A5055510113- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Nuclear reactor physics and engineering
- Particle accelerators and beam dynamics
- Medical Imaging Techniques and Applications
- Cancer Treatment and Pharmacology
- Quantum Chromodynamics and Particle Interactions
- Nuclear and radioactivity studies
- Nuclear Materials and Properties
- Muon and positron interactions and applications
- Scientific Research and Discoveries
- High-Energy Particle Collisions Research
- Quantum, superfluid, helium dynamics
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Radiation Therapy and Dosimetry
- Computational Physics and Python Applications
- Biofuel production and bioconversion
- Nuclear physics research studies
Tohoku University
2022-2024
Boston University
2019-2024
Pacific Northwest National Laboratory
2020-2024
Battelle
2024
Dauphin Island Sea Lab
2024
Campbell Collaboration
2018-2023
University of California, Irvine Medical Center
2023
The University of Tokyo
2023
Osaka Butsuryo University
2023
National Institutes for Quantum Science and Technology
2023
The KamLAND experiment has determined a precise value for the neutrino oscillation parameter Deltam21(2) and stringent constraints on theta12. exposure to nuclear reactor antineutrinos is increased almost fourfold over previous results 2.44 x 10(32) proton yr due longer livetime an enlarged fiducial volume. An undistorted nu[over]e energy spectrum now rejected at >5sigma. Analysis of above inverse beta decay threshold, including geoneutrinos, gives best fit...
We present new constraints on the neutrino oscillation parameters $/textyen Delta m^{2}_{21}$, theta_{12}$, and theta_{13}$ from a three-flavor analysis of solar KamLAND data. The data set includes acquired following radiopurity upgrade amounts to total exposure $3.49 \textyen times 10^{32}$ target-proton-year. Under assumption {\textyen it CPT} invariance, two-flavor (/textyen mbox{$\textyen theta_{13} = 0$}) yields best-fit values $\textyen tan^{2} theta_{12} 0.444^{+0.036}_{-0.030}$...
SNO+ is a large liquid scintillator-based experiment located 2km underground at SNOLAB, Sudbury, Canada. It reuses the Sudbury Neutrino Observatory detector, consisting of 12m diameter acrylic vessel which will be filled with about 780 tonnes ultra-pure scintillator. Designed as multipurpose neutrino experiment, primary goal search for neutrinoless double-beta decay (0$\nu\beta\beta$) 130Te. In Phase I, detector loaded 0.3% natural tellurium, corresponding to nearly 800 kg 130Te, an expected...
The Double Chooz experiment presents improved measurements of the neutrino mixing angle θ 13 using data collected in 467.90 live days from a detector positioned at an average distance 1050 m two reactor cores nuclear power plant. Several novel techniques have been developed to achieve significant reductions backgrounds and systematic uncertainties with respect previous publications, whereas efficiency $$ {\overline{\nu}}_e signal has increased. value is measured be sin2 2θ = 0.090 − 0.029 +...
The KamLAND-Zen experiment has provided stringent constraints on the neutrinoless double-beta (0νββ) decay half-life in ^{136}Xe using a xenon-loaded liquid scintillator. We report an improved search upgraded detector with almost double amount of xenon and ultralow radioactivity container, corresponding to exposure 970 kg yr ^{136}Xe. These new data provide valuable insight into backgrounds, especially from cosmic muon spallation xenon, have required use novel background rejection...
Radioactive isotopes produced through cosmic muon spallation are a background for rare-event detection in $\nu$ detectors, double-$\beta$-decay experiments, and dark-matter searches. Understanding the nature of cosmogenic backgrounds is particularly important future experiments aiming to determine pep CNO solar neutrino fluxes, which dominated by production $^{11}$C. Data from Kamioka liquid-scintillator antineutrino detector (KamLAND) provides valuable information better understanding these...
Abstract New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov scintillation signals. Such could reconstruct particle direction species using light while also having excellent energy resolution low threshold of scintillator detector. Situated deep underground, utilizing new techniques computing reconstruction, this achieve unprecedented...
We present the results of a search for extraterrestrial electron antineutrinos ('s) in energy range using KamLAND detector. In an exposure 4.53 kton-year, we identify 25 candidate events. All events can be attributed to background, most importantly neutral current atmospheric neutrino interactions, setting upper limit on probability 8B solar νe's converting into 's at 5.3 × 10−5 (90% CL), if assume undistorted shape. This corresponds flux 93 cm−2 s−1 or event rate 1.6 (kton − year)−1 above...
The SNO+ experiment is located 2 km underground at SNOLAB in Sudbury, Canada. A low background search for neutrinoless double beta (0νββ) decay will be conducted using 780 tonnes of liquid scintillator loaded with 3.9 natural tellurium, corresponding to 1.3 130Te. This paper provides a general overview the experiment, including detector design, construction process plants, commissioning efforts, electronics upgrades, data acquisition systems, and calibration techniques. collaboration reusing...
Interactions of 200-GeV/c protons and antiprotons on hydrogen, argon, xenon targets were studied with a streamer-chamber vertex spectrometer at the CERN SPS. Results multiplicities, rapidity distributions, correlations are presented compared predictions current models.
