A5101441999- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Nuclear reactor physics and engineering
- Particle Accelerators and Free-Electron Lasers
- Nuclear physics research studies
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Fusion materials and technologies
- Computational Physics and Python Applications
- Black Holes and Theoretical Physics
- Nuclear Materials and Properties
- Neutrino Physics Research
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Stochastic processes and statistical mechanics
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- Plasma and Flow Control in Aerodynamics
- Medical Imaging Techniques and Applications
- Laser-Plasma Interactions and Diagnostics
- Advanced Data Storage Technologies
- Appendicitis Diagnosis and Management
- Statistical Mechanics and Entropy
- dental development and anomalies
Institute of Modern Physics
2020-2025
Hunan City University
2025
Air Force Medical University
2024
Chinese Academy of Sciences
2020-2024
Ball State University
2023-2024
Argonne National Laboratory
2023-2024
Guangxi Normal University
2024
Brookhaven National Laboratory
2023-2024
Huzhou University
2024
Central China Normal University
2024
Non-monotonic variation with collision energy ($\sqrt{s_{\rm NN}}$) of the moments net-baryon number distribution in heavy-ion collisions, related to correlation length and susceptibilities system, is suggested as a signature for Quantum Chromodynamics (QCD) critical point. We report first evidence non-monotonic kurtosis times variance net-proton (proxy number) function \rootsnn 3.1$\sigma$ significance, head-on (central) gold-on-gold (Au+Au) collisions measured using STAR detector at RHIC....
The Breit-Wheeler process which produces matter and anti-matter from photon collisions is investigated experimentally through the observation of 6085 exclusive electron-positron pairs in ultra-peripheral Au+Au at $\sqrt{s_{_{NN}}}=200$ GeV. measurements reveal a large fourth-order angular modulation $\cos{4\Delta\phi}=(16.8\pm2.5)\%$ smooth invariant mass distribution absent vector mesons ($\phi$, $\omega$ $\rho$) experimental limit $\le 0.2\%$ observed yields. differential cross section as...
The strong force, as one of the four fundamental forces at work in universe, governs interactions quarks and gluons, binds together atomic nucleus. Notwithstanding decades progress since Yukawa first developed a description force between nucleons terms meson exchange, full understanding interaction remains major challenge modern science. One remaining difficulty arises from non-perturbative nature which leads to phenomenon quark confinement distance scales on order size proton. Here we show...
In heavy-ion collision experiments, the global collectivity of final-state particles can be quantified by anisotropic flow coefficients (𝑣𝑛). The first-order coefficient, also referred to as directed (𝑣1), describes collective sideward motion produced and nuclear fragments in collisions. It carries information on very early stage collision, especially at large pseudorapidity (𝜂), where it is believed generated during passage time. Directed therefore probes onset bulk dynamics thermalization,...
We present the results of an amplitude analysis anti-B0 -> J/psi K- pi+ decays. A new charged charmoniumlike state Zc(4200)+ decaying to is observed with a significance 6.2 sigma. The mass and width are 4196 +31-29 +17-13 MeV/c^2 370 +70-70 +70-132 MeV, respectively; preferred assignment quantum numbers J^P = 1^+. In addition, we find evidence for Zc(4430)+ pi+. based on 711 fb^-1 data sample collected by Belle detector at asymmetric-energy e+ e- collider KEKB.
Global polarization of Ξ and Ω hyperons has been measured for the first time in Au+Au collisions at sqrt[s_{NN}]=200 GeV. The measurements Ξ^{-} Ξ[over ¯]^{+} hyperon have performed by two independent methods, via analysis angular distribution daughter particles parity violating weak decay Ξ→Λ+π, as well measuring Λ hyperon, polarized transfer from its parent. polarization, obtained combining results methods averaged over ¯]^{+}, is to be ⟨P_{Ξ}⟩=0.47±0.10(stat)±0.23(syst)% collision...
