{
  "id": "2102.05267",
  "version": "v1",
  "published": "2021-02-10T05:18:27.000Z",
  "updated": "2021-02-10T05:18:27.000Z",
  "title": "Constraints on the Symmetry Energy from PREX-II in the Multimessenger Era",
  "authors": [
    "Tong-Gang Yue",
    "Lie-Wen Chen",
    "Zhen Zhang",
    "Ying Zhou"
  ],
  "comment": "5 pages, 4 figures",
  "categories": [
    "nucl-th",
    "astro-ph.HE",
    "hep-ph",
    "nucl-ex"
  ],
  "abstract": "The neutron skin thickness $\\Delta r_{\\rm{np}}$ of heavy nuclei is essentially determined by the symmetry energy density slope $L({\\rho })$ at $\\rho_c = 0.11/0.16\\rho_0$ ($\\rho_0$ is nuclear saturation density), roughly corresponding to the average density of finite nuclei. The PREX collaboration recently reported a model-independent extraction of $\\Delta r^{208}_{\\rm{np}} = 0.29 \\pm 0.07$ fm for the $\\Delta r_{\\rm{np}}$ of $^{208}$Pb, which suggests a rather stiff symmetry energy $E_{\\rm{sym}}({\\rho })$ with $L({\\rho_c }) \\ge 55$ MeV. We demonstrate that the $E_{\\rm{sym}}({\\rho })$ cannot be too stiff and $L({\\rho_c }) \\le 73$ MeV is necessary to be compatible with (1) the ground-state properties and giant monopole resonances of finite nuclei, (2) the constraints on the equation of state of symmetric nuclear matter at suprasaturation densities from flow data in heavy-ion collisions, (3) the largest neutron star (NS) mass reported so far for PSR J0740+6620, (4) the NS tidal deformability extracted from gravitational wave signal GW170817 and (5) the mass-radius of PSR J0030+045 measured simultaneously by NICER. This allow us to obtain $55 \\le L({\\rho_c }) \\le 73$ MeV and $0.22 \\le \\Delta r^{208}_{\\rm{np}} \\le 0.27$ fm, and further $E_{\\rm{sym}}({\\rho_0 }) = 34.5 \\pm 1.5$ MeV, $L({\\rho_0 }) = 85.5 \\pm 22.2$ MeV, and $E_{\\rm{sym}}({2\\rho_0 }) = 63.9 \\pm 14.8$ MeV. A number of critical implications on nuclear physics and astrophysics are discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-02-10T05:18:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "multimessenger era",
      "constraints",
      "finite nuclei",
      "gravitational wave signal gw170817",
      "symmetry energy density slope"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}