A5075895196- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Nuclear physics research studies
- Dark Matter and Cosmic Phenomena
- Global Energy and Sustainability Research
- Neurotransmitter Receptor Influence on Behavior
- Environmental Changes in China
- Computational Physics and Python Applications
- Ammonia Synthesis and Nitrogen Reduction
- Colorectal Cancer Surgical Treatments
- Particle Accelerators and Free-Electron Lasers
- Topic Modeling
- Geographic Information Systems Studies
- Advanced NMR Techniques and Applications
- Colorectal and Anal Carcinomas
- Colorectal Cancer Screening and Detection
- Advanced Text Analysis Techniques
- Black Holes and Theoretical Physics
- Recommender Systems and Techniques
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Geochemistry and Elemental Analysis
- Remote Sensing and Land Use
- Neuroscience and Neuropharmacology Research
New York University
2025
Tsinghua University
2025
Nankai University
2019-2024
Chongqing University of Technology
2023
Union Hospital
2016
Jilin University
2016
We report a study of the processes e+e−→K+D−sD*0 and K+D*−sD0 based on e+e− annihilation samples collected with BESIII detector operating at BEPCII five center-of-mass energies ranging from 4.628 to 4.698 GeV total integrated luminosity 3.7 fb−1. An excess events over known contributions conventional charmed mesons is observed near D−sD*0 D*−sD0 mass thresholds in K+ recoil-mass spectrum for √s=4.681 GeV. The structure matches mass-dependent-width Breit-Wigner line shape, whose pole width...
The process of $e^+e^- \rightarrow p\bar{p}$ is studied at 22 center-of-mass energy points ($\sqrt{s}$) from 2.00 to 3.08 GeV, exploiting 688.5~pb$^{-1}$ data collected with the BESIII detector operating BEPCII collider. Born cross section~($\sigma_{p\bar{p}}$) measured energy-scan technique and it found be consistent previously published data, but much improved accuracy. In addition, electromagnetic form-factor ratio ($|G_{E}/G_{M}|$) value effective ($|G_{\rm{eff}}|$), electric ($|G_E|$)...
We study the e^{+}e^{-}→γωJ/ψ process using 11.6 fb^{-1} e^{+}e^{-} annihilation data taken at center-of-mass energies from sqrt[s]=4.008 GeV to 4.600 with BESIII detector BEPCII storage ring. The X(3872) resonance is observed for first time in ωJ/ψ system a significance of more than 5σ. relative decay ratio X(3872)→ωJ/ψ and π^{+}π^{-}J/ψ measured be R=1.6_{-0.3}^{+0.4}±0.2, where uncertainty statistical second systematic (the same hereafter). sqrt[s]-dependent cross section...
From 1310.6×10^{6} J/ψ and 448.1×10^{6} ψ(3686) events collected with the BESIII experiment, we report first observation of Σ^{+} Σ[over ¯]^{-} spin polarization in e^{+}e^{-}→J/ψ[ψ(3686)]→Σ^{+}Σ[over decays. The relative phases form factors ΔΦ have been measured to be (-15.5±0.7±0.5)° (21.7±4.0±0.8)° data, respectively. nonzero value allows for a direct simultaneous measurement decay asymmetry parameters Σ^{+}→pπ^{0}(α_{0}=-0.998±0.037±0.009) ¯]^{-}→p[over ¯]π^{0}(α[over...
Using a total of 9.0 fb^{-1} e^{+}e^{-} collision data with center-of-mass energies between 4.15 and 4.30 GeV collected by the BESIII detector, we search for processes e^{+}e^{-}→γX(3872) X(3872)→π^{0}χ_{cJ} J=0, 1, 2. We report first observation X(3872)→π^{0}χ_{c1}, new decay mode X(3872), statistical significance more than 5σ all systematic fit variations. Normalizing to previously established process X(3872)→π^{+}π^{-}J/ψ, find...
Using $e^{+}e^{-}$ collision data samples with center-of-mass energies ranging from 2.000 to 2.644 GeV, collected by the BESIII detector at BEPCII collider, and a total integrated luminosity of 300 pb^{-1}, partial-wave analysis is performed for process $e^{+}e^{-} \to K^{+}K^{-}\pi^{0}\pi^{0}$. The Born cross sections K^{+}K^{-}\pi^{0}\pi^{0}$, as well f or subprocesses \phi \pi^{0}\pi^{0}$, $K^{+}(1460)K^{-}$, $K^{+}_{1}(1400)K^{-}$, $K^{+}_{1}(1270)K^{-}$ $K^{*+}(892)K^{*-}(892)$, are...
