}1}$. This result is...
The previously published atmospheric neutrino data did not distinguish whether muon neutrinos were oscillating into tau or sterile neutrinos, as both hypotheses fit the data. Using recorded in 1100 live days of Super-Kamiokande detector, we use three complementary samples to study difference zenith angle distribution due neutral currents and matter effects. We find no evidence favoring reject hypothesis at 99% confidence level. On other hand, that oscillation between suffices explain all...
A total of 614 upward throughgoing muons minimum energy 1.6 GeV are observed by Super-Kamiokande during 537 detector live days. The measured muon flux is [1.74±0.07(stat)±0.02(sys)]×10−13cm−2s−1sr−1 compared to an expected [1.97±0.44(theor)]×10−13cm−2s−1sr−1. absolute in agreement with the prediction within errors. However, zenith-angle dependence does not agree no-oscillation predictions. distortion shape consistent νμ↔ντ oscillation hypothesis sin22θ>0.4 and 1×10−3<Δm2<1×10−1eV2 at 90%...
From an exposure of 25.5 kiloton-years the Super-Kamiokande detector, 900 muon-like and 983 electron-like single-ring atmospheric neutrino interactions were detected with momentum pe>100 MeV/c, pμ>200 visible energy less than 1.33 GeV. Using a detailed Monte Carlo simulation, ratio (μ/e)DATA/(μ/e)MC was measured to be 0.61±0.03(stat.)±0.05(sys.), consistent previous results from Kamiokande, IMB Soudan-2 experiments, smaller expected theoretical models production.
The flavor ratio of the atmospheric neutrino flux and its zenith angle dependence have been studied in multi-GeV energy range using an exposure 25.5 kiloton-years Super-Kamiokande detector. By comparing data to a detailed Monte Carlo simulation, (μ/e)DATA/(μ/e)MC was measured be 0.66±0.06(stat.)±0.08(sys.). In addition, strong distortion shape μ-like event distribution observed. number upward downward events found 0.52+0.07−0.06(stat.)±0.01(sys.), with expected value...
This paper introduces a new approach to measure the muon magnetic moment anomaly |$a_{\mu} = (g-2)/2$| and electric dipole (EDM) |$d_{\mu}$| at J-PARC facility. The goal of our experiment is |$a_{\mu}$| using an independent method with factor 10 lower momentum, 20 smaller diameter storage-ring solenoid compared previous ongoing |$g-2$| experiments unprecedented quality storage field. Additional significant differences from present experimental include 1000 transverse emittance beam...
A search for day-night variations in the solar neutrino flux resulting from oscillations has been carried out using 504 day sample of data obtained at Super-Kamiokande. The absence a significant variation set an absolute independent exclusion region two oscillation parameter space.
A measurement of the energy spectrum recoil electrons from solar neutrino scattering in Super-Kamiokande detector is presented. The results shown here were obtained 504 days data taken between 31 May 1996 and 25 March 1998. shape measured compared with expectation for ${}^{8}\mathrm{B}$ neutrinos. comparison takes into account both kinematic related effects process. spectral observation gives a ${\ensuremath{\chi}}^{2}$ 25.3 15 degrees freedom, corresponding to $4.6%$ confidence level.
The invariant mass spectra of e+e- pairs produced in 12 GeV proton-induced nuclear reactions are measured at the KEK Proton Synchrotron. On low-mass side meson peak, a significant enhancement over known hadronic sources has been observed. spectra, including excess, well reproduced by model that takes into account density dependence vector modification, as theoretically predicted.
Invariant mass spectra of e(+) e(-) pairs have been measured in 12 GeV p + A reactions to detect possible in-medium modification vector mesons. Copper and carbon targets are used study the nuclear-size dependence invariant distributions. significant excess on low-mass side phi meson peak is observed low betagamma(= beta/square root(1-beta(2))) region mesons (betagamma < 1.25) with copper targets. However, high betagamma > 1.25), spectral shapes well described by Breit-Wigner shape when...
We have searched for proton decay via p→e+π0 using data from a 25.5kton˙yr exposure of the Super-Kamiokande detector. find no candidate events with an expected background induced by atmospheric neutrinos 0.1 events. From these data, we set lower limit on partial lifetime τ/Bp→e+π0 to be 1.6×1033years at 90% confidence level.Received 19 May 1998DOI:https://doi.org/10.1103/PhysRevLett.81.3319©1998 American Physical Society
We present results of a search for proton decays, p→¯νK+, using data from 33kt˙yr exposure the Super-Kamiokande detector. Two decay modes kaon, K+→μ+νμ and K+→π+π0, were studied. The consistent with background expected atmospheric neutrinos; therefore lower limit on partial lifetime τ/B(p→¯νK+) was found to be 6.7×1032years at 90% confidence level.Received 22 February 1999DOI:https://doi.org/10.1103/PhysRevLett.83.1529©1999 American Physical Society
We measured the invariant mass spectra of electron-positron pairs in target rapidity region 12-GeV p+A reactions. have observed a significant difference below omega meson between p+C and p+Cu interactions. This indicates that spectral shape mesons is modified at normal nuclear-matter density.
The east-west anisotropy, caused by the deflection of primary cosmic rays in Earth's magnetic field, is observed for first time flux atmospheric neutrinos. Using a 45 kt yr exposure Super-Kamiokande detector, 552 $e$-like and 633 $\ensuremath{\mu}$-like horizontally going events are selected momentum range between 400 $3000\mathrm{MeV}/c$. azimuthal distributions agree with expectation from neutrino calculations, verifying that neutrinos GeV energy reasonably well modeled calculations...
Abstract Returned samples from Cb-type asteroid (162173) Ryugu exhibit very dark spectra in visible and near-infrared ranges, generally consistent with the Hayabusa2 observations. A critical difference is that a structural water absorption of hydrous silicates around twice as deep returned compared those Ryugu’s surface, suggesting surface more dehydrated. Here we use laboratory experiments data to indicate spectral differences between are best explained if has (1) higher porosity, (2)...
We report experimental results on the stability diagram of normal-roll pattern in electroconvection nematic liquid crystals. The stable wave-number bands normal rolls are determined for various frequencies applied voltage. find that mode destabilizing is zigzag type at low voltage and higher mainly skewed varicose type. change destablizing closely related to transition scenarios weak turbulence. With increasing amplitude external voltage, followed by a zigzaglike they breathing consisting...
Biomineralization inspired the development of simultaneous biological transformations and chemical precipitation for nitrogen removal phosphorus recovery from wastewater, which could compensate incapacity management in new route anaerobic ammonium oxidation (anammox). In this study, we strengthened anammox-mediated biomineralization by long-term feeding concentrated N, P, Ca substrates, a self-assembled matrix anammox bacteria hydroxyapatite (HAP) was fabricated granular shape, defined as...
An amplifier-shaper-discriminator (ASD) chip was designed and built for Thin Gap Chambers in the forward muon trigger system of LHC Atlas experiment. The ASD IC uses SONY Analog Master Slice bipolar technology. contains 4 channels a QFP48 package. gain its first stage (preamplifier) is approximately 0.8 V/pC output from preamplifier received by shaper (main-amplifier) with 7. baseline restoration circuit incorporated main-amplifier. threshold voltage discriminator section common to their...