A5076005470- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Computational Physics and Python Applications
- Neutrino Physics Research
- Medical Imaging Techniques and Applications
- Advanced NMR Techniques and Applications
- Nuclear reactor physics and engineering
- Black Holes and Theoretical Physics
- Magnetic confinement fusion research
- Astrophysics and Cosmic Phenomena
- Radioactivity and Radon Measurements
- Radiation Therapy and Dosimetry
- Scientific Computing and Data Management
- Muon and positron interactions and applications
- Advanced X-ray Imaging Techniques
Korea University
2015-2024
Hanyang University
2024
Universidad de Salamanca
2018
Ohio University
2017
Korea Research Institute of Standards and Science
2017
Campbell Collaboration
2006-2017
Japan Atomic Energy Agency
2017
Pusan National University
2005-2014
Jeonbuk National University
2013-2014
Busan National University of Education
2008
The RENO experiment has observed the disappearance of reactor electron antineutrinos, consistent with neutrino oscillations, a significance 4.9 standard deviations. Antineutrinos from six 2.8 GW(th) reactors at Yonggwang Nuclear Power Plant in Korea, are detected by two identical detectors located 294 and 1383 m, respectively, array center. In 229 d data-taking period between 11 August 2011 26 March 2012, far (near) detector 17102 (154088) antineutrino candidate events background fraction...
Differential cross sections and photon beam asymmetries for the gamma p rightarrow K+ Lambda Sigma0 reactions have been measured in energy range from 1.5 GeV to 2.4 angular Theta_{cm} = 0 60 of scattering angle center mass system at SPring-8/LEPS facility. The both found be positive increase with energy. differential agree data by CLAS collaboration cosTheta_{cm}<0.9 within experimental uncertainties, but discrepancy SAPHIR K+Lambda reaction is large cosTheta_{cm}>0.9. In reaction,...
The photo-production of ϕ mesons from Li, C, Al, and Cu at forward angles has been measured Eγ=1.5–2.4GeV. number events for incoherent is found to have a target mass dependence A0.72±0.07 in the kinematical region |t|⩽0.6GeV2/c2. total cross section ϕ–nucleon interaction, σϕN, estimated as 35−11+17mb using A-dependence yield Glauber-type multiple scattering theory. This value much larger than σϕN free space, suggesting that properties might change nuclear medium.
The first dedicated search for the rare neutral-kaon decay $K_L^0\to\pi^0\nu\bar{\nu}$ has been carried out in E391a experiment at KEK 12-GeV proton synchrotron. final upper limit of 2.6 $\times 10^{-8}$ 90% confidence level was set on branching ratio decay.
Differential cross sections for γp→K+Λ(1405) and γp→K+Σ0(1385) reactions have been measured in the photon energy range from 1.5 to 2.4 GeV angular of 0.8<cos(Θ)<1.0 K+ scattering angle center-of-mass system. This data is first measurement Λ(1405) photoproduction section. The line shapes Σ+π− Σ−π+ decay modes were different with each other, indicating a strong interference isospin 0 1 terms Σπ amplitudes. ratios production Σ0(1385) two ranges: near threshold (1.5<Eγ<2.0 GeV) far it...
A search for $K^-pp$ bound state (the lightest kaonic nucleus) has been performed using the $\gamma d \rightarrow K^+ \pi^- \rm{X}$ reaction at E$_\gamma$=1.5-2.4 GeV LEPS/SPring-8. The differential cross section of $K^+ \pi^-$ photo-production off deuterium measured first time in this energy region, and a bump structure was searched inclusive missing mass spectrum. statistically significant not observed region from 2.22 to 2.36 GeV/$c^2$, upper limits production were determined be 0.1$-$0.7...
Abstract A series of data samples was collected with the Belle II detector at SuperKEKB collider from March 2019 to June 2022. We determine integrated luminosities these using three distinct methodologies involving Bhabha ( ), digamma and dimuon ) events. The total luminosity obtained Bhabha, digamma, events is (426.88 ± 0.03 2.61) fb −1 , (429.28 2.62) (423.99 0.04 3.83) where first uncertainties are statistical second systematic. resulting combination methods (427.87 2.01) .
Using data samples of 102 million Upsilon(1S) events and 158 Upsilon(2S) collected by the Belle detector at KEKB asymmetric-energy e+e- collider, we search for [udsccbar] pentaquark states decaying to Jpsi Lambda. first observations Upsilon(1S, 2S) inclusive decays Lambda, find evidence P_ccbars(4459)0 state with a significance 3.3 standard deviations, including statistical systematic uncertainties. We measure mass width Pccbars(4459)0 be (4471.7 +- 4.8 0.6) MeV/c2 (21.9 13.1 2.7) MeV,...
Beam polarization asymmetries for the p(gamma-->,K+)Lambda and p(gamma-->,K+)Sigma(0) reactions are measured first time E(gamma)=1.5-2.4 GeV 0.6<cos((theta(c.m.)(K+))<1.0 by using linearly polarized photons at Laser-Electron-Photon facility SPring-8 (LEPS). The observed positive gradually increase with rising photon energy. data not consistent theoretical predictions based on tree-level effective-Lagrangian approaches. Including new results in development of models is, therefore, crucial...