We report on the first measurement of charmed baryon Λ_{c}^{±} production at midrapidity (|y|<1) in Au+Au collisions sqrt[s_{NN}]=200 GeV collected by STAR experiment Relativistic Heavy Ion Collider. The Λ_{c}/D^{0} [denoting (Λ_{c}^{+}+Λ_{c}^{-})/(D^{0}+D[over ¯]^{0})] yield ratio is measured to be 1.08±0.16 (stat)±0.26 (sys) 0%-20% most central for transverse momentum (p_{T}) range 3<p_{T}<6 GeV/c. This significantly larger than pythia model calculations p+p collisions. ratio, as a...
We report the triton ($t$) production in mid-rapidity ($|y| <$ 0.5) Au+Au collisions at $\sqrt{s_\mathrm{NN}}$= 7.7--200 GeV measured by STAR experiment from first phase of beam energy scan Relativistic Heavy Ion Collider (RHIC). The nuclear compound yield ratio ($\mathrm{N}_t \times \mathrm{N}_p/\mathrm{N}_d^2$), which is predicted to be sensitive fluctuation local neutron density, observed decrease monotonically with increasing charged-particle multiplicity ($dN_{ch}/d\eta$) and follows a...
We report the beam energy and collision centrality dependence of fifth sixth order cumulants (C5, C6) factorial (κ5, κ6) net-proton proton number distributions, from center-of-mass (√sNN) 3 GeV to 200 Au+Au collisions at RHIC. Cumulant ratios (taken as proxy for net-baryon) distributions generally follow hierarchy expected QCD thermodynamics, except case GeV. The measured values C6/C2 0%–40% show progressively negative trend with decreasing energy, while it is positive lowest studied. These...
We report results of a study doubly charmed baryons and strange baryons. The analysis is performed using $980\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data sample collected with the Belle detector at KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. search for ${\mathrm{\ensuremath{\Xi}}}_{cc}^{+(+)}$ ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}({\ensuremath{\pi}}^{+})$...
We report results on studies of the e+e- annihilation into three-body Y(nS)pi+pi- (n=1,2,3) final states including measurements cross sections and full amplitude analysis. The measured at sqrt(s)=10.865 GeV corrected for initial state radiation are sigma(e+e-=>Y(1S)pi+pi-)=(2.27+-0.12+-0.14) pb, sigma(e+e-=>Y(2S)pi+pi-)=(4.07+-0.16+-0.45) sigma(e+e-=>Y(3S)pi+pi-)=(1.46+-0.09+-0.16) pb. Amplitude analysis strongly favors I^G(J^P)=1^+(1^+) quantum-number assignments two bottomonium-like Zb+-...
In high-energy heavy-ion collisions, partonic collectivity is evidenced by the constituent quark number scaling of elliptic flow anisotropy for identified hadrons. A breaking this and dominance baryonic interactions found hadron collective measurements in $\sqrt{s_{\rm NN}}$ = 3 GeV Au+Au collisions. paper, we report first- second-order azimuthal anisotropic parameters, $v_1$ $v_2$, light nuclei ($d$, $t$, $^{3}$He, $^{4}$He) produced collisions at STAR experiment. An atomic mass measured...
The dark photon ${A}^{\ensuremath{'}}$ and the Higgs boson ${h}^{\ensuremath{'}}$ are hypothetical constituents featured in a number of recently proposed sector models. Assuming prompt decays both particles, we search for their production so-called Higgstrahlung channel ${e}^{+}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{A}^{\ensuremath{'}}{h}^{\ensuremath{'}}$, with ${h}^{\ensuremath{'}}\ensuremath{\rightarrow}{A}^{\ensuremath{'}}{A}^{\ensuremath{'}}$. We investigate ten exclusive final...
