{
  "id": "hep-ph/0401192",
  "version": "v2",
  "published": "2004-01-24T13:41:07.000Z",
  "updated": "2004-01-30T17:14:46.000Z",
  "title": "Pentaquark Symmetries, Selection Rules and another potentially Narrow State",
  "authors": [
    "F. E. Close",
    "J. J. Dudek"
  ],
  "comment": "Revised version, corrects PDF margin problems, minor changes to text",
  "journal": "Phys.Lett. B586 (2004) 75-82",
  "doi": "10.1016/j.physletb.2004.02.023",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We identify essential differences between the pentaquark and chiral soliton models of \\10bar$_5$ and {\\bf 8}$_5$ pentaquarks and conventional {\\bf 8}$_3$ states, which are experimentally measurable. We show how the decays of $\\Xi_5$ states in particular can test models of the pentaquarks, recommend study of the relative branching ratios of e.g. $\\Xi^{-}_5 \\to \\Xi^-\\pi^0:\\Xi^0\\pi^-$, and predict that the decay amplitude $\\Xi_5 \\to \\Xi^*\\pi$ is zero at leading order in pentaquark models for any mixture of \\10bar and the associated {\\bf 8}$_5$. We also include a pedagogic discussion of wavefunctions in the pentaquark picture and show that pentaquark models have this {\\bf 8}$_5$ with $F/D=1/3$, in leading order forbidding $\\Xi_5 \\to \\Lambda K$. The role of Fermi-Dirac symmetry in the $qqqq$ wavefunction and its implications for the width of pentaquarks are briefly discussed. The relative couplings $g^2(\\Theta_Q N K_Q^*)/g^2(\\Theta_Q N K_Q) = 3$ for $Q \\equiv s,c,b$. A further potentially narrow state $\\Lambda$ in {\\bf 8}$_5$ with $J^P = 3/2^+$ is predicted around 1650 MeV.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2004-01-30T17:14:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "potentially narrow state",
      "selection rules",
      "pentaquark symmetries",
      "pentaquark models",
      "chiral soliton models"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 643318
    }
  }
}