S.-H. Kyeong
A5105348567- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Functional Brain Connectivity Studies
- Neutrino Physics Research
- Advanced Neuroimaging Techniques and Applications
- Stroke Rehabilitation and Recovery
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Mental Health Research Topics
- Transcranial Magnetic Stimulation Studies
- Intensive Care Unit Cognitive Disorders
- Cerebral Palsy and Movement Disorders
- Digital Mental Health Interventions
- EEG and Brain-Computer Interfaces
- Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
- Impact of Technology on Adolescents
- Neural and Behavioral Psychology Studies
- Particle Detector Development and Performance
- Face Recognition and Perception
- Neurobiology of Language and Bilingualism
- Attention Deficit Hyperactivity Disorder
- Personality Disorders and Psychopathology
- Neurological disorders and treatments
- Stress Responses and Cortisol
Yonsei University
2015-2024
Institute of Behavioral Sciences
2019-2020
Seoul Veterans Hospital
2019
Pain and Rehabilitation Medicine
2019
Severance Hospital
2016-2017
Gangnam Severance Hospital
2016
National Institute for Mathematical Sciences
2012-2015
Korea Institute of Brain Science
2013
Cracow University of Technology
2009
Virginia Tech
2009
We study B→K(*)ℓ+ℓ− decays (ℓ=e, μ) based on a data sample of 657×106 BB¯ pairs collected with the Belle detector at KEKB e+e− collider. report differential branching fraction, isospin asymmetry, K* polarization, and forward-backward asymmetry (AFB) as functions q2=Mℓℓ2c2. The fitted AFB spectrum exceeds standard model expectation by 2.7 deviations. measured fractions are B(B→K*ℓ+ℓ−)=(10.7−1.0+1.1±0.9)×10−7 B(B→Kℓ+ℓ−)=(4.8−0.4+0.5±0.3)×10−7, where first errors statistical second systematic,...
We report a measurement of the exclusive e+ e- -->Lambda+_(c)Lambda-_(c) cross section as function center-of-mass energy near Lambda+_(c)Lambda-_(c) threshold. A clear peak with significance 8.2sigma is observed in invariant mass distribution just above With an assumption resonance origin for peak, and width M=[4634 (+8)_(-7)(stat)(+5)_(-8)(syst)] MeV/c(2) Gamma_(tot)=[92 (+40)_(-24)(stat)(+10)_(-21)(syst)] MeV are determined. The analysis based on study events initial-state-radiation...
We report the first observation of two resonance-like structures in pi+ chi_c1 invariant mass distribution near 4.1 GeV/c^2 exclusive B0-bar --> K- decays. From a Dalitz plot analysis which are represented by Breit-Wigner resonance amplitudes, we determine masses and widths of: M_1 = (4051 +-14 +20-41) MeV/c^2, Gamma_1 (82 +21-17 +47-22) MeV, M_2 (4248 +44-29 +180-35}) Gamma_2 =(177 +54-39 +316-61) MeV; product branching fractions BF(B0-bar Z+_1,2) x BF(Z+_1,2 chi_c1) (3.0 +1.5-0.8 +3.7-1.6)...
We report a high-statistics measurement of the branching fraction for tau^- --> pi^- pi^0 nu_tau and invariant mass spectrum produced system using 72.2 fb^-1 data recorded with Belle detector at KEKB asymmetric-energy e^+ e^- collider. The obtained is (25.24 +/- 0.01 0.39)%, where first error statistical second systematic. unfolded used to determine resonance parameters rho(770), rho'(1450), rho"(1700) mesons. also use this estimate hadronic (2pi) contribution anomalous magnetic moment muon...
The Collins effect connects transverse quark spin with a measurable azimuthal asymmetry in the yield of hadronic fragments around quark's momentum vector. Using two different reconstruction methods we measure statistically significant asymmetries for charged pion pairs ${e}^{+}{e}^{\ensuremath{-}}$ annihilation at center-of-mass energies 10.52 GeV and 10.58 GeV, which can be attributed to fragmentation primordial quarks components. measurement was performed using data set $547\text{ }\text{...
