{
  "id": "1207.3561",
  "version": "v2",
  "published": "2012-07-16T01:33:25.000Z",
  "updated": "2012-10-31T15:43:51.000Z",
  "title": "Does the enhancement observed in $γγ\\to D\\bar{D}$ contain two $P$-wave higher charmonia?",
  "authors": [
    "Dian-Yong Chen",
    "Jun He",
    "Xiang Liu",
    "Takayuki Matsuki"
  ],
  "comment": "5 pages, 2 tables, 3 figures. More contents and discussions added",
  "journal": "Eur.Phys.J.C72:2226,2012",
  "doi": "10.1140/epjc/s10052-012-2226-4",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "Solved is a new puzzle raised by the observation of an enhancement structure Z(3930) in $\\gamma\\gamma\\to D\\bar{D}$. If categorizing Z(3930) as $\\chi_{c2}(2P)$ suggested by Belle and BaBar, we must explain why $\\chi_{c0}(2P)$ dominantly decaying into $D\\bar{D}$ is missing in the $D\\bar{D}$ invariant mass spectrum. In this work, we propose that the Z(3930) enhancement structure may contain two $P$-wave higher charmonia {$\\chi_{c0}(2P)$} and $\\chi_{c2}(2P)$. We show that this assumption is supported by our analysis of the $D\\bar{D}$ invariant mass spectrum and $\\cos\\theta^\\ast$ distribution of $\\gamma\\gamma\\to D\\bar{D}$. This observation would not only provide valuable information of two P-wave higher charmonia $\\chi_{c0}(2P)$ and $\\chi_{c2}(2P)$, but also serve as the crucial test of our novel proposal to the observed enhancement structure Z(3930), especially at the forthcoming BelleII and the approved SuperB.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2012-10-31T15:43:51.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.25.Gv",
      "12.38.Lg"
    ],
    "keywords": [
      "enhancement structure",
      "invariant mass spectrum",
      "p-wave higher charmonia",
      "novel proposal",
      "crucial test"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "European Physical Journal C",
      "year": 2012,
      "month": "Nov",
      "volume": 72,
      "pages": 2226
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1122679,
      "adsabs": "2012EPJC...72.2226C"
    }
  }
}