Z. H. Duan
A5083335179- 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
- advanced mathematical theories
- Stochastic processes and statistical mechanics
- Medical Imaging Techniques and Applications
- Industrial Vision Systems and Defect Detection
- Atomic and Subatomic Physics Research
- Soil Mechanics and Vehicle Dynamics
- Power Line Inspection Robots
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Nuclear physics research studies
- Neutrino Physics Research
- Gas Sensing Nanomaterials and Sensors
- International Science and Diplomacy
- Irrigation Practices and Water Management
- Quantum chaos and dynamical systems
- Ginger and Zingiberaceae research
- Robotics and Automated Systems
- Nonlinear Optical Materials Research
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum many-body systems
Nanjing University
2024-2025
Sichuan Agricultural University
2025
Zhejiang University of Water Resource and Electric Power
2024-2025
Zhejiang Water Conservancy and Hydropower Survey and Design Institute
2024-2025
Zhejiang University of Technology
2025
The beta decay of the lightest charmed baryon $${\Lambda }_{c}^{+}$$ provides unique insights into fundamental mechanism strong and electro-weak interactions, serving as a testbed for investigating non-perturbative quantum chromodynamics constraining Cabibbo-Kobayashi-Maskawa (CKM) matrix parameters. This article presents first observation Cabibbo-suppressed }_{c}^{+}\to n{e}^{+}{\nu }_{e}$$ , utilizing 4.5 fb−1 electron-positron annihilation data collected with BESIII detector. A novel...
Based on 6.1 fb^{-1} of e^{+}e^{-} annihilation data collected at center-of-mass energies from 4.600 to 4.843 GeV with the BESIII detector BEPCII collider, a partial wave analysis Λ_{c}^{+}→Λπ^{+}η is performed, and branching fractions decay asymmetry parameters intermediate processes are determined. The process Λ_{c}^{+}→Λa_{0}(980)^{+} observed for first time, evidence pentaquark candidate Σ(1380)^{+} decaying into Λπ^{+} found statistical significance larger than 3σ mass width fixed...
To investigate the variations in flow field of centrifugal pumps with different cavitation numbers, this study utilized shear stress transport k–ω turbulence model and Zwart–Gerber–Belamri to examine correlation between stall vortices flow. The findings indicate that consistently coincides formation vortices, distribution mirrors pattern vortex structure. Cavitation tends develop aggregate around obstructing a significant portion inlet areas within channel. As number decreases, both area...
A search for $\eta_c(2S)\to p\bar{p}K^+K^-$, together with measurement of branching fractions $\chi_{cJ(J=0,1,2)}\to p\bar{p}K^+K^-$ in the $\psi(3686) \to \gamma \eta_c(2S)$ and \chi_{cJ}$ radiative decays, is performed $(2712.4\pm14.3)\times 10^6$ $\psi(3686)$ events collected BESIII detector at BEPCII collider. An evidence found, a significance $3.3\sigma$. The product fraction $\mathcal{B}[\psi(3686)\to\gamma\eta_c(2S)]\cdot\mathcal{B}[\eta_c(2S)\to p\bar{p}K^+K^-]$ determined to be...
Ginger leaf polyphenols (GLP) alleviated β-amyloid toxicity by activating the JNK/FOXO signaling pathway in Caenorhabditis elegans .
We study the electromagnetic Dalitz decay $J/\psi \to e^+e^- \pi^0$ using $(10087 \pm 44) \times 10^6$ $J/\psi$ events collected by \bes detector. The di-electron-invariant-mass dependent transition form factor of this is explored for first time. A significant resonant structure corresponding to $\rho/\omega$ resonance observed, which cannot be described existing theoretical models, due contributions from isospin-conserving \rho and isospin-volating \omega decays. observed $\rho$--$\omega$...