We report the results of a search for charmonium-like state produced in process gamma --> omega J/psi 3.9-4.2 GeV/c^2 mass region. observe significant enhancement, which is well-described by resonant shape with M = (3915 +/- 3 2) MeV/c^2 and total width Gamma (17 10 3) MeV. This enhancement may be related to one or more three states so far reported 3.90-3.95
The process $\gamma \gamma \to \phi \jpsi$ is measured for $\phi masses between threshold and 5 GeV/${\it c}^2$, using a data sample of 825 fb$^{-1}$ collected with the Belle detector. A narrow peak $8.8^{+4.2}_{-3.2}$ events, significance 3.2 standard deviations including systematic uncertainty, observed. mass natural width structure (named X(4350)) are to be $(4350.6^{+4.6}_{-5.1}(\rm{stat})\pm 0.7(\rm{syst})) \hbox{MeV}/{\it c}^2$ $(13^{+18}_{-9}(\rm{stat})\pm 4(\rm{syst})) \hbox{MeV}$,...
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...
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...
We present a new measurement of the unitarity triangle angle phi3 using Dalitz plot analysis KsPi+Pi- decay neutral D meson produced in B->D(*)K decays. The method exploits interference between D0 and D0bar to extract phi3, strong phase delta ratio r suppressed allowed amplitudes. apply this 605 fb-1 data sample collected by Belle experiment. uses three decays: B->DK, B->D*K with D*->DPi0 D*->Dgamma, as well corresponding charge-conjugate modes. From combined maximum likelihood fit modes, we...
The cross sections for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\phi}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\phi}{f}_{0}(980)$ are measured from threshold to $\sqrt{s}=3.0\text{ }\text{ }\mathrm{GeV}$ using initial-state radiation. analysis is based on a data sample of $673\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected below the $\ensuremath{\Upsilon}(4S)$ resonance with Belle...
From a Dalitz plot analysis of $B\ensuremath{\rightarrow}K{\ensuremath{\pi}}^{+}{\ensuremath{\psi}}^{\ensuremath{'}}$ decays, we find signal for $Z(4430{)}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\psi}}^{\ensuremath{'}}$ with mass $M=({4443}_{\ensuremath{-}12\ensuremath{-}13}^{+15+19})\text{ }\text{ }\mathrm{MeV}/{c}^{2}$, width $\ensuremath{\Gamma}=({107}_{\ensuremath{-}43\ensuremath{-}56}^{+86+74})\text{ }\mathrm{MeV}$, product branching fraction...
Using 605 fb−1 of data collected at the Υ(4S) resonance we present a measurement inclusive radiative B-meson decay channel, B→Xsγ. For lower photon energy thresholds 1.7, 1.8, 1.9, and 2.0 GeV, as defined in rest frame B meson, measure partial branching fraction mean variance spectrum. At 1.7 GeV threshold obtain BF(B→Xsγ)=(3.45±0.15±0.40)×10−4, where errors are statistical systematic.Received 8 July 2009DOI:https://doi.org/10.1103/PhysRevLett.103.241801©2009 American Physical Society
Recently, the Autism Brain Imaging Data Exchange (ABIDE) project revealed decreased functional connectivity in individuals with Spectrum Disorders (ASD) relative to typically developing controls (TDCs). However, it is still questionable whether source of under-connectivity subjects ASD equally contributed by ipsilateral and contralateral parts brain. In this study, we decomposed inter- intra-hemispheric regions compared density (FCD) between 458 517 TDCs from ABIDE database. We quantified...
