A5011851188- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Superconducting and THz Device Technology
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Astrophysics and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Atomic and Subatomic Physics Research
- Computational Physics and Python Applications
- Medical Imaging Techniques and Applications
- Radiation Detection and Scintillator Technologies
- Galaxies: Formation, Evolution, Phenomena
- Radiation Dose and Imaging
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Bipolar Disorder and Treatment
- Superconducting Materials and Applications
- Advanced X-ray and CT Imaging
- Precipitation Measurement and Analysis
- Solar and Space Plasma Dynamics
Saitama Prefecture
1972-2025
Kyoto University
2018-2024
University of Tsukuba
2023
Kirin (Japan)
2002-2022
High Energy Accelerator Research Organization
2008-2019
Tohoku University
2002-2019
Saitama Prefectural Education Center
2019
RIKEN Center for Advanced Photonics
2019
Saitama University
2019
The Graduate University for Advanced Studies, SOKENDAI
2012-2018
KamLAND has measured the flux of nu;(e)'s from distant nuclear reactors. We find fewer nu;(e) events than expected standard assumptions about propagation at 99.95% C.L. In a 162 ton.yr exposure ratio observed inverse beta-decay to number without disappearance is 0.611+/-0.085(stat)+/-0.041(syst) for energies >3.4 MeV. context two-flavor neutrino oscillations with CPT invariance, all solutions solar problem except "large mixing angle" region are excluded.
We present results of a study neutrino oscillation based on 766 ton-year exposure KamLAND to reactor anti-neutrinos. observe 258 \nuebar\ candidate events with energies above 3.4 MeV compared 365.2 expected in the absence oscillation. Accounting for 17.8 background events, statistical significance \nuebar disappearance is 99.998%. The observed energy spectrum disagrees spectral shape at 99.6% and prefers distortion from effects. A two-neutrino analysis data gives \DeltaMSq =...
Abstract We report an improved measurement of the cosmic microwave background B -mode polarization power spectrum with Polarbear experiment at 150 GHz. By adding new data collected during second season observations (2013–2014) to re-analyzed from first (2012–2013), we have reduced twofold band-power uncertainties. The band powers are reported over angular multipoles , where dominant signal is expected be due gravitational lensing E -modes. reject null hypothesis no a confidence 3.1 σ...
We constrain anisotropic cosmic birefringence using four-point correlations of even-parity $E$-mode and odd-parity $B$-mode polarization in the microwave background measurements made by POLARization Background Radiation (POLARBEAR) experiment its first season observations. find that signal from any parity-violating processes is consistent with zero. The Faraday rotation can be compared equivalent quantity generated primordial magnetic fields if they existed. POLARBEAR nondetection translates...
Data corresponding to a KamLAND detector exposure of 0.28 kton yr has been used search for nu;(e)'s in the energy range 8.3<E(nu;(e))<14.8 MeV. No candidates were found an expected background 1.1+/-0.4 events. This result can be obtain limit on nu;(e) fluxes any origin. Assuming that all flux its origin Sun and characteristic 8B solar nu(e) spectrum, we upper 3.7 x 10(2) cm(-2) s(-1) (90% C.L.) flux. We interpret this limit, 2.8 10(-4) standard model flux, framework spin-flavor precession...
We present improved measurements of $CP$-violation parameters in ${B}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}{K}^{0}$, ${\ensuremath{\eta}}^{\ensuremath{'}}{K}^{0}$, ${K}_{S}^{0}{K}_{S}^{0}{K}_{S}^{0}$ decays based on a sample $535\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $B\overline{B}$ pairs collected at the $\ensuremath{\Upsilon}(4S)$ resonance with Belle detector KEKB energy-asymmetric ${e}^{+}{e}^{\ensuremath{-}}$ collider. obtain...
The Q/U Imaging ExperimenT (QUIET) employs coherent receivers at 43GHz and 95GHz, operating on the Chajnantor plateau in Atacama Desert Chile, to measure anisotropy polarization of CMB. QUIET primarily targets B modes from primordial gravitational waves. combination these frequencies gives sensitivity foreground contributions diffuse Galactic synchrotron radiation. Between 2008 October 2010 December, >10,000hours data were collected, first with 19-element array (3458hours) then 90-element...
