{
  "id": "1806.05113",
  "version": "v1",
  "published": "2018-06-13T15:38:00.000Z",
  "updated": "2018-06-13T15:38:00.000Z",
  "title": "The $X(4140)$ and $X(4160)$ resonances in the $e^+e^-\\to γJ/ψ φ$ reaction",
  "authors": [
    "En Wang",
    "Ju-Jun Xie",
    "Li-Sheng Geng",
    "Eulogio Oset"
  ],
  "comment": "5 pages, 5 figures",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "We investigate the $J/\\psi \\phi$ invariant mass distribution of the $e^+e^-\\to \\gamma J/\\psi\\phi$ reaction at a center of mass energy of $\\sqrt{s}=4.6$~GeV measured by the BESIII collaboration, who concludes that no significant signals are observed for $e^+e^- \\to \\gamma X(4140)$ because of the low statistics. We show, however, that the three bump structures in the $J/\\psi \\phi$ invariant mass distribution, though given only by three data points, are compatible with the existence of the $X(4140)$ state, appearing as a peak, and a strong cusp structure at the $D^*_s\\bar{D}^*_s$ threshold, resulting from the molecular nature of the $X(4160)$ state, which also provides a substantial contribution to the reaction. This is consistent with our previous analysis on the $B^+\\to J/\\psi\\phi K^+$ decay measured by the LHCb collaboration. We strongly call for the measurement of this process with more statistics to further pin down the nature of the $X(4140)$ and $X(4160)$ resonances.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-06-13T15:38:00.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "invariant mass distribution",
      "resonances",
      "strong cusp structure",
      "lhcb collaboration",
      "mass energy"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}