We report a measurement of the neutrino-electron elastic scattering rate from ${}^{8}$B solar neutrinos based on 123 kton-day exposure KamLAND. The background-subtracted electron recoil rate, above 5.5-MeV analysis threshold is 1.49 $\ifmmode\pm\else\textpm\fi{}$ 0.14(stat) 0.17(syst) events per kton-day. Interpreted as due to pure flavor flux with neutrino spectrum, this corresponds spectrum integrated 2.77 0.26(stat) 0.32(syst) $\ifmmode\times\else\texttimes\fi{}$10${}^{6}$...
The back scattering from water and several land terrains has been measured at wavelengths of 3.2 cm, 1.25 8.6 mm using vertical polarization only. σ°, the average radar cross section or echo per unit area surface, plotted as a function angle incidence for three wavelengths. A family curves each shows change in σ° with wind velocity surface. is also shown terrains. In general, increases frequency case
We report a measurement of the neutrino-electron elastic scattering rate 862 keV 7Be solar neutrinos based on 165.4 kton-day exposure KamLAND. The observed is 582 +/- 90 (kton-day)^-1, which corresponds to neutrino flux (3.26 0.50) x 10^9 cm^-2s^-1, assuming pure electron flavor flux. Comparing this with standard model prediction and further three mixing, nu_e survival probability 0.66 0.14 determined from KamLAND data. Utilizing global oscillation analysis, we obtain total (5.82 0.98)...
We report on a search for electron antineutrinos ($\bar{\nu}_e$) from astrophysical sources in the neutrino energy range 8.3 to 30.8 MeV with KamLAND detector. In an exposure of 6.72 kton-year liquid scintillator, we observe 18 candidate events via inverse beta decay reaction. Although there is large background uncertainty neutral current atmospheric interactions, find no significant excess over model predictions. Assuming several supernova relic spectra, give upper flux limits 60--110...
EOS is a technology demonstrator, designed to explore the capabilities of hybrid event detection technology, leveraging both Cherenkov and scintillation light simultaneously. With fiducial mass four tons, operate in high-precision regime, with sufficient size utilize time-of-flight information for full reconstruction, flexibility demonstrate range cutting edge technologies, simplicity design facilitate potential future deployment at alternative sites. Results from can inform neutrino...
The direction of individual <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mmultiscripts><a:mrow><a:mi mathvariant="normal">B</a:mi></a:mrow><a:mprescripts/><a:none/><a:mrow><a:mn>8</a:mn></a:mrow></a:mmultiscripts></a:mrow></a:math> solar neutrinos has been reconstructed using the <d:math xmlns:d="http://www.w3.org/1998/Math/MathML" display="inline"><d:mrow><d:mi>SNO</d:mi><d:mo>+</d:mo></d:mrow></d:math> liquid scintillator detector. Prompt, directional...
Abstract The SNO $$+$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mo>+</mml:mo> </mml:math> collaboration reports its first spectral analysis of long-baseline reactor antineutrino oscillation using 114 tonne-years data. Fitting the neutrino probability to observed energy spectrum yields constraints on mass-squared difference $$\Delta m^2_{21}$$ <mml:mrow> <mml:mi>Δ</mml:mi> <mml:msubsup> <mml:mi>m</mml:mi> <mml:mn>21</mml:mn> <mml:mn>2</mml:mn> </mml:msubsup> </mml:mrow>...
Abstract The electron antineutrino flux limits are presented for the brightest gamma-ray burst (GRB) of all time, GRB221009A, over a range 1.8–200 MeV using Kamioka Liquid Scintillator Antineutrino Detector. Using multiple time windows ranging from minutes to days surrounding event search antineutrinos coincident with GRB, we set an upper limit on under assumption several power-law neutrino source spectra, indices 1.5 3 in steps 0.5. No excess was observed any seconds around trigger T 0 ....
<h3>Objective:</h3> Causes of indeterminate results Western blot testing (IWB) for human immunodeficiency virus (HIV) type 1 include seroconversion, HIV-2 cross-reactivity, and autoimmune disease, but most IWB remain unexplained. This case-control study assessed risk factors results, including early HIV infection, other retroviral autoantibodies, medical conditions. <h3>Design:</h3> Prospective to determine seroconversion rate, with a design assess IWB. Cases (persons one or more repeatedly...
The recent development of Water-based Liquid Scintillator (WbLS), and the concurrent high-efficiency high-precision-timing light sensors, has opened up possibility for a new kind large-scale detector capable very broad program physics. would include determination neutrino mass hierarchy observation CP violation with long-baseline neutrinos, searches proton decay, ultra-precise solar measurements, geo- supernova neutrinos including diffuse antineutrinos, neutrinoless double beta decay. We...
The oscillation results published by the Double Chooz Collaboration in 2011 and 2012 rely on background models substantiated reactor-on data. In this analysis, we present a background-model-independent measurement of mixing angle θ13 including 7.53 days reactor-off A global fit observed antineutrino rates for different reactor power conditions is performed, yielding both total rate. are improved significantly data fit, as it provides direct This rate modulation analysis considers candidates...