Insurance companies have focused on medicare fraud detection to reduce financial losses and reputational harm because causes tens of billions dollars in damage annually. This study demonstrates that can be significantly enhanced by introducing graph analysis with considering the relationships among medical providers, beneficiaries, physicians. We use open-source tabular datasets containing beneficiary information, inpatient claims, outpatient indications about potential fraudulent providers....
We present a high-statistics measurement of differential cross sections and the total section for process $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$ in kinematic range $0.6\text{ }\text{ }\mathrm{GeV}\ensuremath{\le}W\ensuremath{\le}4.0\text{ }\mathrm{GeV}$ $|\mathrm{cos}{\ensuremath{\theta}}^{*}|\ensuremath{\le}0.8$, where $W$ ${\ensuremath{\theta}}^{*}$ are energy pion scattering angle, respectively,...
We present a measurement of the decay B−→τ−ν¯τ using data sample containing 657×106 BB¯ pairs collected at Υ(4S) resonance with Belle detector KEKB asymmetric-energy e+e− collider. A B+B− are tagged by reconstructing one B+ meson decaying semileptonically. detect candidate in recoil. obtain signal significance 3.6 standard deviations including systematic uncertainties, and measure branching fraction to be B(B−→τ−ν¯τ)=[1.54−0.37+0.38(stat)−0.31+0.29(syst)]×10−4. This result confirms evidence...
We report measurements of the exclusive cross section for e+e−→D0D*−π+ as a function center-of-mass energy from D0D*−π+ threshold to 5.2 GeV with initial-state radiation. No evidence is found Y(4260)→D0D*−π+ decays. The analysis based on data sample collected Belle detector at or near 10.58 an integrated luminosity 695 fb−1 KEKB asymmetric-energy e+e− collider.Received 4 August 2009DOI:https://doi.org/10.1103/PhysRevD.80.091101©2009 American Physical Society
We measure the production cross sections for e+e- -> Upsilon(1S)pi+pi-, Upsilon(2S)pi+pi-, and Upsilon(3S)pi+pi- as a function of sqrt{s} between 10.83 GeV 11.02 GeV. The data consists 8.1 fb^-1 collected with Belle detector at KEKB collider. observe enhanced in all three final states that does not agree well conventional Upsilon(10860) lineshape. A fit using Breit-Wigner resonance shape yields peak mass [10888.4 +2.7/-2.6 (stat) +- 1.2 (syst)] MeV/c^2 width [30.7 +8.3/-7.0 3.1 MeV/c^2.
The differential cross section for the process $\ensuremath{\gamma}\ensuremath{\gamma}\ensuremath{\rightarrow}\ensuremath{\eta}{\ensuremath{\pi}}^{0}$ has been measured in kinematic range $0.84\text{ }\text{ }\mathrm{GeV}<W<4.0\text{ }\mathrm{GeV}$, $|\mathrm{cos}{\ensuremath{\theta}}^{*}|<0.8$, where $W$ and ${\ensuremath{\theta}}^{*}$ are energy ${\ensuremath{\pi}}^{0}$ (or $\ensuremath{\eta}$) scattering angle, respectively, $\ensuremath{\gamma}\ensuremath{\gamma}$ center-of-mass system....
We present a new measurement of the ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}J/\ensuremath{\psi}c\overline{c}$ cross section where $c\overline{c}$ pair can fragment either into charmed hadrons or charmonium state. In former case $J/\ensuremath{\psi}$ and hadron are reconstructed, while latter process is measured using recoil mass technique, which allows identification two-body final states without reconstruction one charmonia. The...
This article describes a determination of the Cabibbo-Kobayashi-Maskawa matrix element $|{V}_{cb}|$ from decay ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\ell}}^{+}{\ensuremath{\nu}}_{\ensuremath{\ell}}$ using $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ Belle data collected near $\ensuremath{\Upsilon}(4S)$ resonance. We simultaneously measure product form factor normalization $\mathcal{F}(1)$ and as well three parameters ${\ensuremath{\rho}}^{2}$, ${R}_{1}(1)$...