A5008395491- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Solar and Space Plasma Dynamics
- Computational Physics and Python Applications
- Pulsars and Gravitational Waves Research
- Atmospheric Ozone and Climate
- Radio Wave Propagation Studies
- Second Language Learning and Teaching
- Ionosphere and magnetosphere dynamics
- Nuclear reactor physics and engineering
- Nuclear Physics and Applications
- Black Holes and Theoretical Physics
- Gyrotron and Vacuum Electronics Research
- Galaxies: Formation, Evolution, Phenomena
- Particle Accelerators and Free-Electron Lasers
Institute for Basic Science
2021-2025
Southern University and Agricultural and Mechanical College
2021-2024
University of Alaska Anchorage
2021-2024
Providence College
2021-2024
The University of Texas at Arlington
2021-2024
Kavli Institute for the Physics and Mathematics of the Universe
2024
The University of Tokyo
2016-2024
Clark Atlanta University
2021-2024
Institute for Cosmic Ray Research
2024
Miyagi University of Education
2024
This paper describes the physics case for a new fixed target facility at CERN SPS. The SHiP (Search Hidden Particles) experiment is intended to hunt in largely unexplored domain of very weakly interacting particles with masses below Fermi scale, inaccessible LHC experiments, and study tau neutrino physics. same proton beam setup can be used later look decays tau-leptons lepton flavour number non-conservation, $\tau\to 3\mu$ search weakly-interacting sub-GeV dark matter candidates. We discuss...
On the strength of a double Nobel prize winning experiment (Super)Kamiokande and an extremely successful long baseline neutrino programme, third generation Water Cherenkov detector, Hyper-Kamiokande, is being developed by international collaboration as leading worldwide based in Japan. The Hyper-Kamiokande detector will be hosted Tochibora mine, about 295 km away from J-PARC proton accelerator research complex Tokai, currently existing steadily upgraded to reach MW beam start experiment. A...
After important upgrades to the experiment, Super-Kamiokande collaboration returns measuring solar mixing angle and mass splitting $\mathrm{\ensuremath{\Delta}}\phantom{\rule{0}{0ex}}{m}_{12}^{2}$. By focusing on low-energy ${}^{8}B$ neutrinos, is able single out neutrinos that undergo flavor conversion only through vacuum oscillations. The results are currently most precise values for mass-difference parameters relevant neutrino
Super-Kamiokande (SK) can search for weakly interacting massive particles (WIMPs) by detecting neutrinos produced from WIMP annihilations occurring inside the Sun. In this analysis, we include neutrino events with interaction vertices in detector addition to upward-going muons surrounding rock. Compared previous result, which used only, signal acceptances light (few−GeV/c2−200−GeV/c2) WIMPs are significantly increased. We fit 3903 days of SK data contribution annihilation found no...
Hyper-Kamiokande will be a next-generation underground water Cherenkov detector with total (fiducial) mass of 0.99 (0.56) million metric tons, approximately 20 (25) times larger than that Super-Kamiokande. One the main goals is study |$CP$| asymmetry in lepton sector using accelerator neutrino and anti-neutrino beams. In this paper, physics potential long-baseline experiment beam from J-PARC proton synchrotron presented. The analysis uses framework systematic uncertainties derived ongoing...
An analysis of atmospheric neutrino data from all four run periods \superk optimized for sensitivity to the mass hierarchy is presented. Confidence intervals $\Delta m^2_{32}$, $\sin^2 \theta_{23}$, \theta_{13}$ and $\delta_{CP}$ are presented normal inverted hypotheses based on alone. Additional constraints reactor $\theta_{13}$ published binned T2K muon disappearance electron appearance added fit give enhanced above parameters. Over range parameters allowed at 90% confidence level, favored...
We have searched for proton decay via $p \rightarrow e^{+} \pi^{0}$ and \mu^{+} using Super-Kamiokande data from April 1996 to March 2015, 0.306 megaton$\cdot$years exposure in total. The atmospheric neutrino background rate IV is reduced almost half that of phase I-III by tagging neutrons associated with interactions. reach the lifetime further enhanced introducing new signal criteria select a hydrogen atom. No candidates were seen search. Two passed all selection been observed, but these...
Hyper-Kamiokande consists of two identical water-Cherenkov detectors total 520~kt with the first one in Japan at 295~km from J-PARC neutrino beam 2.5$^{\textrm{o}}$ Off-Axis Angles (OAAs), and second possibly Korea a later stage. Having detector would benefit almost all areas oscillation physics mainly due to longer baselines. There are several candidate sites baselines 1,000$\sim$1,300~km OAAs 1$^{\textrm{o}}$$\sim$3$^{\textrm{o}}$. We conducted sensitivity studies on for detector, either...
We report a measurement of the energy spectrum cosmic rays for energies above 2.5×1018 eV based on 215,030 events recorded with zenith angles below 60°. A key feature work is that estimates are independent assumptions about unknown hadronic physics or primary mass composition. The most precise made hitherto accumulated exposure being so large measurements flux dominated by systematic uncertainties except at 5×1019 eV. principal conclusions (1) flattening near 5×1018 eV, so-called "ankle,"...
