H. S. Chen
A5058787525- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Nuclear physics research studies
- Marine and Coastal Research
- Surgical Sutures and Adhesives
- Time Series Analysis and Forecasting
- Wound Healing and Treatments
- Atomic and Subatomic Physics Research
- Hydrogels: synthesis, properties, applications
- Maritime Navigation and Safety
- Computational Physics and Python Applications
University of Chinese Academy of Sciences
2017-2025
Northwest University
2025
Institute of High Energy Physics
2005-2024
Hangzhou Dianzi University
2024
University of Groningen
2023
Using a data sample collected with the BESIII detector operating at BEPCII storage ring, we observe new neutral state Z_{c}(3900)^{0} significance of 10.4σ. The mass and width are measured to be 3894.8±2.3±3.2 MeV/c^{2} 29.6±8.2±8.2 MeV, respectively, where first error is statistical second systematic. Born cross section for e^{+}e^{-}→π^{0}π^{0}J/ψ fraction it attributable π^{0}Z_{c}(3900)^{0}→π^{0}π^{0}J/ψ in range E_{c.m.}=4.19-4.42 GeV also determined. We interpret this as partner...
Based on a data sample of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mo stretchy="false">(</a:mo><a:mn>2712.4</a:mn><a:mo>±</a:mo><a:mn>14.3</a:mn><a:mo stretchy="false">)</a:mo><a:mo>×</a:mo><a:msup><a:mn>10</a:mn><a:mn>6</a:mn></a:msup><a:mi>ψ</a:mi><a:mo stretchy="false">(</a:mo><a:mn>3686</a:mn><a:mo stretchy="false">)</a:mo></a:math> events collected with the BESIII detector at BEPCII collider, M1 transition <g:math...
Based on a sample of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mo stretchy="false">(</a:mo><a:mn>448.1</a:mn><a:mo>±</a:mo><a:mn>2.9</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>6</a:mn></a:mrow></a:msup></a:mrow></a:math> <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:mrow><e:mi>ψ</e:mi><e:mo stretchy="false">(</e:mo><e:mn>3686</e:mn><e:mo...
The unrestricted development and utilization of marine resources have resulted in a series practical problems, such as the destruction ecology. wide application radar, satellites other detection equipment has gradually led to large variety large-capacity spatiotemporal trajectory data from vast number sources. In field domain awareness, there is an urgent need use relevant information technology means control monitor ships accurately classify identify ship behavior patterns through...
Using 2.92~fb$^{-1}$ of electron-positron annihilation data collected at $\sqrt{s} = 3.773$~GeV with the BESIII detector, we obtain first measurements absolute branching fraction $\mathcal{B}(D^+ \to K^0_L e^+ \nu_e) (4.481 \pm 0.027(\mathrm{stat.}) 0.103(\mathrm{sys.}))\%$ and $CP$ asymmetry $A_{CP}^{D^+ \nu_e} (-0.59 0.60(\mathrm{stat.}) 1.48(\mathrm{sys.}))\%$. From $D^+ \nu_e$ differential decay rate distribution, product hadronic form factor magnitude CKM matrix element,...
We report the first observation of Dalitz decay η′→γe+e−, based on a data sample 1.31 billion J/ψ events collected with BESIII detector. The η′ mesons are produced via J/ψ→γη′ process. ratio Γ(η′→γe+e−)/Γ(η′→γγ) is measured to be (2.13±0.09(stat)±0.07(sys))×10−2. This corresponds branching fraction B(η′→γe+e−)=(4.69±0.20(stat)±0.23(sys))×10−4. transition form factor extracted and different expressions compared dependence e+e− invariant mass. results consistent prediction vector meson...
Based on a sample of $(1310.6\ifmmode\pm\else\textpm\fi{}10.5)\ifmmode\times\else\texttimes\fi{}{10}^{6}$ $J/\ensuremath{\psi}$ events collected with the BESIII detector operating at BEPCII storage ring, partial wave analysis decay $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\gamma}\ensuremath{\phi}\ensuremath{\phi}$ is performed in order to study intermediate states. Results show that structures are predominantly ${0}^{\ensuremath{-}+}$ The existence $\ensuremath{\eta}(2225)$...
Using data samples collected with the BESIII detector at BEPCII collider center-of-mass energies ranging from 3.80 to 4.95 GeV, corresponding an integrated luminosity of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>20</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>, a measurement Born cross sections for <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...
Using data samples of ${e}^{+}{e}^{\ensuremath{-}}$ collisions collected with the BESIII detector at eight center-of-mass energy points between 3.49 and 3.67 GeV, corresponding to an integrated luminosity $670\text{ }\text{ }{\mathrm{pb}}^{\ensuremath{-}1}$, we present upper limits Born cross sections effective form factor for process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}{\overline{\mathrm{\ensuremath{\Omega}}}}^{+}$. A fit using...
By analyzing <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> annihilation data collected at center-of-mass energies between 4.128 and 4.226 GeV with the...
A bstract Based on 7.33 fb − 1 of e + collision data collected by the BESIII detector operating at BEPCII collider center-of-mass energies from 4.128 to 4.226 GeV, a search for Majorana neutrino ν m is conducted in lepton-number-violating decays $$ {D}_{\textrm{s}}^{+} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mi>D</mml:mi> <mml:mi>s</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math> → h 0 . Here, represents K or π , and {K}_S^0 <mml:mi>K</mml:mi>...
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...
