A5107866161- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Superconducting Materials and Applications
- Medical Imaging Techniques and Applications
- Black Holes and Theoretical Physics
- Radiation Detection and Scintillator Technologies
- Atomic and Subatomic Physics Research
- Network Security and Intrusion Detection
- Astrophysics and Cosmic Phenomena
- Algebraic Geometry and Number Theory
- Muon and positron interactions and applications
- Advanced Algebra and Geometry
- Distributed and Parallel Computing Systems
- Anomaly Detection Techniques and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Coding theory and cryptography
- Atomic and Molecular Physics
- Scientific Computing and Data Management
National Taiwan University
2015-2024
University of the Basque Country
2022
Chonnam National University
2022
University of Bonn
2022
Niigata University
2015
University of Nova Gorica
2015
Novosibirsk State University
2015
Osaka City University
2015
Institute of Nuclear Physics, Polish Academy of Sciences
2015
European Organization for Nuclear Research
2012
The cross section for ee+ e- → π+ π- J/ψ between 3.8 and 5.5 GeV is measured with a 967 fb(-1) data sample collected by the Belle detector at or near Υ(nS) (n = 1,2,…,5) resonances. Y(4260) state observed, its resonance parameters are determined. In addition, an excess of production around 4 observed. This feature can be described Breit-Wigner parametrization properties that consistent Y(4008) was previously reported Belle. study decays, structure observed in M(π(±)J/ψ) mass spectrum 5.2σ...
The cross section for ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\psi}(2S)$ between threshold and $\sqrt{s}=5.5\text{ }\text{ }\mathrm{GeV}$ is measured using $673\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of data on off the $\ensuremath{\Upsilon}(4S)$ resonance collected with Belle detector at KEKB. Two resonant structures are observed in...
We present a measurement of angular observables and test lepton flavor universality in the $B\ensuremath{\rightarrow}{K}^{*}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$ decay, where $\ensuremath{\ell}$ is either $e$ or $\ensuremath{\mu}$. The analysis performed on data sample corresponding to an integrated luminosity $711\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ containing $772\ifmmode\times\else\texttimes\fi{}1{0}^{6}$ $B\overline{B}$ pairs, collected at...
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 present an improved measurement of the branching fraction for electroweak penguin process $B\ensuremath{\rightarrow}{X}_{s}{\ensuremath{\ell}}^{+}{\ensuremath{\ell}}^{\ensuremath{-}}$, where $\ensuremath{\ell}$ is electron or a muon and ${X}_{s}$ hadronic system containing $s$-quark. The based on sample $152\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $\ensuremath{\Upsilon}(4S)\ensuremath{\rightarrow}B\overline{B}$ events collected with Belle detector at KEKB energy asymmetric...
We present the results of an amplitude analysis anti-B0 -> J/psi K- pi+ decays. A new charged charmoniumlike state Zc(4200)+ decaying to is observed with a significance 6.2 sigma. The mass and width are 4196 +31-29 +17-13 MeV/c^2 370 +70-70 +70-132 MeV, respectively; preferred assignment quantum numbers J^P = 1^+. In addition, we find evidence for Zc(4430)+ pi+. based on 711 fb^-1 data sample collected by Belle detector at asymmetric-energy e+ e- collider KEKB.
We report measurement of the cross section $e^+e^-\to \pi^+\pi^-\psi(2S)$ between 4.0 and $5.5 {\rm GeV}$, based on an analysis initial state radiation events in a $980 \rm fb^{-1}$ data sample recorded with Belle detector. The properties $Y(4360)$ $Y(4660)$ states are determined. Fitting mass spectrum $\pi^+\pi^-\psi(2S)$ two coherent Breit-Wigner functions, we find solutions identical width but different couplings to electron-positron pairs: $M_{Y(4360)} = (4347\pm 6\pm 3) MeV}/c^2$,...
We present a measurement of angular observables and test lepton flavor universality in the $B\to K^\ast \ell^+\ell^-$ decay, where $\ell$ is either $e$ or $μ$. The analysis performed on data sample corresponding to an integrated luminosity $711~\mathrm{fb}^{-1}$ containing $772\times 10^{6}$ $B\bar B$ pairs, collected at $Υ(4S)$ resonance with Belle detector asymmetric-energy $e^+e^-$ collider KEKB. result consistent Standard Model (SM) expectations, largest discrepancy from SM prediction...
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...
Using the entire Belle data sample of 980 ${\rm fb}^{-1}$ $e^+e^-$ collisions, we present results a study excited $\Omega_c$ charmed baryons in decay mode $\Xi_c^+K^-$. We show confirmation four five narrow states reported by LHCb Collaboration: $\Omega_c(3000)$ , $\Omega_c(3050)$, $\Omega_c(3066)$, and $\Omega_c(3090)$.
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...
We report the first evidence for ${\ensuremath{\eta}}_{b}(2S)$ using ${h}_{b}(2P)\ensuremath{\rightarrow}{\ensuremath{\eta}}_{b}(2S)\ensuremath{\gamma}$ transition and observation of ${h}_{b}(1P)\ensuremath{\rightarrow}{\ensuremath{\eta}}_{b}(1S)\ensuremath{\gamma}$ ${h}_{b}(2P)\ensuremath{\rightarrow}{\ensuremath{\eta}}_{b}(1S)\ensuremath{\gamma}$ transitions. The mass width ${\ensuremath{\eta}}_{b}(1S)$ are measured to be...