The Born cross-sections and effective form factors for process $e^+e^-\to\Xi^-\bar{\Xi}^+$ are measured at eight center-of-mass energies between 2.644 3.080 GeV, using a total integrated luminosity of 363.9 pb$^{-1}$ $e^+e^-$ collision data collected with the BESIII detector BEPCII. After performing fit to cross-section $e^+e^-\to\Xi^-\bar{\Xi}^+$, no significant threshold effect is observed.
Using $e^+e^-$ annihilation data corresponding to a total integrated luminosity of 6.32 $\rm fb^{-1}$ collected at center-of-mass energies between 4.178 and 4.226 GeV with the BESIII detector, we perform an amplitude analysis decay $D_{s}^{+} \to K_{S}^{0}K_{S}^{0}\pi^{+}$ for first time. An enhancement is observed in $K_{S}^{0}K_{S}^{0}$ mass spectrum near 1.7 GeV/$c^2$, which was not seen K^+K^-\pi^{+}$ earlier work, implying existence isospin one partner $f_0(1710)$. The branching...
The process e+e−→ϕη′ has been studied for the first time in detail using data sample collected with BESIII detector at BEPCII collider center of mass energies from 2.05 to 3.08 GeV. A resonance quantum numbers JPC=1−− is observed M=(2177.5±4.8(stat)±19.5(syst))MeV/c2 and width Γ=(149.0±15.6(stat)±8.9(syst)) MeV a statistical significance larger than 10σ, including systematic uncertainties. If structure identified ϕ(2170), then ratio partial between ϕη′ by ϕη BABAR...
The processes X(3872)→D^{*0}D[over ¯]^{0}+c.c.,γJ/ψ,γψ(2S), and γD^{+}D^{-} are searched for in a 9.0 fb^{-1} data sample collected at center-of-mass energies between 4.178 4.278 GeV with the BESIII detector. We observe X(3872)→D^{*0}D^{0}[over ¯]+c.c. find evidence X(3872)→γJ/ψ statistical significances of 7.4σ 3.5σ, respectively. No evident signals X(3872)→γψ(2S) found, upper limit on relative branching ratio R_{γψ}≡{B[X(3872)→γψ(2S)]}/{B[X(3872)→γJ/ψ]}<0.59 is set 90% confidence level....
We report an amplitude analysis and branching fraction measurement of ${D}_{s}^{+}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decay using a data sample $3.19\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ recorded with BESIII detector at center-of-mass energy 4.178 GeV. perform model-independent partial wave in the low ${K}^{+}{K}^{\ensuremath{-}}$ mass region to determine S-wave line shape, followed by our very pure high-statistics sample. With detection...
Using $e^+e^-\to\Lambda_c^+\bar\Lambda_c^-$ production from a 567 pb$^{-1}$ data sample collected by BESIII at 4.6 GeV, full angular analysis is carried out simultaneously on the four decay modes of $\Lambda_c^+\to pK_S^0$, $\Lambda \pi^+$, $\Sigma^+\pi^0$, and $\Sigma^0\pi^+$. For first time, $\Lambda_c^+$ transverse polarization studied in unpolarized $e^+e^-$ collisions, where non-zero effect observed with statistical significance 2.1$\sigma$. The asymmetry parameters weak hadronic decays...
We present the first amplitude analysis of decay $D^{+}_{s} \rightarrow \pi^{+}\pi^{0}\eta$. use an $e^{+}e^{-}$ collision data sample corresponding to integrated luminosity 3.19~${\mbox{\,fb}^{-1}}$ collected with BESIII detector at a center-of-mass energy $4.178$ GeV. observe for time pure $W$-annihilation decays $D_{s}^{+} a_{0}(980)^{+}\pi^{0}$ and a_{0}(980)^{0}\pi^{+}$. measure absolute branching fractions $\mathcal{B}(D_{s}^{+} a_{0}(980)^{+(0)}\pi^{0^(+)}, a_{0}(980)^{+(0)} \to...
