{
  "id": "1712.05569",
  "version": "v1",
  "published": "2017-12-15T07:44:15.000Z",
  "updated": "2017-12-15T07:44:15.000Z",
  "title": "Massive neutron stars and $Λ$-hypernuclei in relativistic mean field models",
  "authors": [
    "Ting-Ting Sun",
    "Cheng-Jun Xia",
    "Shi-Sheng Zhang",
    "M. S. Smith"
  ],
  "comment": "5 figures, 1 table, to be published in Chinese Physics C",
  "categories": [
    "nucl-th"
  ],
  "abstract": "Based on relativistic mean field (RMF) models, we study finite $\\Lambda$-hypernuclei and massive neutron stars. The effective $N$-$N$ interactions PK1 and TM1 are adopted, while the $N$-$\\Lambda$ interactions are constrained by reproducing the binding energy of $\\Lambda$-hyperon at $1s$ orbit of $^{40}_{\\Lambda}$Ca. It is found that the $\\Lambda$-meson couplings follow a simple relation, indicating a fixed $\\Lambda$ potential well for symmetric nuclear matter at saturation densities, i.e., around $V_{\\Lambda} = -29.786$ MeV. With those interactions, a large mass range of $\\Lambda$-hypernuclei can be well described. Furthermore, the masses of PSR J1614-2230 and PSR J0348+0432 can be attained adopting the $\\Lambda$-meson couplings $g_{\\sigma\\Lambda}/g_{\\sigma N}\\gtrsim 0.73$, $g_{\\omega\\Lambda}/g_{\\omega N}\\gtrsim 0.80$ for PK1 and $g_{\\sigma\\Lambda}/g_{\\sigma N}\\gtrsim 0.81$, $g_{\\omega\\Lambda}/g_{\\omega N}\\gtrsim 0.90$ for TM1, respectively. This resolves the Hyperon Puzzle without introducing any additional degrees of freedom.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2017-12-15T07:44:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "relativistic mean field models",
      "massive neutron stars",
      "hypernuclei",
      "meson couplings",
      "large mass range"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}