{
  "id": "2412.12729",
  "version": "v1",
  "published": "2024-12-17T09:51:27.000Z",
  "updated": "2024-12-17T09:51:27.000Z",
  "title": "Neutron Star Properties and Femtoscopic Constraints",
  "authors": [
    "I. Vidana",
    "V. Mantovani Sarti",
    "J. Haidenbauer",
    "D. L. Mihaylov",
    "L. Fabbietti"
  ],
  "comment": "9 pages, 3 figures, 1 table",
  "categories": [
    "nucl-th",
    "astro-ph.HE",
    "astro-ph.SR",
    "hep-ph"
  ],
  "abstract": "We construct the equation of state of hypernuclear matter and study the structure of neutron stars employing a chiral hyperon-nucleon interaction of the J\\\"{u}lich--Bonn group tuned to femtoscopic $\\Lambda p$ data of the ALICE collaboration, and $\\Lambda\\Lambda$ and $\\Xi$N interactions determined from Lattice QCD calculations by the HAL QCD collaboration that reproduce the femtoscopic $\\Lambda\\Lambda$ and $\\Xi^-p$ data. We employ the ab-initio microscopic Brueckner--Hartree--Fock theory extended to the strange baryon sector. A special focus is put on the uncertainties of the hyperon interactions and how they are effectively propagated to the composition, equation of state, and mass-radius relation of neutron stars. To such end, we consider the uncertainty due to the experimental error of the femtoscopic $\\Lambda p$ data used to fix the chiral hyperon-nucleon interaction and the theoretical uncertainty, estimated from the residual cut-off dependence of this interaction. We find that the final maximum mass of a neutron star with hyperons is in the range $1.3-1.4$ $M_\\odot$, in agreement with previous works. The hyperon puzzle, therefore, remains still an open issue if only two-body hyperon-nucleon and hyperon-hyperon interactions are considered.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-12-17T09:51:27.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "neutron star properties",
      "femtoscopic constraints",
      "chiral hyperon-nucleon interaction",
      "ab-initio microscopic brueckner-hartree-fock theory",
      "final maximum mass"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}