Using data samples with a total integrated luminosity of $20.1\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the BESIII detector operating at BEPCII collider, cross section process ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}\ensuremath{\psi}(3686)$ is measured center-of-mass energies between 4.0076 and 4.6984 GeV. The consistent previous results, much improved precision. A fit to energy-dependent section, which...
We report the first observation of D^{+}→τ^{+}ν_{τ} with a significance 5.1σ. measure B(D^{+}→τ^{+}ν_{τ})=(1.20±0.24_{stat}±0.12_{syst})×10^{-3}. Taking world average B(D^{+}→μ^{+}ν_{μ})=(3.74±0.17)×10^{-4}, we obtain R_{τ/μ}=Γ(D^{+}→τ^{+}ν_{τ})/Γ(D^{+}→μ^{+}ν_{μ})=3.21±0.64_{stat}±0.43_{syst}., which is consistent standard model expectation lepton flavor universality. Using external inputs, our results give values for D^{+} decay constant f_{D^{+}} and Cabibbo-Kobayashi-Maskawa matrix...
By analyzing a data sample corresponding to an integrated luminosity of 2.93 fb^{-1} collected at center-of-mass energy 3.773 GeV with the BESIII detector, we measure for first time absolute branching fraction D^{+}→ημ^{+}ν_{μ} decay be B_{D^{+}→ημ^{+}ν_{μ}}=(10.4±1.0_{stat}±0.5_{syst})×10^{-4}. Using world averaged value B_{D^{+}→ηe^{+}ν_{e}}, ratio two fractions is determined B_{D^{+}→ημ^{+}ν_{μ}}/B_{D^{+}→ηe^{+}ν_{e}}=0.91±0.13_{(stat+syst)}, which agrees theoretical expectation lepton...
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...
By analyzing $6.32\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data collected at the center-of-mass energies between 4.178 and 4.226 GeV with BESIII detector, we determine branching fraction leptonic decay ${D}_{s}^{+}\ensuremath{\rightarrow}{\ensuremath{\tau}}^{+}{\ensuremath{\nu}}_{\ensuremath{\tau}}$,...
Based on $4.481\ifmmode\times\else\texttimes\fi{}{10}^{8}\text{ }\text{ }\ensuremath{\psi}(3686)$ events collected with the BESIII detector at BEPCII, branching fraction of isospin violating decay $\ensuremath{\psi}(3686)\ensuremath{\rightarrow}{\overline{\mathrm{\ensuremath{\Sigma}}}}^{0}\mathrm{\ensuremath{\Lambda}}+\mathrm{c}.\mathrm{c}.$ is measured to be...
Using $2.93 \rm fb^{-1}$ of $e^+e^-$ collision data collected at a center-of-mass energy 3.773 GeV with the BESIII detector, first observation doubly Cabibbo-suppressed decay $D^+\to K^+\pi^+\pi^-\pi^0$ is reported. After removing decays that contain narrow intermediate resonances, including K^+\eta$, K^+\omega$, and K^+\phi$, branching fraction measured to be $(1.13 \pm 0.08_{\rm stat} 0.03_{\rm syst})\times 10^{-3}$. The ratio fractions over K^-\pi^+\pi^+\pi^0$ found $(1.81\pm0.15)$\%,...
Using 6.32 fb−1 of electron-positron collision data recorded by the BESIII detector at center-of-mass energies between 4.178 and 4.226 GeV, we present first search for decay D+s→a0(980)0e+νe, a0(980)0→π0η, which could proceed via a0(980)−f0(980) mixing. No significant signal is observed. An upper limit 1.2×10−4 90% confidence level set on product branching fractions D+s→a0(980)0e+νe a0(980)0→π0η decays.Received 22 March 2021Accepted 30...
Using a sample of about 10^{10} J/ψ events collected at center-of-mass energy sqrt[s]=3.097 GeV with the BESIII detector, electromagnetic Dalitz decays J/ψ→e^{+}e^{-}π^{+}π^{-}η^{'}, η^{'}→γπ^{+}π^{-} and η^{'}→π^{+}π^{-}η, have been studied. The decay J/ψ→e^{+}e^{-}X(1835) is observed significance 15σ, also an e^{+}e^{-} invariant-mass dependent transition form factor presented for first time. intermediate states X(2120) X(2370) are in π^{+}π^{-}η^{'} spectrum significances 5.3σ 7.3σ....