A5079708328- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Magnetic confinement fusion research
- Nuclear reactor physics and engineering
- Ionosphere and magnetosphere dynamics
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Fusion materials and technologies
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- Nuclear physics research studies
- Laser-induced spectroscopy and plasma
- Radiation Detection and Scintillator Technologies
- Metal and Thin Film Mechanics
- Statistical Methods and Bayesian Inference
- Rheology and Fluid Dynamics Studies
- Molecular Junctions and Nanostructures
- Advanced biosensing and bioanalysis techniques
- Electrochemical Analysis and Applications
- Astronomical and nuclear sciences
- Strong Light-Matter Interactions
Chinese Academy of Sciences
2007-2024
Stony Brook University
2017-2024
University of South China
2019-2024
Central China Normal University
2024
Institute of Plasma Physics
2019-2023
University of Science and Technology of China
2012-2023
University of Bergen
2023
University of Koblenz and Landau
2023
University of Kaiserslautern
2023
European Organization for Nuclear Research
2023
Global polarization of $\Lambda$ hyperons has been measured to be the order a few tenths percent in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV, with no significant difference between and $\bar{\Lambda}$. These new results reveal collision energy dependence global together previously observed 7.7 -- 62.4 GeV indicate noticeable vorticity medium created non-central heavy-ion highest RHIC energy. The signal is rough quantitative agreement theoretical predictions from hydrodynamic model...
The Λ (Λ[over ¯]) hyperon polarization along the beam direction has been measured in Au+Au collisions at sqrt[s_{NN}]=200 GeV, for first time heavy-ion collisions. dependence on hyperons' emission angle relative to elliptic flow plane exhibits a second harmonic sine modulation, indicating quadrupole pattern of vorticity component direction, expected due flow. is found increase more peripheral collisions, and shows no strong transverse momentum (p_{T}) p_{T} greater than 1 GeV/c. magnitude...
We report the first measurement of elliptic anisotropy (v_{2}) charm meson D^{0} at midrapidity (|y|<1) in Au+Au collisions sqrt[s_{NN}]=200 GeV. The was conducted by STAR experiment RHIC utilizing a new high-resolution silicon tracker. measured v_{2} 0%-80% centrality can be described viscous hydrodynamic calculation for transverse momentum (p_{T}) less than 4 GeV/c. as function kinetic energy (m_{T}-m_{0}, where m_{T}=sqrt[p_{T}^{2}+m_{0}^{2}]) is consistent with that light mesons 10%-40%...
We trace the development of elliptic anisotropy (v2) via parton-parton collision history in two transport models. The parton v2 is studied as a function number collisions each Au+Au and d+Au at sNN =200 GeV. It found that majority comes from anisotropic escape probability partons, with no fundamental difference low high transverse momenta. contribution to hydrodynamic-type collective flow be small. Only when cross-section set unrealistically large does this start take over. Our findings...
We present measurements of π− and π+ elliptic flow, v2, at midrapidity in Au+Au collisions √sNN=200, 62.4, 39, 27, 19.6, 11.5, 7.7 GeV, as a function event-by-event charge asymmetry, Ach, based on data from the STAR experiment RHIC. find that (π+) flow linearly increases (decreases) with asymmetry for most centrality bins √sNN=27 GeV higher. At √sNN=200 slope difference v2 between Ach exhibits dependence, which is qualitatively similar to calculations incorporate chiral magnetic wave effect....
Collisions between prolate uranium nuclei are used to study how particle production and azimuthal anisotropies depend on initial geometry in heavy-ion collisions. We report the two- four-particle cumulants, $v_2\{2\}$ $v_2\{4\}$, for charged hadrons from U+U collisions at $\sqrt{s_{\rm NN}}$ = 193 GeV Au+Au 200 GeV. Nearly fully overlapping selected based amount of energy deposited by spectators STAR Zero Degree Calorimeters (ZDCs). Within this sample, observed dependence multiplicity...
The STAR Collaboration reports the measurement of semi-inclusive distributions charged-particle jets recoiling from a high transverse momentum hadron trigger, in central and peripheral $\mathrm{Au}+\mathrm{Au}$ collisions at $\sqrt{{s}_{\mathrm{NN}}}=200$ GeV. Charged are reconstructed with anti-${k}_{\mathrm{T}}$ algorithm for jet radii $R$ between 0.2 0.5 low infrared cutoff track constituents (${p}_{\mathrm{T}}>0.2 \mathrm{GeV}/\mathrm{c}$). A novel mixed-event technique is used to...
