NUCLEAR TECHNIQUES, Volume. 46, Issue 4, 040013(2023)

Transport model study of conserved charge fluctuations and QCD phase transition in heavy-ion collisions

Qian CHEN1,2,3,4, Guoliang MA1,2,3,4、*, and Jinhui CHEN1,2、**
Author Affiliations
  • 1Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Institute of Modern Physics, Fudan University, Shanghai 200433, China
  • 2Shanghai Research Center for Theoretical Nuclear Physics, NSFC and Fudan University, Shanghai 200438, China
  • 3Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • 4University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(26)
    QCD phase diagram[56]
    AMPT results on the density distributions of Q+ (red) and Q- (blue) at different evolution stages for a selected central Au+Au collision event at sNN=7.7 GeV
    AMPT results on the density distributions of baryon (red) and anti-baryon (blue) at different evolution stages for a selected central Au+Au collision event at sNN=7.7 GeV
    AMPT results on the density distributions of s (red) ands¯ (blue) constitutive quarks at different evolution stages for a selected central Au+Au collision event atsNN=7.7 GeV
    Beam-energy dependence of moment products in most central (0%~5%) and peripheral (70%~80%) bins of Au+Au collisions, in comparison with STAR measurements[59]
    Q-vs. Q+ at different evolution stages of Au+Au collisions (minus bias) at sNN=7.7 GeV and 200 GeV
    Centrality dependence of moment product σ2/M at different evolution stages of Au+Au collisions atsNN=7.7 GeV and 200 GeV, in comparison with STAR measurements[59]
    AMPT results on cumulants Cn of proton, antiproton, and net-proton distributions as a function ofNpart in Au+Au collisions atsNN=7.7 GeV, in comparison with STAR measurements[26]
    AMPT results on cumulant ratios of proton, antiproton, and net-proton distributions as a function of Npart in Au+Au collisions atsNN=7.7 GeV, in comparison with STAR measurements[26]
    AMPT results on normalized correlation functions of proton and antiproton distributions as a function of Npart in Au+Au collisions atsNN=7.7 GeV, in comparison with STAR measurements[26]
    AMPT results on cumulants ratios of proton, antiproton, and net-proton distributions as a function of rapidity cut, ymax in 0%~5% of central Au+Au collisions at sNN=7.7 GeV, in comparison with STAR measurements[26]
    AMPT results on normalized correlation functions of proton and antiproton distributions as a function of rapidity cut, ymax in 0%~5% of central Au + Au collisions at sNN=7.7 GeV, in comparison with STAR measurements[26]
    AMPT results on cumulant ratios of baryon distributions as a function of Npart at different evolution stages in
    AMPT results on correlation functions of baryons as a function of Npart at different evolution stages in
    AMPT results on the acceptance factor as a function of Npart in Au+Au collisions atsNN=7.7 GeV
    AMPT results on cumulants Cn of net-kaon multiplicity distributions as a function ofNpart in Au+Au collisions atsNN=7.7 GeV, in comparison with STAR measurements[129]
    AMPT results on cumulant ratio of net-kaon multiplicity distributions as a function of Npart in Au+Au collisions atsNN=7.7 GeV, in comparison with STAR measurements[129]
    AMPT results on correlation functions of K+ andK- as a function ofNpart in Au+Au collisions
    AMPT results on cumulants Cn of net-strangeness or net-kaon multiplicity distributions as a function ofNpart at different evolution stages in Au+Au collisions atsNN=7.7 GeV, in comparison with STAR measurements
    AMPT results on n-particle correlation functions of κni,j s (constitutive) quarks ands¯ (constitutive) quarks as a function ofNpart at different evolution stages in Au+Au collisions atsNN=7.7 GeV
    Coordinate distribution of hadrons in the transverse plane after introducing parton density fluctuation
    Energy dependence of high-moment ratios of proton, net-proton, net-nucleon and net-baryon in central Au+Au collisions at sNN=7.7 GeV, 11.5 GeV and 19.6 GeV from the original AMPT and ELDF AMPT models
    Energy dependence of high-moment ratios of proton, net-proton, net-nucleon, and net-baryon in central Au+Au collisions at sNN=7.7 GeV, 11.5 GeV and 19.6 GeV from the original AMPT (with hadronic cascade stage turning off) and ELDF AMPT models
    Collision energy sNN dependence of the ratioΟK-Ξ-ϕ-Λ in central Pb+Pb collisions at SPS energies and in central Au+Au collisions at RHIC energies
    • Table 1. Five evolution stages in the AMPT model with a string melting mechanism

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      Table 1. Five evolution stages in the AMPT model with a string melting mechanism

      演化阶段Stage定义Description
      (a) 初态 Initial state由A+A碰撞产生的夸克和反夸克组成的初始状态的部分子物质The initial state of partonic matter consisting of quarks and antiquarks created by A+A collisions
      (b) 部分子级联 After parton cascade由经历了部分子级联的夸克和反夸克组成的最终状态的部分子物质The final state of partonic matter consisting of quarks and antiquarks that have undergone parton cascade
      (c) 强子化 After hadronization由冻出后的部分子物质通过组合强子化模型转变来的初始状态的强子物质The initial state of hadronic matter transformed from the freeze-out partonic matter through the hadronization of coalescence
      (d) 强子再散射 After hadronic rescatterings经历了强子再散射阶段后冻出的强子物质The freeze-out hadronic matter which has undergone hadronic rescatterings
      (e) 末态 Final state考虑了弱衰变的最终状态的强子物质The final state of hadronic matter with considering weak decays
    • Table 2. Yields of strange hadron in full rapidity space from central (0%~7.2% centrality) Pb+Pb collisions at SPS energies measured by the NA49 Collaboration[149]

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      Table 2. Yields of strange hadron in full rapidity space from central (0%~7.2% centrality) Pb+Pb collisions at SPS energies measured by the NA49 Collaboration[149]

      EsNNΞ-K+ΛϕΟK-Ξ-ϕ-ΛTcΔs
      206.31.50±0.1340.7±0.727.1±0.21.89±0.311.19±0.22131.30.08±0.20
      307.62.42±0.1952.9±0.936.9±0.31.84±0.221.88±0.27140.10.71±0.25
      408.82.96±0.2059.1±1.943.1±0.42.55±0.171.59±0.16146.10.44±0.15
      8012.33.80±0.2676.9±2.050.1±0.64.04±0.191.44±0.13153.50.31±0.12
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    Qian CHEN, Guoliang MA, Jinhui CHEN. Transport model study of conserved charge fluctuations and QCD phase transition in heavy-ion collisions[J]. NUCLEAR TECHNIQUES, 2023, 46(4): 040013

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    Paper Information

    Category: Research Articles

    Received: Feb. 14, 2023

    Accepted: --

    Published Online: Apr. 27, 2023

    The Author Email:

    DOI:10.11889/j.0253-3219.2023.hjs.46.040013

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