A5044172630- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Computational Physics and Python Applications
- Cancer, Hypoxia, and Metabolism
- Cosmology and Gravitation Theories
- Nuclear physics research studies
- Biochemical and Molecular Research
- Enzyme Structure and Function
- Stochastic processes and statistical mechanics
- Islamic Thought and Society Studies
- Geotechnical Engineering and Analysis
- Colorectal Cancer Treatments and Studies
- International Science and Diplomacy
- Radiation Detection and Scintillator Technologies
- Plant Surface Properties and Treatments
- Eurasian Exchange Networks
Northeast Electric Power University
2025
Central China Normal University
2020-2025
Peking University
2004-2025
State Key Laboratory of Nuclear Physics and Technology
2013-2025
University of Science and Technology of China
2021-2025
University of Chinese Academy of Sciences
2023
University of Edinburgh
2016-2023
University of South China
2019-2021
Institute of High Energy Physics
2015-2020
Tsinghua University
2003-2019
We study the process ee+ e- → π+ π- J/ψ at a center-of-mass energy of 4.260 GeV using 525 pb(-1) data sample collected with BESIII detector operating Beijing Electron Positron Collider. The Born cross section is measured to be (62.9±1.9±3.7) pb, consistent production Y(4260). observe structure around 3.9 GeV/c2 in π(±)J/ψ mass spectrum, which we refer as Z(c)(3900). If interpreted new particle, it unusual that carries an electric charge and couples charmonium. A fit invariant neglecting...
With data samples collected with the BESIII detector operating at BEPCII storage ring center-of-mass energies from 4.009 to 4.420 GeV, process e+e-→ γX(3872) is observed for first time a statistical significance of 6.3σ. The measured mass X(3872) (3871.9 ± 0.7s tat 0.2 syst) MeV/c(2), in agreement previous measurements. Measurements product cross section σ[e+e- → γX(3872)] and branching fraction B[X(3872)→π+π-J/ψ] 4.009, 4.229, 4.260, 4.360 GeV are reported. Our measurements consistent...
One of the most challenging open problems in heavy quarkonium physics is double charm production e+e- annihilation at B factories. The measured cross section --> J/psi + eta(c) much larger than leading order (LO) theoretical predictions. With nonrelativistic QCD factorization formalism, we calculate next-to-leading (NLO) correction to this process. Taking all one loop self-energy, triangle, box, and pentagon diagrams into account, factoring Coulomb-singular term cc bound state wave function,...
From December 2011 to May 2014, about 5 fb−1 of data were taken with the BESIII detector at center-of-mass energies between 3.810 GeV and 4.600 study charmonium-like states higher excited charmonium states. The time-integrated luminosity collected sample is measured a precision 1% by analyzing events produced large-angle Bhabha scattering process.
Based on data samples collected with the BESIII detector at BEPCII collider nine center of mass energies from 4.21 to 4.42 GeV, we search for production e^{+}e^{-}→ωχ_{cJ} (J=0, 1, 2). The process e^{+}e^{-}→ωχ_{c0} is observed first time, and Born cross sections sqrt[s]=4.23 4.26 GeV are measured be (55.4±6.0±5.9) (23.7±5.3±3.5) pb, respectively, where uncertainties statistical second systematic. ωχ_{c0} signals other seven e^{+}e^{-}→ωχ_{c1} ωχ_{c2} not significant, upper limits...
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...
Abstract Using inclusive decays of , a precise determination the number events collected with BESIII detector was performed. For two data sets taken in 2009 and 2012, numbers were recalculated to be respectively; these are good agreement previous measurements. sample 2017–2019, determined . The total where uncertainty is dominated by systematic effects, statistical negligible.
Using 13.5 inverse fb of e+e- annihilation data collected with the CLEO II detector we have observed a narrow resonance in Ds*+pi0 final state, mass near 2.46 GeV. The search for such state was motivated by recent discovery BaBar Collaboration at 2.32 GeV, DsJ*(2317)+ that decays to Ds+pi0. Reconstructing Ds+pi0 and states data, observe peaks both corresponding reconstructed difference distributions, dM(Dspi0)=M(Dspi0)-M(Ds) dM(Ds*pi0)=M(Ds*pi0)-M(Ds*), them values 350 MeV. We interpret...
We report the observation of X(3823) state in process e+e-→π+π-X(3823)→π+π-γχc1 with a statistical significance 6.2σ, data samples at center-of-mass energies sqrt[s]=4.230, 4.260, 4.360, 4.420, and 4.600 GeV collected BESIII detector BEPCII electron positron collider. The measured mass is (3821.7±1.3±0.7) MeV/c2, where first error second systematic, width less than 16 MeV 90% confidence level. products Born cross sections for e+e-→π+π-X(3823) branching ratio B[X(3823)→γχc1,c2] are also...
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...
$B\to\chi_{c1}(1P,2P)K$ decays are studied in QCD factorization by treating charmonia as nonrelativistic bound states. No infrared divergences exist the vertex corrections, while logarithmic end-point singularities hard spectator corrections can be regularized a momentum cutoff. With certain uncertainties we find that $B\to\chi_{c1}(2P)K$ decay rate comparable to $B\to\chi_{c1}(1P)K$, and get $Br(B^0 \to \chi_{c1}' K^0) =Br(B^+ K^+)\approx 2\times 10^{-4}$. This might imply possible...