Article AbstractClick to enlarge pageDr. Calabrese began the meeting by saying that in management of7 bipolar disorder guidelines available for treating mania are fairly standard worldwide. However, depression vary, sometimes substantially, from country country. Therefore, primary aim of consensus group was discuss treatment I across different countries and develop a on international this phase illness. The sought formulate its recommendations basis clinical evidence, rather than relying...
The Q/U Imaging ExperimenT (QUIET) has observed the cosmic microwave background (CMB) at 43 and 95GHz. 43-GHz results have been published in QUIET Collaboration et al. (2011), here we report measurement of CMB polarization power spectra using 95-GHz data. This data set comprises 5337 hours observations recorded by an array 84 polarized coherent receivers with a total sensitivity 87 uK sqrt(s). Four low-foreground fields were observed, covering ~1000 square degrees effective angular...
LiteBIRD [Lite (Light) satellite for the studies of B-mode polarization and Inflation from cosmic background Radiation Detection] is a small to map microwave (CMB) radiation over full sky at large angular scales with unprecedented precision. Cosmological inflation, which leading hypothesis resolve problems in Big Bang theory, predicts that primordial gravitational waves were created during inflationary era. Measurements CMB are known as best probe detect waves. The working group authorized...
Abstract A collaborative international trial was conducted to evaluate the reproducibility and transferability of an in vivo mutation assay based on enumeration CD59‐negative rat erythrocytes, a phenotype that is indicative Pig‐a gene mutation. Fourteen laboratories participated this study, where anti‐CD59‐PE, SYTO 13 dye, flow cytometry were used determine frequency erythrocytes (RBC CD59− ) reticulocytes (RET ). To provide samples with range mutant cell frequencies, male rats exposed N...
The Q/U Imaging ExperimenT (QUIET) is designed to measure polarization in the Cosmic Microwave Background, targeting imprint of inflationary gravitational waves at large angular scales (~ 1 degree). Between 2008 October and 2010 December, two independent receiver arrays were deployed sequentially on a 1.4 m side-fed Dragonian telescope. polarimeters which form focal planes use highly compact design based High Electron Mobility Transistors (HEMTs) that provides simultaneous measurements...
POLARBEAR-2 (PB-2) is a cosmic microwave background (CMB) polarization experiment that will be located in the Atacama highland Chile at an altitude of 5200 m. Its science goals are to measure CMB signals originating from both primordial gravitational waves and weak lensing. PB-2 designed tensor scalar ratio, r, with precision {\sigma}(r) < 0.01, sum neutrino masses, {\Sigma}m{\nu}, {\sigma}({\Sigma}m{\nu}) 90 meV. To achieve these goals, employ 7588 transition-edge sensor bolometers 95 GHz...
We introduce and validate a delensing framework for the Simons Observatory (SO), which will be used to improve constraints on inflationary gravitational waves by reducing lensing noise in measurements of $B$ modes CMB polarization. SO initially observe using three small aperture telescopes one large-aperture telescope. While polarization maps from small-aperture constrain waves, internal delens reconstructed data Since obtained dominated subdegree scales, constructs template lensing-induced...
We search for the dark photon matter (DPDM) using a cryogenic millimeter-wave receiver. DPDM has kinetic coupling with electromagnetic fields constant of χ and is converted into ordinary photons at surface metal plate. signal this conversion in frequency range 18-26.5 GHz, which corresponds to mass 74-110 μeV/c^{2}. observed no significant excess, allowing us set an upper bound χ<(0.3-2.0)×10^{-10} 95% confidence level. This most stringent constraint date tighter than cosmological...
Abstract The Simons Observatory (SO) is a cosmic microwave background survey experiment that includes small-aperture telescopes (SATs) observing from an altitude of 5200 m in the Atacama Desert Chile. SO SATs will cover six spectral bands between 27 and 280 GHz to search for primordial B-modes sensitivity σ ( r ) = 0.002, with quantified systematic errors well below this value. Each SAT self-contained cryogenic telescope 35° field view, 42 cm diameter optical aperture, 40 K half-wave plate,...
Ultra-light dark matter candidates, such as axions and photons, particularly within the mass range of $\mu$eV to meV, have garnered significant research interest. However, effectiveness existing experiments is often hindered by narrow bandwidths conventional spectrometers. This study presents a novel spectrometer solution based on RFSoC, which integrates high-speed data converter, field programmable gate array (FPGA), CPU single chip. The spectrometer's logic implements an optimized fast...