- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Psychological and Educational Research Studies
Nanjing University
2023
Institute of High Energy Physics
2005-2009
Wuhan University
2005
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)%...
Using a data sample with total integrated luminosity of 10.0 pb$^{-1}$ collected at center-of-mass energies 2.6, 3.07 and 3.65 GeV BESII, cross sections for $e^+e^-$ annihilation into hadronic final states ($R$ values) are measured statistical errors that smaller than 1%, systematic about 3.5%. The running strong interaction coupling constants $α_s^{(3)}(s)$ $α_s^{(5)}(M_Z^2)$ determined from the $R$ values.