{
  "id": "2106.08491",
  "version": "v1",
  "published": "2021-06-16T00:14:21.000Z",
  "updated": "2021-06-16T00:14:21.000Z",
  "title": "Langevin dynamics of heavy quarks in a soft-hard factorized approach",
  "authors": [
    "Shuang Li",
    "Fei Sun",
    "Wei Xie",
    "Wei Xiong"
  ],
  "comment": "13 pages, 10 figures",
  "categories": [
    "hep-ph",
    "nucl-th"
  ],
  "abstract": "By utilizing a soft-hard factorized model, which combines a thermal perturbative description of soft scatterings and a perturbative QCD-based calculation for hard collisions, we study the energy and temperature dependence of the heavy quark diffusion coefficients in Langevin dynamics. The adjustable parameters are fixed from the comprehensive model-data comparison. We find that a small value of the spatial diffusion coefficient at transition temperature is preferred by data $2\\pi TD_{s}(T_{c}) \\simeq 6$. With the parameter-optimized model, we are able to describe simultaneously the prompt $D^{0}$ $R_{\\rm AA}$ and $v_{2}$ data at $p_{\\rm T}\\le8$ GeV in Pb--Pb collisions at $\\sqrt{s_{\\rm NN}}=2.76$ and $\\sqrt{s_{\\rm NN}}=5.02$ TeV. We also make predictions for non-prompt $D^{0}$ meson for future experimental tests down to the low momentum region.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-06-16T00:14:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "soft-hard factorized approach",
      "langevin dynamics",
      "heavy quark diffusion coefficients",
      "spatial diffusion coefficient",
      "low momentum region"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}