{
  "id": "0911.4013",
  "version": "v1",
  "published": "2009-11-20T11:08:55.000Z",
  "updated": "2009-11-20T11:08:55.000Z",
  "title": "Structure of A=7 iso-triplet $Λ$ hypernuclei studied with he four-body model",
  "authors": [
    "E. Hiyama",
    "Y. Yamamoto",
    "T. Motoba",
    "M. Kamimura"
  ],
  "comment": "12 pages, 9 figures, To be published in Phys. Rev. C",
  "journal": "Phys.Rev.C80:054321,2009",
  "doi": "10.1103/PhysRevC.80.054321",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The structure of the T=1 iso-triplet hypernuclei, $^7_{\\Lambda}$He, $^7_{\\Lambda}$Li and $^7_{\\Lambda}$Be within the framework of an $\\alpha +\\Lambda +N+N$ four-body cluster model is studied. Interactions between the constituent subunits are determined so as to reproduce reasonably well the observed low-energy properties of the $\\alpha N$, $\\alpha \\Lambda$, $\\alpha NN$ and $\\alpha \\Lambda N$ subsystems. Furthermore, the two-body $\\Lambda N$ interaction is adjusted so as to reproduce the $0^+$-$1^+$ splitting of $^4_{\\Lambda}$H. Also a phenomenological $\\Lambda N$ charge symmetry breaking(CSB) interaction is introduced. The $\\Lambda$ binding energy of the ground state in $^7_{\\Lambda}$He is predicted to be 5.16(5.36) MeV with(without) the CSB interaction. The calculated energy splittings of the $3/2^+$-$5/2^+$ states in $^7_{\\Lambda}$He and $^7_{\\Lambda}$Li are around 0.1 MeV. We point out that there is a three-layer structure of the matter distribution, $\\alpha$ particle, $\\Lambda$ skin, proton or neutron halo, in the $^7_{\\Lambda}{\\rm He}(J=5/2^+)$, $^7_{\\Lambda}{\\rm Li}(J=5/2^+)$ and $^7_{\\Lambda}{\\rm Be}(J=1/2^+)$ states.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-11-20T11:08:55.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "21.10.Dr",
      "21.80.+a",
      "21.60.Gx",
      "21.45.-v"
    ],
    "keywords": [
      "four-body model",
      "four-body cluster model",
      "constituent subunits",
      "low-energy properties",
      "charge symmetry"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review C",
      "year": 2009,
      "month": "Nov",
      "volume": 80,
      "number": 5,
      "pages": "054321"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 837444,
      "adsabs": "2009PhRvC..80e4321H"
    }
  }
}