A5072570367- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- High-Velocity Impact and Material Behavior
- Energetic Materials and Combustion
- Structural Response to Dynamic Loads
- Dark Matter and Cosmic Phenomena
- Cellular and Composite Structures
- Mechanical Behavior of Composites
- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- Atomic and Subatomic Physics Research
- Transport Systems and Technology
- International Science and Diplomacy
- Markov Chains and Monte Carlo Methods
- Nuclear physics research studies
- Rocket and propulsion systems research
- Enzyme Structure and Function
- Stochastic processes and statistical mechanics
- Polymer Foaming and Composites
- Medical Imaging Techniques and Applications
- HVDC Systems and Fault Protection
- High-Voltage Power Transmission Systems
- Computational Physics and Python Applications
- Geotechnical Engineering and Soil Mechanics
North University of China
2017-2024
Institute of High Energy Physics
2004-2024
Shanghai Jiao Tong University
2021
Harbin Institute of Technology
2014-2015
Central China Normal University
2014
Petersburg Nuclear Physics Institute
2011
University of Washington
2011
Shanghai Institute of Applied Physics
2004
The decays J/ψ → γ π+ π- π0 and are analyzed using a sample of 225×10(6) events collected with the BESIII detector. decay η(1405) f(0)(980)π0 large isospin violation is observed for first time. width f(0)(980) in dipion mass spectra anomalously narrower than world average. Decay rates three-pion η' also measured precisely.
We present data on ${e}^{+}{e}^{\ensuremath{-}}$ pair production accompanied by nuclear breakup in ultraperipheral gold-gold collisions at a center of mass energy $200\phantom{\rule{0.3em}{0ex}}\mathrm{GeV}$ per nucleon pair. The requirement selects events small impact parameters, where higher-order diagrams for should be enhanced. compare the with two calculations: one based equivalent photon approximation, and other using lowest-order quantum electrodynamics (QED). distributions agree both...
An enhancement near threshold is observed in the omega(phi) invariant mass spectrum from doubly Okubo-Zweig-Iizuka-suppressed decays of J/psi-->gamma(omega)phi, based on a sample 5.8 x 10(7) J/psi events collected with BESII detector. A partial wave analysis shows that this favors JP=0+, and its width are M=1812(+19)(-26)(stat)+/-18(syst) MeV/c2 Gamma=105+/-20(stat)+/-28(syst) MeV/c2. The product branching fraction determined to be...
A bstract Using (10087 ± 44) × 10 6 J / ψ events collected with the BESIII detector at BEPCII e + − storage ring center-of-mass energy of $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> </mml:math> = 3.097 GeV, we present a search for rare semi-muonic charmonium decay → D μ ν c.c.. Since no significant signal is observed, set an upper limit branching fraction to be \mathcal{B} <mml:mi>B</mml:mi> ( c.c.) < 5.6 7 90%...
Using samples of 2.25*10^8 J/psi events and 1.06*10^8 psi' collected with the BES III detector, we study f0(980) to a0(980) transitions in processes --> phi chi_c1 pi^0 f0(980), respectively. Evidence for is found a significance 3.4 sigma, while case transition, 1.9 sigma. Measurements upper limits both branching ratios mixing intensities are determined.
Using 4.7 fb^{-1} of e^{+}e^{-} collision data at center-of-mass energies from 4.661 to 4.951 GeV collected by the BESIII detector BEPCII collider, we observe X(3872) production process e^{+}e^{-}→ωX(3872) for first time. The significance is 7.8σ, including both statistical and systematic uncertainties. Born cross section corresponding upper limit 90% confidence level each energy point are reported. line shape indicates that ωX(3872) signals may be decays some nontrivial structures.
An enhancement near the mp+MΛ mass threshold is observed in combined pΛ¯ and p¯Λ invariant-mass spectrum from J/ψ→pK−Λ¯+c.c. decays. It can be fit with an S-wave Breit-Wigner resonance a m=2075±12(stat)±5(syst) MeV width of Γ=90±35(stat)±9(syst) MeV; it also P-wave resonance. Evidence for similar ψ′→pK−Λ¯+c.c. The analysis based on samples 5.8×107J/ψ 1.4×107ψ′ decays accumulated BES II detector at Beijing Electron-Positron Collider.Received 19 May...
