{
  "id": "1506.04960",
  "version": "v1",
  "published": "2015-06-16T13:18:48.000Z",
  "updated": "2015-06-16T13:18:48.000Z",
  "title": "Search for $ψ(4S)\\toηJ/ψ$ in $B^\\pm \\ra ηJ/ψK^\\pm$ and $e^+ e^- \\to ηJ/ψ$ processes",
  "authors": [
    "Gao Xu-yang",
    "Wang Xiao-long",
    "Shen Cheng-ping"
  ],
  "comment": "4 pages, 2 figures",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We search for the $\\psi(4S)$ state in $B^\\pm \\ra \\eta J/\\psi K^\\pm$ and $e^+e^- \\ra \\eta J/\\psi$ based on the Belle measurements with the assumed mass $M=(4230\\pm8)$ MeV/$c^2$ and width $\\Gamma=(38\\pm12)$ MeV. No significant signal is observed in the $\\eta J/\\psi$ mass spectra. The 90\\% confidence level upper limit on the product branching fraction $\\BR(B^\\pm \\ra \\psi(4S)K^\\pm)\\BR(\\psi(4S) \\ra \\eta J/\\psi)<6.8\\times 10^{-6}$ is obtained in $B^\\pm \\ra \\eta J/\\psi K^\\pm$ decays. By assuming the partial width of $\\psi(4S) \\to e^+e^-$ being 0.63 keV, the branching fraction limit $\\BR(\\psi(4S) \\ra \\eta J/\\psi) < 1.3\\%$ is obtained at the 90\\% confidence level in $e^+e^- \\ra \\eta J/\\psi$, which is consistent with the theoretical prediction.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-06-16T13:18:48.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.40.Pq",
      "13.66.Bc"
    ],
    "keywords": [
      "confidence level upper limit",
      "product branching fraction",
      "significant signal",
      "mass spectra",
      "branching fraction limit"
    ],
    "publication": {
      "doi": "10.1088/1674-1137/40/1/013001",
      "journal": "Chinese Physics C",
      "year": 2016,
      "month": "Jan",
      "volume": 40,
      "number": 1,
      "pages": "013001"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2016ChPhC..40a3001X",
      "inspire": 1376284
    }
  }
}