Precision measurements of the semileptonic decays Ds+→ηe+νe and Ds+→η′e+νe are performed with 7.33 fb−1 e+e− collision data collected at center-of-mass energies between 4.128 4.226 GeV BESIII detector. The branching fractions obtained B(Ds+→ηe+νe)=(2.255±0.039stat±0.051syst)% B(Ds+→η′e+νe)=(0.810±0.038stat±0.024syst)%. Combining these results B(D+→ηe+νe) B(D+→η′e+νe) from previous measurements, η−η′ mixing angle in quark flavor basis is determined to be ϕP=(40.0±2.0stat±0.6syst)°. Moreover,...
Using data samples collected at center-of-mass energies $\sqrt{s} = 4.23$, 4.26, and 4.36 GeV with the BESIII detector operating BEPCII storage ring, we search for production of charmoniumlike state $Y(4140)$ through a radiative transition followed by its decay to $\phi J/\psi$. No significant signal is observed upper limits on $\sigma[e^{+} e^{-} \rightarrow \gamma Y(4140)] \cdot \mathcal{B}(Y(4140)\rightarrow \phi J/\psi)$ $90\%$ confidence level are estimated as 0.35, 0.28, 0.33 pb GeV,...
The first observation of the decays <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>J</a:mi><a:mo>/</a:mo><a:mi>ψ</a:mi><a:mo stretchy="false">→</a:mo><a:mover accent="true"><a:mrow><a:mi>p</a:mi></a:mrow><a:mrow><a:mo stretchy="false">¯</a:mo></a:mrow></a:mover><a:msup><a:mrow><a:mi...
Based on <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mo stretchy="false">(</a:mo><a:mn>27.12</a:mn><a:mo>±</a:mo><a:mn>0.14</a:mn><a:mo stretchy="false">)</a:mo><a:mo>×</a:mo><a:msup><a:mn>10</a:mn><a:mn>8</a:mn></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:math> events collected by the BESIII detector, we search for decay <g:math...
The study of the Cabibbo-favored semileptonic decay ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}\ensuremath{\rightarrow}\mathrm{\ensuremath{\Lambda}}{\ensuremath{\mu}}^{+}{\ensuremath{\nu}}_{\ensuremath{\mu}}$ is reported using $4.5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data collected at center-of-mass energies ranging from 4.600 to 4.699 GeV. branching fraction measured be...
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...
We observe for the first time process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}\ensuremath{\eta}{h}_{c}$ with data collected by BESIII experiment. Significant signals are observed at center-of-mass energy $\sqrt{s}=4.226\text{ }\text{ }\mathrm{GeV}$, and Born cross section is measured to be $(9.{5}_{\ensuremath{-}2.0}^{+2.2}\ifmmode\pm\else\textpm\fi{}2.7)\text{ }\mathrm{pb}$. Evidence $\ensuremath{\eta}{h}_{c}$ $\sqrt{s}=4.358\text{ }\mathrm{GeV}$ a of...
Using 4.479×10^{8} ψ(3686) events collected with the BESIII detector, we search for decays ψ(3686)→e^{+}e^{-}χ_{cJ} and χ_{cJ}→e^{+}e^{-}J/ψ, where J=0, 1, 2. The χ_{cJ}→e^{+}e^{-}J/ψ are observed first time. measured branching fractions B(ψ(3686)→e^{+}e^{-}χ_{cJ})=(11.7±2.5±1.0)×10^{-4}, (8.6±0.3±0.6)×10^{-4}, (6.9±0.5±0.6)×10^{-4} 2, B(χ_{cJ}→e^{+}e^{-}J/ψ)=(1.51±0.30±0.13)×10^{-4}, (3.73±0.09±0.25)×10^{-3}, (2.48±0.08±0.16)×10^{-3} respectively. ratios of...
Using a data sample of (1310.6±7.0)×106 J/ψ events collected with the BESIII detector operating at BEPCII collider, we perform first experimental search for invisible decays light vector meson (V=ω, ϕ) via J/ψ→Vη decays. The decay η→π+π−π0 is utilized to tag V decaying into final state. No evidence significant signal observed, and upper limits on ratio branching fractions 90% confidence level are determined be B(ω→invisible)B(ω→π+π−π0)<8.1×10−5 B(ϕ→invisible)B(ϕ→K+K−)<3.4×10−4. By using...
This paper reports the study of Ds+→τ+ν via τ+→π+ν¯τ using a boosted decision tree method, with 7.33 fb−1 e+e− collision data collected by BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV. The branching fraction Ds+→τ+ντ is determined to be (5.44±0.17stat±0.13syst)%. product Ds+ decay constant fDs+ Cabibbo-Kobayashi-Maskawa matrix element |Vcs| fDs+|Vcs|=(248.3±3.9stat±3.1syst±1.0input) MeV. Combining value obtained from Standard Model global fit or lattice quantum...
Using a data sample of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mo stretchy="false">(</a:mo><a:mn>10087</a:mn><a:mo>±</a:mo><a:mn>44</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>6</a:mn></a:mrow></a:msup><a:mtext> </a:mtext><a:mtext> </a:mtext><a:mi>J</a:mi><a:mo>/</a:mo><a:mi>ψ</a:mi></a:mrow></a:math> events collected by the BESIII detector in 2009, 2012, 2018 and 2019, electromagnetic...
A bstract Using (27 . 12 ± 0 14) × 10 8 ψ (3686) events collected with the BESIII detector at BEPCII, decay of → $$ {\varOmega}^{-}{K}^{+}{\overline{\Xi}}^0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>Ω</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:mi>K</mml:mi> <mml:mo>+</mml:mo> <mml:mover> <mml:mi>Ξ</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mn>0</mml:mn> </mml:math> + c is observed for first time. The branching fraction this measured to be...