A5102870196- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Neutrino Physics Research
- Nuclear physics research studies
- Black Holes and Theoretical Physics
- Business Process Modeling and Analysis
- Advanced X-ray Imaging Techniques
- Nuclear Physics and Applications
- Particle Accelerators and Free-Electron Lasers
- Computational Physics and Python Applications
- Collaboration in agile enterprises
- Medical Imaging Techniques and Applications
- Cosmology and Gravitation Theories
- Advanced NMR Techniques and Applications
Central China Normal University
2002-2024
Institute of High Energy Physics
2006-2024
Guilin University of Electronic Technology
2023
Tsinghua University
2005-2007
University of Science and Technology of China
2004-2005
Carnegie Mellon University
2004
We observe a narrow enhancement near 2m(p) in the invariant mass spectrum of pp pairs from radiative J/psi-->gammapp decays. No similar structure is seen J/psi-->pi(0)pp The results are based on an analysis 58 x 10(6) event sample J/psi decays accumulated with BESII detector at Beijing electron-positron collider. can be fit either S- or P-wave Breit-Wigner resonance function. In case S-wave fit, peak below M=1859(+3)(-10) (stat)+5-25(syst) MeV/c(2) and total width Gamma<30 90% confidence...
We report values of R = sigma(e(+)e(-)-->hadrons)/sigma(e(+)e(-)-->mu(+)mu(-)) for 85 center-of-mass energies between 2 and 5 GeV measured with the upgraded Beijing Spectrometer at Electron-Positron Collider.
Based on 58 million BESII J/psi events, the bar{K}^*(892)^0K^+pi^- channel in K^+K^-pi^+pi^- is studied. A clear low mass enhancement invariant spectrum of K^+pi^- observed. The does not come from background other decay channels, nor phase space. Two independent partial wave analyses have been performed. Both favor that kappa, an isospinor scalar resonant state. average and width kappa two are 878 +- 23^{+64}_{-55} MeV/c^2 499 52^{+55}_{-87} MeV/c^2, respectively, corresponding to a pole at...
Using the BES-II detector at BEPC Collider, we measured lowest order cross sections and R values (R=σe+e−→hadrons0/σe+e−→μ+μ−0) for inclusive hadronic event production center-of-mass energies of 3.650, 3.6648 3.773 GeV. The results lead to R¯uds=2.218±0.019±0.089 which is average these 3.650 GeV GeV, R=3.746±0.037±0.187 s=3.773GeV. We determined section ψ(3770) be σψ(3770)B=(9.323±0.253±0.801)nb branching fractions decays BF(ψ(3770)→D0D¯0)=(49.5±1.3±3.8)%, BF(ψ(3770)→D+D−)=(35.7±1.1±3.4)%...
The decay ψ(2S)→KS0KL0 is observed using ψ(2S) data collected with the Beijing Spectrometer at Electron-Positron Collider; branching fraction determined to be B(ψ(2S)→KS0KL0)=(5.24±0.47±0.48)×10−5. Compared J/ψ→KS0KL0, enhanced relative prediction of perturbative QCD "12%" rule. result, together fractions decays other pseudoscalar meson pairs (π+π− and K+K−), used investigate phase between three-gluon one-photon annihilation amplitudes decays.Received 13 October...
The absolute branching fraction of $D^+ \to \mu^+ \nu$ has been directly measured by an analysis a data sample about 33 ${\rm pb^{-1}}$ collected around $\sqrt{s}=3.773$ GeV with the BES-II at BEPC. At these energies, $D^-$ meson is produced in pair as $e^+e^-\to D^{+} D^{-}$. A total $5321 \pm 149 160$ mesons are reconstructed from this set. In recoil side tagged mesons, $2.67\pm1.74$ purely leptonic decay events observed. This yields $BF(D^+ \nu_{\mu}) = (0.122^{+0.111}_{-0.053}\pm...
Using photon conversions to e+e− pairs, the energy spectrum of inclusive photons from ψ(2S) radiative decays is measured with resolution (σEγ) in range 2.3 3.8 MeV by BESII at Beijing Electron-Positron Collider. The χcJ(1P) states (J=0,1,2) are clearly observed, and their masses spin-averaged χcJ mass determined be Mχc0=3414.21±0.39±0.27, Mχc1=3510.30±0.14±0.16, Mχc2=3555.70±0.59±0.39, M(Pcog3)=3524.85±0.32±0.30 MeV/c2, respectively.Received 6 February...
Isomers, ubiquitous populations of relatively long-lived nuclear excited states, play a crucial role in physics. However, isomers with half-life times several seconds or less barely had experimental cross section data due to the lack suitable measuring method. We report method online {\gamma} spectroscopy for ultra-short-lived from photonuclear reactions using laser-driven ultra-intense {\gamma}-rays. The fastest time resolution can reach sub-ps level {\gamma}-ray intensities >10^{19}/s...
In recent years, with the continuous expansion of enrollment scale domestic colleges and universities, employment market is becoming increasingly severe, universities attach great importance to rate students. There are some difficulties in job such as pressure competition, limited way enterprise recruitment, untimely updating information isolated island information, etc. This App committed assist students employment, facilitate management universities.