{
  "id": "0808.0628",
  "version": "v1",
  "published": "2008-08-05T12:13:01.000Z",
  "updated": "2008-08-05T12:13:01.000Z",
  "title": "P-wave Lambda N - Sigma N coupling and the spin-orbit splitting of 9 Lambda Be",
  "authors": [
    "Y. Fujiwara",
    "M. Kohno",
    "Y. Suzuki"
  ],
  "comment": "5 pages, no figures",
  "journal": "Mod.Phys.Lett.A24:1031-1034,2009",
  "doi": "10.1142/S0217732309000528",
  "categories": [
    "nucl-th"
  ],
  "abstract": "We reexamine the spin-orbit splitting of 9 Lambda Be excited states in terms of the SU_6 quark-model baryon-baryon interaction. The previous folding procedure to generate the Lambda alpha spin-orbit potential from the quark-model Lambda N LS interaction kernel predicted three to five times larger values for Delta E_{ell s}=E_x(3/2^+)-E_x(5/2^+) in the model FSS and fss2. This time, we calculate Lambda alpha LS Born kernel, starting from the LS components of the nuclear-matter G-matrix for the Lambda hyperon. This framework makes it possible to take full account of an important P-wave Lambda N - Sigma N coupling through the antisymmetric LS^{(-)} force involved in the Fermi-Breit interaction. We find that the experimental value, Delta E^{exp}_{ell s}=43 pm 5 keV, is reproduced by the quark-model G-matrix LS interaction with a Fermi-momentum around k_F=1.0 fm^{-1}, when the model FSS is used in the energy-independent renormalized RGM formalism.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-08-05T12:13:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "21.80.+a",
      "13.75.Ev",
      "12.39.Jh",
      "21.45.-v"
    ],
    "keywords": [
      "spin-orbit splitting",
      "lambda alpha ls born kernel",
      "lambda alpha spin-orbit potential",
      "quark-model g-matrix ls interaction",
      "model fss"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "Modern Physics Letters A",
      "year": 2009,
      "volume": 24,
      "number": "11-13",
      "pages": 1031
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 792353,
      "adsabs": "2009MPLA...24.1031F"
    }
  }
}