Dihadron angular correlations in d+Au collisions at sNN=200GeV are reported as a function of the measured zero-degree calorimeter neutral energy and forward charged hadron multiplicity Au-beam direction. A finite correlated yield is observed large relative pseudorapidity (Δη) on near side (i.e. azimuth Δϕ∼0). This Δη appears to scale with dominant, primarily jet-related, away-side (Δϕ∼π) yield. The Fourier coefficients Δϕ correlation, Vn=〈cosnΔϕ〉, have strong dependence. In addition, it...
We report first measurements of ${e}^{+}{e}^{\ensuremath{-}}$ pair production in the mass region $0.4<{M}_{ee}<2.6\text{ }\text{ }\mathrm{GeV}/{c}^{2}$ at low transverse momentum (${p}_{T}<0.15\text{ }\mathrm{GeV}/c$) noncentral $\mathrm{Au}+\mathrm{Au}$ collisions $\sqrt{{s}_{NN}}=200\text{ }\mathrm{GeV}$ and $\mathrm{U}+\mathrm{U}$ $\sqrt{{s}_{NN}}=193\text{ }\mathrm{GeV}$. Significant enhancement factors, expressed as ratios data over known hadronic contributions, are observed 40%--80%...
We present the measurement of transverse single-spin asymmetry weak boson production in transversely polarized proton-proton collisions at $\sqrt{s} = 500~\text{GeV}$ by STAR experiment RHIC. The measured observable is sensitive to Sivers function, one momentum dependent parton distribution functions, which predicted have opposite sign from that observed deep inelastic lepton-proton scattering. These data provide first experimental investigation non-universality fundamental our understanding QCD.
We report the energy dependence of mid-rapidity (anti-)deuteron production in Au+Au collisions at $\sqrt{{s}_{\text{NN}}}=7.7$, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV, measured by STAR experiment BNL Relativistic Heavy Ion Collider. The yield deuterons is found to be well described thermal model. collision energy, centrality, transverse momentum coalescence parameter ${B}_{2}$ are discussed. find that values for antideuterons systematically lower than those deuterons, indicating...
We report a new measurement of ${D}^{0}$-meson production at mid-rapidity $(|y|<1)$ in Au + collisions $\sqrt{{s}_{\mathrm{NN}}}=200\phantom{\rule{0.16em}{0ex}}\mathrm{GeV}$ utilizing the heavy flavor tracker, high resolution silicon detector STAR experiment. Invariant yields ${D}^{0}$ mesons with transverse momentum ${p}_{T}\ensuremath{\lesssim}9\phantom{\rule{0.16em}{0ex}}\mathrm{GeV}/c$ are reported various centrality bins (0--10%, 10--20%, 20--40%, 40--60%, and 60--80%). Blast-wave...
We report the first measurement of rapidity-odd directed flow ($v_{1}$) for $D^{0}$ and $\overline{D^{0}}$ mesons at mid-rapidity ($|y| < 0.8$) in Au+Au collisions $\sqrt{s_{\rm NN}}$ = 200\,GeV using STAR detector Relativistic Heavy Ion Collider. In 10--80\% collisions, slope $v_{1}$ rapidity dependence ($dv_{1}/dy$), averaged over mesons, is -0.080 $\pm$ 0.017 (stat.) 0.016 (syst.) transverse momentum $p_{\rm T}$ above 1.5~GeV/$c$. The absolute value $D^0$-meson $dv_1/dy$ about 25 times...
We report on measurements of dielectron $({e}^{+}{e}^{\ensuremath{-}})$ production in $\mathrm{Au}+\mathrm{Au}$ collisions at a center-of-mass energy 200 GeV per nucleon-nucleon pair using the STAR detector BNL Relativistic Heavy Ion Collider. Systematic yield as function transverse momentum $({p}_{\mathrm{T}})$ and collision centrality show an enhancement compared to cocktail simulation hadronic sources low invariant-mass region $({M}_{ee}<1\phantom{\rule{4pt}{0ex}}\text{GeV}/{c}^{2})$....
We present the first measurement of proton–Ω correlation function in heavy-ion collisions for central (0–40%) and peripheral (40–80%) Au + at sNN=200 GeV by STAR experiment Relativistic Heavy-Ion Collider (RHIC). Predictions ratio to are sensitive presence a nucleon–Ω bound state. These predictions based on interaction extracted from (2+1)-flavor lattice QCD calculations physical point. The measured between (small system) (large is less than unity relative momentum smaller 40 MeV/c....