Photoproduction of a phi meson on protons was studied by means linearly polarized photons at forward angles in the low-energy region from threshold to Egamma = 2.37 GeV. The differential cross sections t -|t|min do not increase smoothly as increases but show local maximum around 2.0 angular distributions demonstrate that mesons are photoproduced predominantly helicity-conserving processes, and is likely due unnatural-parity processes.
We report the first observation of spontaneous polarization $\mathrm{\ensuremath{\Lambda}}$ and $\overline{\mathrm{\ensuremath{\Lambda}}}$ hyperons transverse to production plane in ${e}^{+}{e}^{\ensuremath{-}}$ annihilation, which is attributed effect arising from a polarizing fragmentation function. For inclusive $\mathrm{\ensuremath{\Lambda}}/\overline{\mathrm{\ensuremath{\Lambda}}}$ production, we also results with subtracted feed-down contributions ${\mathrm{\ensuremath{\Sigma}}}^{0}$...
We report the first measurement of $D^{\ast -}$ meson polarization in decay $B^0 \to D^{*-} \tau^+\nu_{\tau}$ using full data sample 772$\times 10^6$ $B\bar{B}$ pairs recorded with Belle detector at KEKB electron-positron collider. Our result, $F_L^{D^\ast} = 0.60 \pm 0.08 ({\rm stat}) 0.04 sys})$, where $F_L^{D^\ast}$ denotes $D^{\ast-}$ longitudinal fraction, agrees within about $1.7$ standard deviations model prediction.
Using data recorded with the Belle detector, we observe a new excited hyperon, an Ω^{*-} candidate decaying into Ξ^{0}K^{-} and Ξ^{-}K_{S}^{0} mass of 2012.4±0.7(stat)±0.6(syst) MeV/c^{2} width Γ=6.4_{-2.0}^{+2.5}(stat)±1.6(syst) MeV. The is seen primarily in ϒ(1S),ϒ(2S), ϒ(3S) decays.
We have carried out an experiment to search for a neutron-rich hypernucleus, $^6_{\Lambda}$H, by the $^6$Li($\pi^-,K^+$) reaction at $p_{\pi^-}$ =1.2 GeV/$c$. The obtained missing mass spectrum with estimated energy resolution of 3.2 MeV (FWHM) showed no peak structure corresponding $^6_{\Lambda}$H hypernucleus neither below nor above $^4_{\Lambda}$H$+2n$ particle decay threshold. An upper limit production cross section bound was be 1.2 nb/sr 90% confidence level.
We report the first observation of $$\Xi _{c}(2930)^0$$ charmed-strange baryon with a significance greater than 5 $$\sigma $$ . The is found in its decay to $$K^- \Lambda _{c}^+$$ $$B^{-} \rightarrow K^{-} _{c}^{+} \bar{\Lambda }_{c}^{-}$$ decays. measured mass and width are $$[2928.9 \pm 3.0(\mathrm stat.)^{+0.9}_{-12.0}(\mathrm syst.)]$$ MeV/ $$c^{2}$$ $$[19.5 8.4(\mathrm stat.) ^{+5.9}_{-7.9}(\mathrm MeV, respectively, product branching fraction $$\mathcal{B}(B^{-} \Xi _{c}(2930)^0...
Differential cross sections and photon-beam asymmetries have been measured for the gamma n --> K+ Sigma- p K+Sigma0 reactions separately using liquid deuterium hydrogen targets with incident linearly polarized photon beams of E = 1.5-2.4 GeV at 0.6 < cos ThetacmK< 1. The section ratio sigma Sigma-/sigma Sigma0, expected to be 2 on basis isospin 1/2 exchange, is found close For reaction, large positive are observed, indicating dominance K* exchange. difference between Sigma0 cannot explained...
In order to produce a neutron-rich Lambda hypernucleus for the first time, we carried out an experiment by utilizing (pi-,K+) double charge-exchange reaction on 10B target. We observed production of 10LambdaLi hypernucleus. The cross section bound region was found be 11.3+/-1.9 nb/sr with 1.2 GeV/c incident momentum, which is compared 10LambdaB section, 7.8+/-0.3 microb/sr, in (pi+,K+) 1.05 momentum beam.
Differential cross sections and photon-beam asymmetries for the gamma p -> K+ Lambda(1520) reaction have been measured with linearly polarized photon beams at energies from threshold to 2.4 GeV 0.6<cos(theta)<1. A new bump structure was found W=2.11 in sections. The is not well reproduced by theoretical calculations introducing a nucleon resonance J<=3/2. This result suggests that might be produced possibly J>=5/2 or process, example an interference effect phi photoproduction having similar
We report results from a study of the spin and parity ${\mathrm{\ensuremath{\Xi}}}_{c}(2970{)}^{+}$ using $980\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected by Belle detector at KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. The decay angle distributions in chain...