We report results on studies of the e+e- annihilation into three-body Y(nS)pi+pi- (n=1,2,3) final states including measurements cross sections and full amplitude analysis. The measured at sqrt(s)=10.865 GeV corrected for initial state radiation are sigma(e+e-=>Y(1S)pi+pi-)=(2.27+-0.12+-0.14) pb, sigma(e+e-=>Y(2S)pi+pi-)=(4.07+-0.16+-0.45) sigma(e+e-=>Y(3S)pi+pi-)=(1.46+-0.09+-0.16) pb. Amplitude analysis strongly favors I^G(J^P)=1^+(1^+) quantum-number assignments two bottomonium-like Zb+-...
We present an analysis of charm quark fragmentation at 10.6 GeV, based on a data sample $103\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the Belle detector KEKB accelerator. consider into main charmed hadron ground states, namely ${D}^{0},{D}^{+},{D}_{s}^{+}$ and ${\ensuremath{\Lambda}}_{c}^{+}$, as well excited states ${D}^{*0}$ ${D}^{*+}$. The functions are important to measure they describe processes low energy scale, where calculations in perturbation theory lead large...
We report measurements of branching fractions $\tau$ lepton decays to final states with a $K^{0}_{S}$ meson using 669 fb$^{-1}$ data sample accumulated the Belle detector at KEKB asymmetric-energy $e^{+}e^{-}$ collider. The inclusive fraction is measured be $\mathcal{B}(\tau^{-} \to K^{0}_{S}\ X^{-} \nu_{\tau})=(9.15 \pm 0.01 0.15) \times 10^{-3}$, where $X^{-}$ can anything; exclusive are \pi^{-} K^{0}_{S} \nu_{\tau}) = (4.16 0.08) K^{-} (7.40 0.07 0.27) 10^{-4}$, \pi^{0} (1.93 0.02 0.07)...
Using a data sample of $980\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ ${e}^{+}{e}^{\ensuremath{-}}$ annihilation taken with the Belle detector operating at KEKB asymmetric-energy collider, we report results study excited ${\mathrm{\ensuremath{\Xi}}}_{c}$ states that decay, via emission photons and/or charged pions, into ${\mathrm{\ensuremath{\Xi}}}_{c}^{0}$ or ${\mathrm{\ensuremath{\Xi}}}_{c}^{+}$ ground state charmed-strange baryons. We present new measurements masses all members...
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 report a determination of the B(0)(d)-&B_(0)(d) mixing parameter Deltam(d) based on time evolution dilepton yields in Upsilon(4S) decays. The measurement is 5.9 fb(-1) data sample collected by Belle detector at KEKB. proper-time difference distributions for same-sign and opposite-sign events are simultaneously fitted to an expression containing as free parameter. Using both muons electrons, we obtain = 0.463+/-0.008 (stat)+/-0.016 (syst) ps(-1). This first from measurements Upsilon(4S)....
The suppressed decay chain B(-)→DK(-), D→K(+)π(-), where D indicates a D(¯)(0) or D(0) state, provides important information on the CP-violating angle ϕ(3). We measure ratio R(DK) of rates to favored mode D→K(-)π(+) be R(DK)=[1.63(-0.41)(+0.44)(stat)(-0.13)(+0.07)(syst)]×10(-2), which first evidence signal with significance 4.1σ. also asymmetry A(DK) between charge-conjugate decays A(DK)=-0.39(-0.28)(+0.26)(stat)(-0.03)(+0.04)(syst). results are based full 772×10(6) BB(¯) pair data sample...
We report the discovery of ${\mathrm{\ensuremath{\Xi}}}_{c}(3055{)}^{0}$, observed by its decay into final-state $\mathrm{\ensuremath{\Lambda}}{D}^{0}$, and present first observation evidence decays ${\mathrm{\ensuremath{\Xi}}}_{c}(3055{)}^{+}$ ${\mathrm{\ensuremath{\Xi}}}_{c}(3080{)}^{+}$ $\mathrm{\ensuremath{\Lambda}}{D}^{+}$. also perform a combined analysis $\mathrm{\ensuremath{\Lambda}}{D}^{+}$ with ${\mathrm{\ensuremath{\Sigma}}}_{c}^{++}{K}^{\ensuremath{-}}$...
A bstract We report a new measurement of the e + − → ϒ( nS ) π ( n = 1 , 2 3) cross sections at energies from 10 . 52 to 11 02 GeV using data collected with Belle detector KEKB asymmetric-energy collider. observe structure in energy dependence sections; if described by Breit-Wigner function its mass and width are found be $$ M=\left(10752.7\pm {5.9}_{-1.1}^{+0.7}\right)\mathrm{MeV}/{c}^2 <mml:math...
We report measurements of the branching fractions for B0→π+π−, K+π−, K+K−, and K0π0 B+→π+π0, K+π0, K0π+, K+¯K0, based on 10.4fb−1 data collected Υ(4S) resonance with Belle detector. find B(B0→π+π−)=(0.56+0.23+0.04−0.20−0.05)×10−5, B(B0→K+π−)=(1.93+0.34+0.15−0.32−0.06)×10−5, B(B+→K+π0)=(1.63+0.35+0.16−0.33−0.18)×10−5, B(B+→K0π+)=(1.37+0.57+0.19−0.48−0.18)×10−5, B(B0→K0π0)=(1.60+0.72+0.25−0.59−0.27)×10−5. also set upper limits B0→K+K−, B+→K+¯K0.Received 17 April...