We present measurements of second-order azimuthal anisotropy $({v}_{2})$ at midrapidity $(|y|<1.0)$ for light nuclei $d,\phantom{\rule{0.16em}{0ex}}t,\phantom{\rule{0.16em}{0ex}}^{3}\mathrm{He}$ (for $\sqrt{{s}_{NN}}=200$, 62.4, 39, 27, 19.6, 11.5, and 7.7 GeV) antinuclei $\overline{d}$ ($\sqrt{{s}_{NN}}=200$, 19.6 $^{3}\overline{\mathrm{He}}$ ($\sqrt{{s}_{NN}}=200$ in the STAR (Solenoidal Tracker RHIC) experiment. The ${v}_{2}$ these produced heavy-ion collisions is compared with those $p$...
Elliptic flow (v_2) values for identified particles at midrapidity in Au + collisions measured by the STAR experiment Beam Energy Scan Relativistic Heavy Ion Collider sqrt{s_{NN}}= 7.7--62.4 GeV are presented three centrality classes. The dependence and data 14.5 new. Except lowest beam energies we observe a similar relative v_2 baryon-meson splitting all classes which is agreement within 15% with number-of-constituent quark scaling. larger most to antiparticles, already observed minimum...
A precise measurement of the hypertriton lifetime is presented. In this letter, mesonic decay modes $\mathrm{{^3_\Lambda}H \rightarrow ^3He + \pi^-}$ and d p are used to reconstruct from Au+Au collision data collected by STAR collaboration at RHIC. minimum $\chi^2$ estimation determine $\tau = 142^{+24}_{-21}\,{\rm (stat.)} {\pm} 31\,{\rm (syst.)}$ ps. This about 50\% shorter than 263\pm2$ ps a free $\Lambda$, indicating strong hyperon-nucleon interaction in hypernucleus system. The...
We present high precision measurements of elliptic flow near midrapidity (|y|<1.0) for multistrange hadrons and ϕ meson as a function centrality transverse momentum in Au+Au collisions at center mass energy √[sNN]=200 GeV. observe that the dependence Ω v2 is similar to π p, respectively, which may indicate heavier strange quark flows strongly lighter up down quarks. This observation constitutes clear piece evidence development partonic collectivity heavy-ion top RHIC energy. Number...
We present results from a harmonic decomposition of two-particle azimuthal correlations measured with the STAR detector in Au+Au collisions for energies ranging $\sqrt{s_{NN}}=7.7$ GeV to 200 GeV. The third $v_3^2\{2\}=\langle \cos3(\phi_1-\phi_2)\rangle$, where $\phi_1-\phi_2$ is angular difference azimuth, studied as function pseudorapidity between particle pairs $\Delta\eta = \eta_1-\eta_2$. Non-zero {\vthree} directly related previously observed large-$\Delta\eta$ narrow-$\Delta\phi$...
The STAR Collaboration reports on the photoproduction of $\pi^+\pi^-$ pairs in gold-gold collisions at a center-of-mass energy 200 GeV/nucleon-pair. These pion are produced when nearly-real photon emitted by one ion scatters from other ion. We fit invariant mass spectrum with combination $\rho$ and $\omega$ resonances direct continuum. This is first observation ultra-peripheral collisions, measurement $\rho-\omega$ interference energies where dominated Pomeron exchange. amplitude consistent...
We report the direct virtual photon invariant yields in transverse momentum ranges 1<pT<3GeV/c and 5<pT<10GeV/c at mid-rapidity derived from dielectron mass continuum region 0.10<Mee<0.28GeV/c2 for 0–80% minimum-bias Au+Au collisions sNN=200GeV. A clear excess yield compared to nuclear overlap function TAA scaled p+p reference is observed pT range 1<pT<3GeV/c. For pT>6GeV/c production follows scaling. Model calculations with contributions thermal radiation initial hard parton scattering are...
We present measurements of $\mathrm{\ensuremath{\Omega}}$ and $\ensuremath{\phi}$ production at midrapidity from Au+Au collisions nucleon-nucleon center-of-mass energies $\sqrt{{s}_{NN}}=7.7, 11.5, 19.6$, 27, 39 GeV by the STAR experiment BNL Relativistic Heavy Ion Collider (RHIC). Motivated coalescence formation mechanism for these strange hadrons, we study ratios $N({\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}+{\overline{\mathrm{\ensuremath{\Omega}}}}^{+})/[2N(\ensuremath{\phi})]$....
The first (v_{1}^{fluc}), second (v_{2}), and third (v_{3}) harmonic coefficients of the azimuthal particle distribution at midrapidity are extracted for charged hadrons studied as a function transverse momentum (p_{T}) mean multiplicity density ⟨N_{ch}⟩ in U+U (sqrt[s_{NN}]=193 GeV), Au+Au, Cu+Au, Cu+Cu, d+Au, p+Au collisions sqrt[s_{NN}]=200 GeV with STAR detector. For same ⟨N_{ch}⟩, v_{1}^{fluc} v_{3} observed to be independent collision system, while v_{2} exhibits such scaling only when...