We report a measurement of the differential cross section ${\ensuremath{\pi}}^{0}$ pair production in single-tag two-photon collisions, ${\ensuremath{\gamma}}^{*}\ensuremath{\gamma}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}{\ensuremath{\pi}}^{0}$, ${e}^{+}{e}^{\ensuremath{-}}$ scattering. The is measured for ${Q}^{2}$ up to $30\text{ }\text{ }{\mathrm{GeV}}^{2}$, where negative invariant mass squared tagged photon, kinematic range $0.5\text{ }\mathrm{GeV}<W<2.1\text{ }\mathrm{GeV}$ and...
The STAR Collaboration at the Relativistic Heavy Ion Collider reports first measurement of inclusive jet production in peripheral and central Au+Au collisions $\sqrt{{s}_{NN}}=200$ GeV. Jets are reconstructed with anti-${k}_{T}$ algorithm using charged tracks pseudorapidity $|\ensuremath{\eta}|<1.0$ transverse momentum $0.2<{p}_{T,\mathrm{jet}}^{\mathrm{ch}}<30$ $\mathrm{GeV}/c$, resolution parameter $R=0.2$, 0.3, 0.4. large background yield uncorrelated signal is observed to be dominated by...
In relativistic heavy-ion collisions, a global spin polarization, $P_\mathrm{H}$, of $\Lambda$ and $\bar{\Lambda}$ hyperons along the direction system angular momentum was discovered measured across broad range collision energies demonstrated trend increasing $P_\mathrm{H}$ with decreasing $\sqrt{s_{\rm NN}}$. A splitting between polarization may be possible due to their different magnetic moments in late-stage field sustained by quark-gluon plasma which is formed collision. The results...
With the acceleration of social development and urbanization, birds’ natural habitats have been greatly disturbed threatened. Satellite tracking technology can collect much bird activity data, providing important data support for habitat protection research. However, satellite are usually characterized by discontinuity, extensive periods, inconsistent frequency, which challenges cluster analysis. Habitat research frequently employs clustering techniques, but conventional algorithms struggle...
The $e^+e^- \to \pi^+ \pi^- \pi^0 \chi_{bJ}$ ($J=0,~1,~2$) processes are studied using a 118~fb$^{-1}$ data sample collected at center-of-mass energy of 10.867 GeV, in the $\Upsilon(10860)$ range, with Belle detector. $\pi^+ \chi_{b1}$, $\pi^+\pi^-\pi^0\chi_{b2}$, $\omega\chi_{b1}$ signals and evidence $\omega\chi_{b2}$ observed for first time cross sections measured. No significant $\pi^+\pi^-\pi^0\chi_{b0}$ or $\omega\chi_{b0}$ signal is 90\% confidence level upper limits on these two...
We report a measurement of ${D}^{0}\text{\ensuremath{-}}{\overline{D}}^{0}$ mixing parameters and search for indirect $CP$ violation through time-dependent amplitude analysis ${D}^{0}\ensuremath{\rightarrow}{K}_{S}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decays. The results are based on $921\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ data accumulated with the Belle detector at KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider. Assuming conservation, we...
In this letter, measurements of the shared momentum fraction (zg) and groomed jet radius (Rg), as defined in SoftDrop algorithm, are reported p+p collisions at s=200 GeV collected by STAR experiment. These substructure observables differentially measured for jets varying resolution parameters from R=0.2−0.6 transverse range 15<pT,jet<60 GeV/c. studies show that, pT,jet accessible with increasing parameter momentum, zg distribution asymptotically converges to DGLAP splitting kernel a quark...
We report systematic measurements of bulk properties the system created in $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{NN}}=14.5$ GeV recorded by STAR detector Relativistic Heavy Ion Collider (RHIC). The transverse momentum spectra ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}, {K}^{\ifmmode\pm\else\textpm\fi{}}$, and $p(\overline{p})$ are studied midrapidity ($|y|<0.1$) for nine centrality intervals. centrality, (${p}_{T}$), pseudorapidity ($\ensuremath{\eta}$) dependence...