{
  "id": "1203.6711",
  "version": "v1",
  "published": "2012-03-30T04:26:09.000Z",
  "updated": "2012-03-30T04:26:09.000Z",
  "title": "Negative parity $Λ$ and $Σ$ resonances coupled to pseudoscalar and vector mesons",
  "authors": [
    "K. P. Khemchandani",
    "A. Martínez Torres",
    "H. Nagahiro",
    "A. Hosaka"
  ],
  "categories": [
    "nucl-th"
  ],
  "abstract": "An exploration of the dynamically generated $\\Lambda$ and $\\Sigma$ resonances has been made in the vector meson-baryon (VB) systems coupled to pseudoscalar meson-baryon (PB) channels. The VB interactions are obtained from the Lagrangians written within the hidden local symmetry which, in addition to Yukawa-type vector-baryon-baryon (VBB) vertices, naturally gives rise to a contact interaction. Using the VBB vertices, we calculate the $t$-, $s$- and $u$-channel diagrams considering the octet baryon exchange in the latter two cases. For the PB channels we rely on the the Weingberg-Tomozawa interactions and calculate the PB $\\leftrightarrow$ VB transition amplitudes extending the Kroll-Ruderman theorem by replacing the photon by the vector mesons. In addition to the low-lying $\\Lambda(1405)$, $\\Lambda(1670)$ found in previous works, we find resonances which coincide well with: $\\Lambda(2000)$, $\\Sigma(1750) S_{11}$, $\\Sigma(1940) D_{13}$, $\\Sigma(2000) S_{11}$ and predict three $\\Lambda^*$'s with $J^\\pi = 3/2^-$ and masses: $1754 - i2$ MeV, $1862 - i33$ MeV, $2139 - i14$ MeV together with a broad $1/2^-$ $\\Sigma^*$ with mass $\\sim$ 1430 MeV. We find that most of these next-to-low-lying states couple weakly with the pseudoscalar mesons, which implies that it is important to study the reactions with VB final states in order to obtain a reliable information on the properties of such resonances.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-03-30T04:26:09.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "12.40.Vv",
      "13.75.-n",
      "14.20.Jn"
    ],
    "keywords": [
      "vector mesons",
      "negative parity",
      "pseudoscalar",
      "resonances",
      "hidden local symmetry"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevD.85.114020",
      "journal": "Physical Review D",
      "year": 2012,
      "month": "Jun",
      "volume": 85,
      "number": 11,
      "pages": 114020
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1095528,
      "adsabs": "2012PhRvD..85k4020K"
    }
  }
}