X. S. Jiang
A5103716213- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Black Holes and Theoretical Physics
- Computational Physics and Python Applications
- Dark Matter and Cosmic Phenomena
- Stochastic processes and statistical mechanics
- advanced mathematical theories
- Particle Detector Development and Performance
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Innovation Policy and R&D
- Markov Chains and Monte Carlo Methods
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Quantum chaos and dynamical systems
- Medical Imaging Techniques and Applications
- Advanced Algebra and Geometry
- Cold Atom Physics and Bose-Einstein Condensates
- Textile materials and evaluations
- Algorithms and Data Compression
- Quantum many-body systems
- Energy, Environment, Economic Growth
Institute of High Energy Physics
2009-2025
University of Chinese Academy of Sciences
2017-2025
Xi'an University of Finance and Economics
2024
The decays $\chi_{cJ}\to\gamma V$ ($V=\phi, \rho^0, \omega$) are studied with a sample of radiative $\psip\to\gamma\chi_{cJ}$ events in $(1.06\pm0.04)\times 10^{8} \psip$ collected the BESIII detector. branching fractions determined to be: ${\cal B}(\chi_{c1}\to \gamma\phi)=(25.8\pm 5.2\pm 2.3)\times 10^{-6}$, \gamma\rho^0)=(228\pm 13\pm 22)\times and \gamma\omega)=(69.7\pm 7.2\pm 6.6)\times 10^{-6}$. decay $\chi_{c1}\to \gamma\phi$ is observed for first time. Upper limits at 90% confidence...
A partial wave analysis of the $p\overline{p}$ mass-threshold enhancement in reaction $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}p\overline{p}$ is used to determine its ${J}^{\mathrm{PC}}$ quantum numbers be ${0}^{\ensuremath{-}+}$, peak mass below threshold at $M={1832}_{\ensuremath{-}5}^{+19}(\mathrm{stat}{)}_{\ensuremath{-}17}^{+18}(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}19(\mathrm{model})\text{ }\text{ }\mathrm{MeV}/{c}^{2}$, and total width...
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.
The $\pi N$ system in decays of $J/\psi\to\bar NN\pi$ is limited to be isospin 1/2 by conservation. This provides a big advantage studying $N^*\to \pi compared with and $\gamma experiments which mix 3/2 for the system. Using 58 million $J/\psi$ collected Beijing Electron Positron Collider, more than 100 thousand $J/\psi \to p \pi^- \bar n + c.c.$ events are obtained. Besides two well known $N^*$ peaks at 1500 MeV 1670 MeV, there new, clear $p\pi$ invariant mass spectrum around 1360 2030 MeV....