We present the first amplitude analysis and branching fraction measurement of decay $D^+_s\to \pi^+\pi^+\pi^-\pi^0\pi^0$, using $e^+e^-$ collision data collected with BESIII detector at center-of-mass energies between 4.128 4.226 GeV corresponding to an integrated luminosity 7.33 fb$^{-1}$, report observation pure $W$-annihilation $D_s^+ \to \omega\rho^+$ a $(0.99\pm0.08_{\rm stat}\pm0.07_{\rm syst})\%$. In comparison low significance $\mathcal{D}$ wave in \phi\rho^+$, dominance over...
We search for the leptonic decay $D^+\to e^+\nu_{e}$ using an $e^+e^-$ collision data sample with integrated luminosity of 20.3~fb$^{-1}$ collected BESIII detector at center-of-mass energy 3.773~GeV. No significant signal is observed and upper limit on branching fraction set as $9.7 \times 10^{-7}$, 90\% confidence level. Our order magnitude smaller than previous this mode.
Using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mo stretchy="false">(</a:mo><a:mn>2.712</a:mn><a:mo>±</a:mo><a:mn>0.014</a:mn><a:mo stretchy="false">)</a:mo><a:mo>×</a:mo><a:msup><a:mrow><a:mn>10</a:mn></a:mrow><a:mrow><a:mn>9</a:mn></a:mrow></a:msup><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>ψ</a:mi><a:mo stretchy="false">(</a:mo><a:mn>2</a:mn><a:mi>S</a:mi><a:mo stretchy="false">)</a:mo></a:mrow></a:math> events collected with the BESIII detector...
Using data samples collected by the \mbox{BESIII} detector located at Beijing Electron Positron Collider, cross sections of process $e^+e^-\to f_{1}(1285)\pi^+\pi^-$ are measured forty-five center-of-mass energies from $3.808$ to $4.951 {\rm GeV}$. An investigation on section line shape is performed, and no significant structure observed.
Using $\psi(3686)\rightarrow \pi^{0} h_{c}$ decays from a data sample of $(27.12\pm0.14)\times10^{8}$ $\psi(3686)$ events collected by the BESIII detector at BEPCII collider, $h_c$ radiative to $\gamma\pi^{+}\pi^{-},~\gamma\pi^{+}\pi^{-}\eta,~\gamma2(\pi^{+}\pi^{-})$, and $\gamma p\bar{p}$ are observed for first time, each with significance greater than $5\sigma$. The corresponding branching fractions measured. Furthermore, intermediate states below 2.8 GeV/$c^{2}$ investigated, leading...
By analyzing a $\psi(3686)$ data sample containing $(107.7\pm0.6)\times10^{6}$ events taken with the BESIII detector at BEPCII storage ring in 2009, $\chi_{c0}$ resonance parameters are precisely measured using $\chi_{c0,c2} \to \pi^+\pi^-/K^+K^-$ events. The mass of is determined to be $M(\chi_{c0})=(3415.67\pm0.07\pm0.06\pm0.07$)~MeV/$c^2$, and its full width $\Gamma(\chi_{c0})=(12.44\pm0.12\pm0.12)~{\rm MeV}$, where first uncertainty statistical, second systematic, third for comes from...
Utilizing <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>4.5</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:msup><a:mrow><a:mi>fb</a:mi></a:mrow><a:mrow><a:mo>−</a:mo><a:mn>1</a:mn></a:mrow></a:msup></a:mrow></a:math> of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>e</c:mi><c:mo>+</c:mo></c:msup><c:msup><c:mi>e</c:mi><c:mo>−</c:mo></c:msup></c:math> annihilation data collected with the BESIII detector at BEPCII...
ABSTRACT A small‐scale coating thickness detection robot with remote wireless control was developed to solve the problems of high labor intensity, safety hazards, and lack special automated equipment for plane steel gate panel detection. The adopted a chain mechanism permanent magnet realize adsorption crawling on vertical panels, 180° reversible bench designed conversion between operation cleaning operation. flexibility improved by x ‐axis z movement mechanism; it made capable adjusting...
