A5067089473- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Particle physics theoretical and experimental studies
- Pulsars and Gravitational Waves Research
Shandong University
2021-2024
Institute of Modern Physics
2023-2024
Chinese Academy of Sciences
2023-2024
University of Chinese Academy of Sciences
2023-2024
University of Science and Technology of China
2019-2023
Brookhaven National Laboratory
2022
Abilene Christian University
2019
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...
Global hyperon polarization, $\overline{P}_\mathrm{H}$, in Au+Au collisions over a large range of collision energy, $\sqrt{s_\mathrm{NN}}$, was recently measured and successfully reproduced by hydrodynamic transport models with intense fluid vorticity the quark-gluon plasma. While na\"{i}ve extrapolation data trends suggests $\overline{P}_\mathrm{H}$ as energy is reduced, behavior at small $\sqrt{s_\mathrm{NN}}<7.7$ GeV unknown. Operating STAR experiment fixed-target mode, we polarization...
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...
Quark interactions with topological gluon configurations can induce chirality imbalance and local parity violation in quantum chromodynamics. This lead to electric charge separation along the strong magnetic field relativistic heavy-ion collisions -- chiral effect (CME). We report measurements by STAR collaboration of a CME-sensitive observable $p$+Au $d$+Au at 200 GeV, where CME is not expected, using charge-dependent pair correlations relative third particle. observe similar those measured...
Understanding gluon density distributions and how they are modified in nuclei among the most important goals nuclear physics. In recent years, diffractive vector meson production measured ultraperipheral collisions (UPCs) at heavy-ion colliders has provided a new tool for probing density. this Letter, we report first measurement of J/ψ photoproduction off deuteron UPCs center-of-mass energy sqrt[s_{NN}]=200 GeV d+Au collisions. The differential cross section as function momentum transfer -t...
Analytical expressions for the Transverse Momentum Dependent (TMD, or unintegrated) gluon and sea quark densities in nuclei are derived at leading order of QCD running coupling. The calculations performed framework rescaling model Kimber-Martin-Ryskin (KMR) prescription, where Bessel-inspired behavior parton small Bjorken x values, obtained case flat initial conditions double scaling approximation, is applied. used to evaluate inclusive heavy flavor production proton-lead collisions LHC. We...
We present high-precision measurements of elliptic, triangular, and quadrangular flow ${v}_{2}$, ${v}_{3}$, ${v}_{4}$, respectively, at midrapidity for identified hadrons $\ensuremath{\pi}$, $p$, $K$, $\ensuremath{\varphi}$, ${K}_{s}$, $\mathrm{\ensuremath{\Lambda}}$ as a function centrality transverse momentum in Au+Au collisions the center-of-mass energy $\sqrt{{s}_{NN}}=200$ GeV. observe similar ${v}_{n}$ trends between light strange mesons which indicates that heavier quarks strongly...
The STAR Collaboration reports measurements of back-to-back azimuthal correlations di-${\ensuremath{\pi}}^{0}$s produced at forward pseudorapidities ($2.6<\ensuremath{\eta}<4.0$) in $p+p$, $p+\mathrm{Al}$, and $p+\mathrm{Au}$ collisions a center-of-mass energy 200 GeV. We observe clear suppression the correlated yields ${\ensuremath{\pi}}^{0}$ pairs $p+\mathrm{Al}$ compared to $p+p$ data. observed as function transverse momentum suggests nonlinear gluon dynamics arising high parton...
The STAR Collaboration reports a measurement of the transverse single-spin asymmetries, $A_{N}$, for neutral pions produced in polarized proton collisions with protons ($pp$), aluminum nuclei ($p\rm{Al}$) and gold ($p\rm{Au}$) at nucleon-nucleon center-of-mass energy 200 GeV. Neutral are observed forward direction relative to transversely beam, pseudo-rapidity region $2.7<\eta<3.8$. Results presented $\pi^0$s FMS electromagnetic calorimeter narrow Feynman x ($x_F$) momentum ($p_T$) bins,...
Quantum fluctuations plays an essential role in forming the collective flow of hadrons observed relativistic heavy-ion collisions. Event-by-event can arise from various sources, such as initial geometry, hydrodynamic expansion, hadronization, and hadronic evolution nuclear matter, while exact contribution each source is still open question. Using a ($3+\mathrm{1}$)-dimensional model coupled to Monte Carlo Glauber condition, Cooper-Frye particlization transport model, we explore system-size...
Abstract Inclusive P -wave charmonia production in hadronic collisions at high energies is discussed the framework of non-relativistic QCD and $$k_T$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>k</mml:mi> <mml:mi>T</mml:mi> </mml:msub> </mml:math> -factorization formalism. We present two consistent approaches to merge usual leading order calculations with tree-level next-to-leading off-shell amplitudes. Using these prescriptions, we extracted long-distance...
The low- $$x$$ behavior of the linearly polarized gluon density $${{h}_{g}}(x,k_{t}^{2},{{Q}^{2}})$$ in nuclei is studied rescaling model at small transverse momentum $${{k}_{t}}$$ .