Abstract In this work, mechanical behavior and damage kinetics of a unidirectional carbon/epoxy laminated composite (CFRP) under dynamic compressive loading were investigated. An Instron testing machine pulse‐shaped split Hopkinson pressure bar (SHPB) apparatus employed to test the quasi‐static properties material, respectively. Digital image correlation (DIC) combined with ultra high‐speed photography was used study deformation failure process specimen loading. The results show that modes...
The decay channel $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\omega}\ensuremath{\omega}$, $\ensuremath{\omega}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{0}$ is analyzed using a sample of $5.8\ifmmode\times\else\texttimes\fi{}{10}^{7}$ $J/\ensuremath{\psi}$ events collected with the BESII detector. $\ensuremath{\omega}\ensuremath{\omega}$ invariant mass distribution peaks at $1.76\text{ }\text{...
Results are presented on $J/\ensuremath{\psi}$ radiative decays to ${K}^{+}{K}^{\ensuremath{-}}$ and ${K}_{S}^{0}{K}_{S}^{0}$ based a sample of 58M events taken with the BES II detector. A partial wave analysis is carried out using relativistic covariant tensor amplitude method in 1--2 GeV mass range. There conspicuous production due ${f}_{2}^{\ensuremath{'}}(1525)$ ${f}_{0}(1710).$ The latter peaks at $1740\ifmmode\pm\else\textpm\fi{}{4}_{\ensuremath{-}25}^{+10}\mathrm{MeV}$ width...
New data are presented on $J/ψ\to ωK^+K^-$ from a sample of 58M $J/ψ$ events in the upgraded BES II detector at BEPC. There is conspicuous signal for $f_0(1710) \to K^+K^-$ and peak higher mass which may be fitted with $f_2(2150) K\bar K$. From combined analysis $ωπ^+ π^-$ data, branching ratio $BR(f_0(1710)\toππ)/BR(f_0(1710) K)$ $< 0.11$ 95% confidence level.
Using a sample of 14×106 ψ(2S) events accumulated with the BES II detector, evidence for f0(980)f0(980) production in χc0 decays is obtained first time; branching ratio determined to be B[χc0→f0(980)f0(980)→π+π−π+π−]=[7.6±1.9 (stat)±1.6 (syst)]×10−4. The significance f0(980) signal about 4.6σ.Received 28 June 2004DOI:https://doi.org/10.1103/PhysRevD.70.092002©2004 American Physical Society
We report the first observation of semi-muonic decay $D^+\to \omega \mu^+\nu_\mu$ using an $e^+e^-$ collision data sample corresponding to integrated luminosity $2.93~\mathrm{fb}^{-1}$ collected with BESIII detector at a center-of-mass energy 3.773 GeV. The absolute branching fraction is measured be ${\mathcal B}_{D^+\to \omega\mu^+\nu_\mu}=(17.7\pm1.8_{\rm stat}\pm1.1_{\rm syst})\times 10^{-4}$. Its ratio world average value e^+\nu_e$ probes lepton flavor universality and it determined...
The branching ratio of $J/\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\psi}}{K}_{S}^{0}{K}_{L}^{0}$ is measured with improved precision to be $\mathcal{B}(J/\stackrel{\ensuremath{\rightarrow}}{\ensuremath{\psi}}{K}_{S}^{0}{K}_{L}^{0})=(1.82\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.13)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ using $J/\ensuremath{\psi}$ data collected the Beijing Spectrometer (BESII) at Electron-Positron Collider. This result used test...
Using 14 x 10(6) psi(2S) events accumulated at the BESII detector, we report first measurements of branching fractions or upper limits for decays into gammapp, gamma2(pi+pi-), gammaKS0K+pi-+c.c., gammaK+K-pi+pi-, gammaK*0K-pi++c.c., gammaK*0K*0, gammapi+pi-pp, gamma2(K+K-), gamma3(pi+pi-), and gamma2(pi+pi-)K+K- with invariant mass hadrons below 2.9 GeV/c2. We also 2(pi+pi-)pi0, omegapi+pi-, omegaf2(1270), b1+/-pi-/+, pi02(pi+pi-)K+K-.
A bstract We measured the Born cross sections for process e + − → ωη ′ at 22 center-of-mass energies from 2.000 to 3.080 GeV with BESIII detector BEPCII collider. observed a resonant structure statistical significance of 9.6 σ . Breit-Wigner fit determines its mass be M R = (2153 ± 30 31) MeV /c 2 and width Γ (167 77 7) MeV, where first uncertainties are second systematic.