A5101551844- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Synthesis and Properties of Aromatic Compounds
- Radiation Detection and Scintillator Technologies
- Atomic and Molecular Physics
- Astrophysics and Cosmic Phenomena
- Advanced Chemical Physics Studies
- Fullerene Chemistry and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Astronomical and nuclear sciences
- Spectroscopy and Quantum Chemical Studies
- Nuclear reactor physics and engineering
- Radioactive Decay and Measurement Techniques
- Advanced NMR Techniques and Applications
- Quantum, superfluid, helium dynamics
- Nonlinear Optical Materials Research
- Particle Accelerators and Free-Electron Lasers
- Organic Electronics and Photovoltaics
Osaka University
1995-2024
Kyoto Sangyo University
2010-2024
Brookhaven National Laboratory
2008-2024
RIKEN BNL Research Center
2008-2024
Czech Technical University in Prague
2003-2016
Universidade de Santiago de Compostela
2014-2015
Kurchatov Institute
2014
Florida Institute of Technology
2008
RIKEN
2008
Nagoya University
1995-2008
The DONuT experiment collected data in 1997 and published first results 2000 based on four observed $ν_τ$ charged-current (CC) interactions. final analysis of the is presented this paper, $3.6 \times 10^{17}$ protons target using 800 GeV Tevatron beam at Fermilab. number CC interactions 9, from a total 578 neutrino We calculated energy-independent part tau-neutrino cross section ($ν+ \bar ν$), relative to well-known $ν_e$ $ν_μ$ sections. ratio $σ(ν_τ)$/$σ(ν_{e,μ})$ was found be...
The goal of the DIRAC experiment at CERN (PS212) is to measure $\pi^+\pi^-$ atom lifetime with 10% precision. Such a measurement would yield precision 5% on value $S$-wave $\pi\pi$ scattering lengths combination $|a_0-a_2|$. Based part collected data we present first result lifetime, $\tau=[2.91 ^{+0.49}_{-0.62}]\times 10^{-15}$ s, and discuss major systematic errors. This corresponds $|a_0-a_2|=0.264 ^{+0.033}_{-0.020} m_{\pi}^{-1}$.
The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and significantly improved the precision on its lifetime determination. From sample 21227 atomic pairs, 4% measurement S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_{-0.0078}|_\mathrm{stat}.{}^{+0.0078}_{-0.0073}|_\mathrm{syst})M_{\pi^+}^{-1}$ been attained, providing an important test Chiral Perturbation Theory.
Application of a large-volume NaI scintillator to search for the cold dark matter (DM) in Universe is discussed. A low-noise (\ensuremath{\sim}5 keV) and low-background (\ensuremath{\sim}5/keV kg day) were achieved even with large (36.5 kg) scintillator. Light output efficiencies $^{23}\mathrm{Na}$ $^{127}\mathrm{I}$ measured as 0.4\ifmmode\pm\else\textpm\fi{}0.2 0.05\ifmmode\pm\else\textpm\fi{}0.02, recoil energy range 5--100 keV 40--300 keV, respectively. shown have merits volume,...
Double beta decays (ββ) from the 0 + ground state in 116 Cd to Sn were studied by means of ELEGANT V. A finite half-life for two-neutrino ββ(2νββ) and an upper limit on neutrinoless one (0νββ) obtained as T 2ν 1/2 =2.6 +0.9 -0.5 ×10 19 y 0ν >6.3×10 21 (68% C.L.), respectively. The nuclear matrix element M ββ was deduced 0.069±0.009 units ( m e c 2 ) -1 . This supports universal quenching 2νββ rates this mass region, which is consistent with that previously measured 100 Mo.
A correlation experiment between inelastically scattered $^{3}\mathrm{He}$ particles at 1.2\ifmmode^\circ\else\textdegree\fi{} and decay $\ensuremath{\alpha}$ was performed in the giant-resonance region of $^{40}\mathrm{Ca}$ an incident energy 120 MeV. new ${0}^{+}$ state with 6% energy-weighted sum-rule strength observed ${E}_{x}=14.2$ Two broad resonances (quadrupole possibly octupole) were ${E}_{x}\ensuremath{\sim}18$ No resonant structure ${E}_{x}>20$
A high-sensitivity search for the strangeness $S\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}\ensuremath{-}2$ $H$ dibaryon $(\mathrm{uuddss})$ was conducted at Brookhaven Alternating Gradient Synchrotron (AGS) using reaction $^{3}H\mathrm{e}({K}^{\ensuremath{-}}{,K}^{+})\mathrm{Hn}$ ${P}_{{K}^{\ensuremath{-}}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1.8\mathrm{GeV}/c$. The sensitivity independent of lifetime and decay modes. No evidence production observed. In a mass range...
Measurements of angular distributions the cross sections and analyzing powers for elastic inelastic scatterings 65 MeV polarized protons from $^{12}\mathrm{C}$, $^{24}\mathrm{Mg}$, $^{28}\mathrm{Si}$, $^{32}\mathrm{S}$ are reported. Coupled channels analyses scattering data presented assuming ${0}_{1}^{+}$, ${2}_{1}^{+}$, ${4}_{1}^{+}$ states to be members ground band, ${0}_{2}^{+}$ state begin the\ensuremath{\beta} ${3}_{1}^{\mathrm{\ensuremath{-}}}$...
The singlet fission (SF) dynamics of pentacene linear aggregate models are investigated using the quantum master equation method by focusing on Frenkel excitonic (FE) coupling effects SF rate and double triplet (TT) yield as well their size dependences. It is found that for dimer model, unrealistically large FE couplings needed to provide significant dynamics, while larger a realistic causes variations in dynamics: increasing size, rapidly increases, attains maximum at 8-mer (~3 times...
We theoretically investigate significant impacts of diradical characters and exchange integrals on the first singlet (S1) triplet (T1) excitation energies related to fission (SF), from which a series C2h-symmetrically diazadibora-substituted anthracenes [(BN)2-anthracenes] are newly proposed as potential efficient SF chromophores. From analytical expressions electronic structures for model system with two electrons in orbitals, tuning represented by localized natural orbitals is shown be...
The results of a search for hydrogen-like atoms consisting $\pi^{\mp}K^{\pm}$ mesons are presented. Evidence $\pi K$ atom production by 24 GeV/c protons from CERN PS interacting with nickel target has been seen in terms characteristic pairs their breakup the same ($178 \pm 49$) and Coulomb final state interaction ($653 42$). Using these analysis yields first value lifetime $\tau=(2.5_{-1.8}^{+3.0})$ fs model-independent measurement S-wave isospin-odd scattering length...