{
  "id": "1403.0167",
  "version": "v1",
  "published": "2014-03-02T06:16:40.000Z",
  "updated": "2014-03-02T06:16:40.000Z",
  "title": "Observation of the $X(1840)$ at BESIII",
  "authors": [
    "Jingqing Zhang",
    "for the BESIII Collaboration"
  ],
  "comment": "4 pages, 3 figures, proceeding of PIC2013",
  "categories": [
    "hep-ex"
  ],
  "abstract": "Observation of the $X(1840)$ in the $3(\\pi^+\\pi^-)$ invariant mass in $J/\\psi\\rightarrow\\gamma 3(\\pi^+\\pi^-)$ at BESIII is reviewed. With a sample of $225.3\\times10^6$ $J/\\psi$ events collected with the BESIII detector at BEPCII, the $X(1840)$ is observed with a statistical significance of $7.6\\sigma$. The mass, width and product branching fraction of the $X(1840)$ are determined. The decay $\\eta^\\prime\\rightarrow 3(\\pi^+\\pi^-)$ is searched for, and the upper limit of the branching fraction is set at the 90% confidence level.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2014-03-02T06:16:40.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.20.Gd",
      "12.39.Mk"
    ],
    "keywords": [
      "observation",
      "invariant mass",
      "besiii detector",
      "product branching fraction",
      "upper limit"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1142/S2010194514603111",
      "journal": "International Journal of Modern Physics Conference Series",
      "year": 2014,
      "month": "May",
      "volume": 31,
      "pages": 1460311
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1283332,
      "adsabs": "2014IJMPS..3160311Z"
    }
  }
}