S. L. Chen
A5114155259- 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
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Particle Detector Development and Performance
- Privacy-Preserving Technologies in Data
- Stochastic Gradient Optimization Techniques
- Cryptography and Data Security
- demographic modeling and climate adaptation
- Cosmology and Gravitation Theories
- MRI in cancer diagnosis
- Reinforcement Learning in Robotics
- Prostate Cancer Diagnosis and Treatment
- Advanced Algebra and Geometry
- Coding theory and cryptography
- Crystallography and Radiation Phenomena
- Algorithms and Data Compression
- Digital Media Forensic Detection
North China Electric Power University
2023-2025
National University of Defense Technology
2024
Central China Normal University
2023
Henan University
2023
Inner Mongolia University
2023
Institute of Modern Physics
2023
University of Groningen
2023
Guangzhou Medical University
2005
Guangzhou First People's Hospital
2005
Using 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>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, which is about 45 times larger than that was previously analyzed, further investigation...
One of the main goals studying semileptonic decays in flavor physics is to gain a better understanding hadronic transitions nonperturbative region Quantum Chromodynamics. This involves measuring Cabibbo-Kobayashi-Maskawa matrix elements, form factors, and comparing them with theoretical predictions. We report first study decay <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>D</a:mi></a:mrow><a:mrow><a:mn>0</a:mn></a:mrow></a:msup><a:mo...
We perform the first amplitude analysis of D_{s}^{+}→π^{+}π^{+}π^{-}π^{0} decays based on data samples electron-positron collisions recorded with BESIII detector at center-of-mass energies between 4.128 and 4.226 GeV, corresponding to an integrated luminosity 7.33 fb^{-1}. report observation D_{s}^{+}→f_{0}(980)ρ(770)^{+} a statistical significance greater than 10σ determine branching fractions B(D_{s}^{+}→π^{+}π^{+}π^{-}π^{0}|_{non-η})=(2.04±0.08_{stat}±0.05_{syst})%...
Studies are performed of the Cabibbo-favored decay <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msubsup><a:mrow><a:mi mathvariant="normal">Λ</a:mi></a:mrow><a:mrow><a:mi>c</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msubsup><a:mo stretchy="false">→</a:mo><a:mi...
Using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>20.3</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> collision data collected at the center-of-mass energy 3.773 GeV with...
A bstract We report an improved study of the semileptonic decay $$ {D}^0\to {\overline{K}}^0{\pi}^{-}{e}^{+}{\nu}_e <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mi>D</mml:mi> <mml:mn>0</mml:mn> </mml:msup> <mml:mo>→</mml:mo> <mml:mover> <mml:mi>K</mml:mi> <mml:mo>¯</mml:mo> </mml:mover> <mml:mi>π</mml:mi> <mml:mo>−</mml:mo> <mml:mi>e</mml:mi> <mml:mo>+</mml:mo> <mml:msub> <mml:mi>ν</mml:mi> </mml:msub> </mml:math> based on a sample 7.9 fb − 1 e + annihilation...
By analyzing <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>7.93</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 at the center-of-mass energy 3.773 GeV with BESIII detector operated...
Using data samples with an integrated luminosity of 5.85 fb−1 collected at center-of-mass energies from 4.61 to 4.95 GeV the BESIII detector operating BEPCII storage ring, we measure cross section for process e+e−→K+K−J/ψ. A new resonance a mass M=4708−15+17±21 MeV/c2 and width Γ=126−23+27±30 MeV is observed in energy-dependent line shape e+e−→K+K−J/ψ significance over 5σ. The K+J/ψ system also investigated search charged charmoniumlike states, but no significant Zcs+ states are observed....
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...
A search has been performed for the semileptonic decays D0→KS0K−e+νe, D+→KS0KS0e+νe, and D+→K+K−e+νe, using 7.9 fb−1 of e+e− annihilation data collected at center-of-mass energy s=3.773 GeV by BESIII detector operating BEPCII collider. No significant signals are observed, upper limits set 90% confidence level 2.13×10−5, 1.54×10−5, 2.10×10−5 branching fractions respectively.Received 14 December 2023Accepted 28 February 2024DOI:https://doi.org/10.1103/PhysRevD.109.072003Published American...
Using a sample of 10 billion <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>J</a:mi><a:mo>/</a:mo><a:mi>ψ</a:mi></a:math> events collected with the BESIII detector, decays <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>η</c:mi><c:mo>′</c:mo></c:msup><c:mo...
We present the first observation of singly Cabibbo-suppressed decay <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msubsup><a:mi mathvariant="normal">Λ</a:mi><a:mi>c</a:mi><a:mo>+</a:mo></a:msubsup><a:mo stretchy="false">→</a:mo><a:mi mathvariant="normal">Λ</a:mi><a:msup><a:mi>K</a:mi><a:mo>+</a:mo></a:msup><a:msup><a:mi>π</a:mi><a:mn>0</a:mn></a:msup></a:math> with a significance <f:math xmlns:f="http://www.w3.org/1998/Math/MathML"...
