{
  "annotation_id": "e8d846c1-86f9-49bb-8bcf-209917b657a9",
  "date_created": "2026-03-02T18:00:22.248000Z",
  "date_modified": "2026-03-02T18:00:22.248000Z",
  "file_hash": "4d99d63442d6151eb339113601d56e69d8aee45229e7679ad6cc86198a09527e",
  "private": false,
  "record": {
    "abstract": "Properties of dense nucleon matter and the structure of neutron stars are\nstudied using variational chain summation methods and the new Argonne v18\ntwo-nucleon interaction. The neutron star gravitational mass limit obtained\nwith this interaction is 1.67 M_{solar}. Boost corrections to the two-nucleon\ninteraction, which give the leading relativistic effect of order (v/c)^2, as\nwell as three-nucleon interactions, are also included in the nuclear\nHamiltonian. Their successive addition increases the mass limit to 1.80 and\n2.20 M_{solar}. Hamiltonians including a three-nucleon interaction predict a\ntransition in neutron star matter to a phase with neutral pion condensation at\na baryon number density of 0.2 fm^{-3}. We also investigate the possibility of\ndense nucleon matter having an admixture of quark matter, described using the\nbag model equation of state. Neutron stars of 1.4 M_{solar} do not appear to\nhave quark matter admixtures in their cores. However, the heaviest stars are\npredicted to have cores consisting of a quark and nucleon matter mixture. These\nadmixtures reduce the maximum mass of neutron stars from 2.20 to 2.02 (1.91)\nM_{solar} for bag constant B = 200 (122) MeV/fm^3. Stars with pure quark matter\nin their cores are found to be unstable. We also consider the possibility that\nmatter is maximally incompressible above an assumed density, and show that\nrealistic models of nuclear forces limit the maximum mass of neutron stars to\nbe below 2.5 M_{solar}. The effects of the phase transitions on the composition\nof neutron star matter and its adiabatic index are discussed.",
    "arxiv_id": "nucl-th/9804027",
    "authors": [
      "A. Akmal",
      "V. R. Pandharipande",
      "D. G. Ravenhall"
    ],
    "categories": [
      "nucl-th",
      "astro-ph"
    ],
    "doi": "10.1103/PhysRevC.58.1804",
    "journal_ref": "Phys.Rev.C58:1804-1828,1998",
    "title": "The equation of state for nucleon matter and neutron star structure",
    "url": "https://arxiv.org/abs/nucl-th/9804027"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "be2cbe1f-f067-4b06-8a4a-272590bc51c4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}