{
  "id": "hep-ph/0606273",
  "version": "v4",
  "published": "2006-06-27T09:05:41.000Z",
  "updated": "2006-10-17T21:55:09.000Z",
  "title": "Isospin and a possible interpretation of the newly observed X(1576)",
  "authors": [
    "Feng-Kun Guo",
    "Peng-Nian Shen"
  ],
  "comment": "5 pages, ReVTeX4, 3 figures. Version accepted for publication as a brief report in Phys. Rev. D",
  "journal": "Phys.Rev.D74:097503,2006",
  "doi": "10.1103/PhysRevD.74.097503",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "Recently, the BES collaboration observed a broad resonant structure X(1576) with a large width being around 800 MeV and assigned its $J^{PC}$ number to $1^{--}$. We show that the isospin of this resonant structure should be assigned to 1. This state might be a molecule state or a tetraquark state. We study the consequences of a possible $K^*(892)$-${\\bar \\kappa}$ molecular interpretation. In this scenario, the broad width can easily be understood. By using the data of $B(J/\\psi\\to X\\pi^0)\\cdot B(X\\to K^+K^-)$, the branching ratios $B(J/\\psi\\to X\\pi^0)\\cdot B(X\\to \\pi^+\\pi^-)$ and $B(J/\\psi\\to X\\pi^0)\\cdot B(X\\to K^+K^-\\pi^+\\pi^-)$ are further estimated in this molecular state scenario. It is shown that the $X\\to \\pi^+\\pi^-$ decay mode should have a much larger branching ratio than the $X\\to K^+K^-$ decay mode has. As a consequence, this resonant structure should also be seen in the $J/\\psi\\to \\pi^+\\pi^-\\pi^0$ and $J/\\psi\\to K^+K^-\\pi^+\\pi^-\\pi^0$ processes, especially in the former process. Carefully searching this resonant structure in the $J/\\psi\\to \\pi^+\\pi^-\\pi^0$ and $J/\\psi\\to K^+K^-\\pi^+\\pi^-\\pi^0$ decays should be important for understanding the structure of X(1567).",
  "revisions": [
    {
      "version": "v4",
      "updated": "2006-10-17T21:55:09.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.25.-k",
      "12.39.Mk"
    ],
    "keywords": [
      "decay mode",
      "broad resonant structure",
      "molecular state scenario",
      "bes collaboration",
      "large width"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 720154
    }
  }
}