A bstract Using e + − collision data collected with the BESIII detector at BEPCII collider center-of-mass energies between 3.510 and 4.914 GeV, corresponding to an integrated luminosity of 25 fb 1 , we measure Born cross sections for process $$ {e}^{+}{e}^{-}\to {K}^{-}{\overline{\Xi}}^{+}\Lambda /{\Sigma}^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>e</mml:mi> <mml:mo>+</mml:mo> </mml:msup> <mml:mo>−</mml:mo> <mml:mo>→</mml:mo> <mml:mi>K</mml:mi>...
Using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>7.33</a:mn><a:mtext> </a:mtext><a:mtext> </a:mtext><a:msup><a:mi>fb</a:mi><a:mrow><a:mo>−</a:mo><a:mn>1</a:mn></a:mrow></a:msup></a:math> of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>e</c:mi><c:mo>+</c:mo></c:msup><c:msup><c:mi>e</c:mi><c:mo>−</c:mo></c:msup></c:math> collision data collected by the BESIII detector at center-of-mass energies in range <e:math...
The process <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>e</a:mi><a:mo>+</a:mo></a:msup><a:msup><a:mi>e</a:mi><a:mo>−</a:mo></a:msup><a:mo stretchy="false">→</a:mo><a:mi>p</a:mi><a:mover accent="true"><a:mi>p</a:mi><a:mo accent="true" stretchy="false">¯</a:mo></a:mover><a:msup><a:mi>π</a:mi><a:mn>0</a:mn></a:msup></a:math> is studied at 20 center-of-mass energies ranging from 2.1000 to 3.0800 GeV using <g:math...
Abstract One of the fundamental goals particle physics is to gain a microscopic understanding strong interaction. Electromagnetic form factors quantify structure hadrons in terms charge and magnetization distributions. While nucleon has been investigated extensively, data on hyperons are still scarce. It recently demonstrated that electron-positron annihilations into hyperon-antihyperon pairs provide powerful tool investigate their inner structure. We present method useful for different...
With data samples collected with the BESIII detector at seven energy points $\sqrt{s}= 3.68 - 3.71$ GeV, corresponding to an integrated luminosity of 333 pb$^{-1}$, we present a study $\Lambda$ transverse polarization in $e^+e^-\to\Lambda\bar\Lambda$ reaction. The significance by combining is found be 2.6$\sigma$ including systematic uncertainty, which implies non-zero phase between transition amplitudes $\Lambda\bar\Lambda$ helicity states. modulus ratio and relative EM-$psionic$ form...
The processes $h_c\to\gamma P(P = \eta^\prime,~\eta,~\pi^0)$ are studied with a sample of $(27.12\pm0.14)\times10^{8}$ $\psi(3686)$ events collected by the BESIII detector at BEPCII collider. decay $h_{c}\rightarrow\gamma\eta$ is observed for first time significance $9.0\,\sigma$, and branching fraction determined to be $(3.77\pm0.55\pm0.13\pm0.26)\times10^{-4}$, while $\mathscr{B}(h_{c}\rightarrow\gamma\eta^\prime)$ measured $(1.40\pm0.11\pm0.04\pm0.10)\times10^{-3}$, where uncertainties...
Using a sample of $448.1 \times 10^6$ $\psi(2S)$ events collected with the BESIII detector, we perform study decay $J/\psi\rightarrow K^+K^-$ via $\psi(2S)\rightarrow \pi^+\pi^-J/\psi$. The branching fraction is determined to be $\mathcal{B}_{K^+K^-}=(3.072\pm 0.023({\rm stat.})\pm 0.050({\rm syst.}))\times 10^{-4}$, which consistent previous measurements but significantly improved precision.
Using data samples with an integrated luminosity of $4.67~\mathrm{fb}^{-1}$ collected by the BESIII detector operating at BEPCII collider, we search for process $e^+e^- \rightarrow \eta' \psi(2S)$ center-of-mass energies from $4.66$ to $4.95~\mathrm{GeV}$. No significant signal is observed, and upper limits Born cross sections $\sigma^B(e^+e^-\rightarrow\eta'\psi(2S))$ 90\% confidence level are determined.