The origin of high-energy cosmic rays, atomic nuclei that continuously impact Earth's atmosphere, has been a mystery for over century. Due to deflection in interstellar magnetic fields, rays from the Milky Way arrive at Earth random directions. However, near their sources and during propagation, interact with matter produce neutrinos. We search neutrino emission using machine learning techniques applied ten years data IceCube Neutrino Observatory. identify Galactic plane 4.5$σ$ level...
Abstract We present a measurement of the high-energy astrophysical muon–neutrino flux with IceCube Neutrino Observatory. The uses high-purity selection 650k neutrino-induced muon tracks from northern celestial hemisphere, corresponding to 9.5 yr experimental data. With respect previous publications, is improved by increased size event sample and extended model testing beyond simple power-law hypotheses. An updated treatment systematic uncertainties atmospheric background fluxes has been...
Abstract We discuss the sensitivity of bounds on spin-independent (SI) and spin-dependent (SD) WIMP-proton WIMP-neutron interaction couplings α SI,SD p,n WIMP velocity distribution for a massless mediator. update in Standard Halo Model (SHM) direct detection neutrino signal from annihilation Sun (fixing channel to bb̅ ), set halo-independent bound first time using single-stream method. In case mediator SHM capture rate diverges is regularized by removing contribution WIMPs locked into orbits...
A search for the solar neutrino effective magnetic moment has been performed using data from 1291.5 days exposure during second phase of Borexino experiment. No significant deviations expected shape electron recoil spectrum neutrinos have found, and a new upper limit on $\mu_{\nu}^{eff}$ $<$ 2.8$\cdot$10$^{-11}$ $\mu_{B}$ at 90\% c.l. set constraints sum fluxes implied by radiochemical gallium experiments.Using moment, limits moments flavor states, elements matrix Dirac Majorana neutrinos,...
Are there more than three types of neutrinos in nature ? Some experiments show that should exist at least one type, called sterile neutrinos. Using atmospheric neutrino data from the Super-Kamiokande experiment, authors find new limits on oscillations.
We report a measurement of the energy spectrum cosmic rays above 2.5×1018 eV based on 215 030 events. New results are presented: at about 1.3×1019 eV, spectral index changes from 2.51±0.03(stat)±0.05(syst) to 3.05±0.05(stat)±0.10(syst), evolving 5.1±0.3(stat)±0.1(syst) beyond 5×1019 while no significant dependence features declination is seen in accessible range. These can be reproduced models with energy-dependent mass composition. The density 5×1018 [5.66±0.03(stat)±1.40(syst)]×1053 erg...
We present the simultaneous measurement of interaction rates ${R}_{pp}$, ${R}_{\mathrm{Be}}$, ${R}_{pep}$ $pp$, $^{7}\mathrm{Be}$, and $pep$ solar neutrinos performed with a global fit to Borexino data in an extended energy range (0.19--2.93) MeV particular attention details analysis methods. This result was obtained by analyzing 1291.51 days Phase-II data, collected after extensive scintillator purification campaign. Using counts per day $(\mathrm{cpd})/100\text{ }\mathrm{ton}$ as unit, we...
We have searched for proton decay via $p \rightarrow \nu K^{+}$ using Super-Kamiokande data from April 1996 to February 2013, 260 kiloton$\cdot$year exposure in total. No evidence this mode is found. A lower limit of the lifetime set $5.9 \times 10^{33}$ years at 90% confidence level.
Neutrinos with energies above $10^{17}$ eV are detectable the Surface Detector Array of Pierre Auger Observatory. The identification is efficiently performed for neutrinos all flavors interacting in atmosphere at large zenith angles, as well Earth-skimming $\tau$ nearly tangential trajectories relative to earth. No neutrino candidates were found $\sim\,14.7$ years data taken up 31 August 2018. This leads restrictive upper bounds on their flux. $90\%$ C.L. single-flavor limit diffuse flux...
We present measurements of B+→¯¯¯D*0τ+ντ and B+→¯¯¯D0τ+ντ decays in a data sample 657×106 B¯¯¯B pairs collected with the Belle detector at KEKB asymmetric-energy e+e− collider. find 446+58−56 events significance 8.1 standard deviations, 146+42−41 3.5 deviations. The latter signal provides first evidence for this decay mode. measured branching fractions are B(B+→¯¯¯D*0τ+ντ)=(2.12+0.28−0.27(stat)±0.29(syst))% B(B+→¯¯¯D0τ+ντ)=(0.77±0.22(stat)±0.12(syst))%.Received 13 May...
A bstract Heavy Neutral Leptons (HNLs) are hypothetical particles predicted by many extensions of the Standard Model. These can, among other things, explain origin neutrino masses, generate observed matter-antimatter asymmetry in Universe and provide a dark matter candidate. The SHiP experiment will be able to search for HNLs produced decays heavy mesons travelling distances ranging between $$ \mathcal{O} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>O</mml:mi>...
We present a measurement of the charmless semileptonic decay $B^0\to\pi^-\ell^+\nu$ using data sample containing 657$\times 10^6$ $B\bar{B}$ events collected with Belle detector at KEKB asymmetric-energy $e^+e^-$ collider operating near $\Upsilon(4S)$ resonance. determine total branching fraction decay, $\mathcal{B}(B^0\to\pi^-\ell^+\nu)=(1.49\pm 0.04{(\mathrm{stat})}\pm 0.07{(\mathrm{syst})})\times 10^{-4}$. also report new precise differential rate, and extract Cabibbo-Kobayashi-Maskawa...