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...
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....
Based on an e^{+}e^{-} collision data sample corresponding to integrated luminosity of 567 pb^{-1} taken at the center-of-mass energy sqrt[s]=4.6 GeV with BESIII detector, we measure absolute branching fraction inclusive decay Λ_{c}^{+}→Λ+X be B(Λ_{c}^{+}→Λ+X)=(38.2_{-2.2}^{+2.8}±0.9)% using double-tag method, where X refers any possible final state particles. In addition, search for direct CP violation in charge asymmetry this first time, and obtain A_{CP}≡[B(Λ_{c}^{+}→Λ+X)-B(Λ[over...
Using 448.1 $\times$ $10^{6}$ $ψ(3686)$ events collected with the BESIII detector at BEPCII, we employ a single-baryon tagging technique to make first observation of $ψ(3686)\rightarrowΞ(1530)^{-}\barΞ(1530)^{+}$ and $Ξ(1530)^{-}\barΞ^{+}$ decays statistical significance more than 10$σ$ 5.0$σ$, respectively. The branching fractions are measured be $\cal{B}$$[ψ(3686)\rightarrowΞ(1530)^{-}\barΞ(1530)^{+}] $ = (11.45 $\pm$ 0.40 0.59) $10^{-5}$ $\cal{B}$$[ψ(3686)\rightarrowΞ(1530)^{-}\barΞ^{+}]$...
Abstract Using a sample of $$1.31\times 10^{9} ~J/\psi $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>1.31</mml:mn><mml:mo>×</mml:mo><mml:msup><mml:mn>10</mml:mn><mml:mn>9</mml:mn></mml:msup><mml:mspace /><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>ψ</mml:mi></mml:mrow></mml:math> events collected with the BESIII detector, we perform study $$J/\psi \rightarrow \gamma K{\bar{K}}\eta '$$...
A bstract The decays D → K − π + and 0 are studied in a sample of quantum-correlated $$ D\overline{D} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>D</mml:mi> <mml:mover> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> pairs produced through the process e ψ (3770) , exploiting data set collected by BESIII experiment that corresponds to an integrated luminosity 2.93 fb 1 . Here indicates quantum superposition {\overline{D}}^0 <mml:msup> <mml:mn>0</mml:mn> </mml:msup> meson. By...
We report a measurement of the parameter $y_{CP}$ in $\ensuremath{D^0}\xspace-\ensuremath{\overline{D}^{0}}\xspace$ oscillations performed by taking advantage quantum coherence between pairs $\ensuremath{D^0}\xspace \ensuremath{\overline{D}^{0}}\xspace$ mesons produced $e^+e^-$ annihilations near threshold. In this work, doubly-tagged events, where one $D$ decays to $CP$ eigenstate and other semileptonic mode, are reconstructed using data sample 2.92\,fb$^{-1}$ collected with BESIII detector...
In the framework of QCD factorization, we study B-meson exclusive decays $\stackrel{\ensuremath{\rightarrow}}{B}{\ensuremath{\chi}}_{\mathrm{cJ}}K$ where spin-triplet P-wave charmonium states ${\ensuremath{\chi}}_{\mathrm{cJ}}(J=0,1,2)$ are described by color-singlet nonrelativistic wave functions. We find that for these (except ${\ensuremath{\chi}}_{c1})$ there infrared divergences arising from nonfactorizable vertex corrections as well logarithmic end-point singularities spectator...
We measure the inclusive semielectronic decay branching fraction of $D_s^+$ meson. A double-tag technique is applied to $e^+e^-$ annihilation data collected by BESIII experiment at BEPCII collider, operating in center-of-mass energy range $4.178 - 4.230$ GeV. select positrons from $D_s^+\rightarrow Xe^{+}\nu_e$ with momenta greater than 200 MeV/$c$, and determine laboratory momentum spectrum, accounting for effects detector efficiency resolution. The total positron yield are determined...
By analyzing 482 pb$^{-1}$ of $e^+e^-$ collision data collected at the center-of-mass energy $\sqrt s=4.009$ GeV with BESIII detector, we measure %absolute branching fractions for semi-leptonic decays $D_{s}^{+}\to \phi e^{+}\nu_{e}$, $\phi \mu^{+}\nu_{\mu}$, $\eta \mu^{+}\nu_{\mu}$ and $\eta'\mu^{+}\nu_{\mu}$ to be ${\mathcal B}(D_{s}^{+}\to\phi e^{+}\nu_{e})=(2.26\pm0.45\pm0.09)$\%, \mu^{+}\nu_{\mu})=(1.94\pm0.53\pm0.09)$\%, B}(D_{s}^{+}\to\eta \mu^{+}\nu_{\mu})=(2.42\pm0.46\pm0.11)$\%...
Using an e+e− annihilation data sample corresponding to integrated luminosity of 3.19 fb−1 and collected at a center-of-mass energy √s=4.178 GeV with the BESIII detector, we measure absolute branching fractions B(D+s→K0SK+)=(1.425±0.038stat.±0.031syst.)% B(D+s→K0LK+)=(1.485±0.039stat.±0.046syst.)%. The fraction D+s→K0SK+ is compatible world average that D+s→K0LK+ measured for first time. We present measurement K0S−K0L asymmetry in decays D+s→K0S,LK+,...
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...