Using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mo stretchy="false">(</a:mo><a:mn>10</a:mn><a:mn>087</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 with the BESIII detector, numerous <e:math...
We present measurements of the Born cross sections for processes e^{+}e^{-}→ωχ_{c1} and ωχ_{c2} at center-of-mass energies sqrt[s] from 4.308 to 4.951 GeV. The are performed with data samples corresponding an integrated luminosity 11.0 fb^{-1} collected BESIII detector operating Beijing Electron Positron Collider storage ring. Assuming e^{+}e^{-}→ωχ_{c2} signals come a single resonance, mass width determined be M=(4413.6±9.0±0.8) MeV/c^{2} Γ=(110.5±15.0±2.9) MeV, respectively, which is...
Unified detection of digital and physical attacks in facial recognition systems has become a focal point research recent years. However, current multi-modal methods typically ignore the intra-class inter-class variability across different types attacks, leading to degraded performance. To address this limitation, we propose MoAE-CR, framework that effectively leverages class-aware information for improved attack detection. Our improvements manifest at two levels, i.e., feature loss level. At...
Using a data sample corresponding to an integrated luminosity of <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mn>10.9</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> collected at center-of-mass energies from 4.16 4.34 GeV with the BESIII detector, we search for decay <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"...
Based on $(2712.4 \pm 14.3)\times 10^6$ $\psi(3686)$ events collected at the BESIII detector operating BEPCII collider, we present first observation of decay $\psi(3686) \to K^{-}\Lambda(1520)\bar{\Xi}^{+} + c.c.$. The product branching fraction ${\cal B}[\psi(3686) c.c.] \times {\cal B}[\Lambda(1520) pK^{-}]$ is measured to be $(9.5 0.8 1.1) 10^{-7}$, where uncertainty statistical and second systematic.
We measure the Born cross section for reaction <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:msup><a:mrow><a:mi>e</a:mi></a:mrow><a:mrow><a:mo>+</a:mo></a:mrow></a:msup><a:msup><a:mrow><a:mi>e</a:mi></a:mrow><a:mrow><a:mo>−</a:mo></a:mrow></a:msup><a:mo stretchy="false">→</a:mo><a:mi>η</a:mi><a:msub><a:mrow><a:mi>h</a:mi></a:mrow><a:mrow><a:mi>c</a:mi></a:mrow></a:msub></a:mrow></a:math> from <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"...
Using a sample of $(10087\pm44)\times10^{6}$ $J/\psi$ events accumulated with the BESIII detector, we analyze decays $\eta\rightarrow\pi^+\pi^-l^+l^-$ ($l=e$ or $\mu$) via process $J/\psi\rightarrow\gamma\eta$. The branching fraction $\eta\rightarrow\pi^+\pi^-e^+e^-$ is measured to be $\mathcal{B}(\eta\rightarrow\pi^+\pi^-e^+e^-)=(3.07\pm0.12_{\rm{stat.}}\pm0.19_{\rm{syst.}}) \times10^{-4}$. No signal are observed for $\eta\rightarrow\pi^{+}\pi^{-}\mu^{+}\mu^{-}$ decay, leading an upper...
Using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>7.9</a:mn><a:mrow><a:mi mathvariant="normal">f</a:mi><a:msup><a:mi mathvariant="normal">b</a:mi><a:mrow><a:mo>−</a:mo><a:mn>1</a:mn></a:mrow></a:msup></a:mrow></a:math> of <e:math xmlns:e="http://www.w3.org/1998/Math/MathML" display="inline"><e:msup><e:mi>e</e:mi><e:mo>+</e:mo></e:msup><e:msup><e:mi>e</e:mi><e:mo>−</e:mo></e:msup></e:math> collision data collected at <g:math...
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>...
Using <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mo stretchy="false">(</a:mo><a:mrow><a:mn>2712</a:mn><a:mo>±</a:mo><a:mn>14</a:mn></a:mrow><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>2</e:mn><e:mi>S</e:mi><e:mo...
By analyzing 7.93 $\rm fb^{-1}$ of $e^+e^-$ collision data collected at the center-of-mass energy 3.773 GeV with BESIII detector operated BEPCII collider, we report observation semimuonic decays $D^+\to \bar K_1(1270)^0\mu^+\nu_\mu$ and $D^0\to K_1(1270)^-\mu^+\nu_\mu$ statistical significances $12.5\sigma$ $6.0\sigma$, respectively. Their decay branching fractions are determined to be ${\mathcal B}[D^{+}\to \bar{K}_1(1270)^0 \mu^{+}\nu_{\mu}]=(2.36\pm0.20^{+0.18}_{-0.27}\pm...